diff --git a/CMakeLists.txt b/CMakeLists.txt
index 75b81a292..61c145ded 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -442,7 +442,7 @@ string(CONCAT POST_BUILD_COMMENT
 # The additional / is important to remove the last character from the path.
 # Note that it does not matter if the OS uses / or \, because we are only
 # saving the path size.
-string(LENGTH "${CMAKE_SOURCE_DIR}/" SOURCE_PATH_SIZE)
+string(LENGTH "${CMAKE_SOURCE_DIR}/" FSFW_SOURCE_PATH_SIZE)
 target_compile_definitions(${LIB_FSFW_NAME} PRIVATE "-DFSFW_SOURCE_PATH_SIZE=${FSFW_SOURCE_PATH_SIZE}")
 
 add_custom_command(
diff --git a/hal/src/fsfw_hal/linux/i2c/I2cComIF.cpp b/hal/src/fsfw_hal/linux/i2c/I2cComIF.cpp
index 4f53dc1f7..a509dad1e 100644
--- a/hal/src/fsfw_hal/linux/i2c/I2cComIF.cpp
+++ b/hal/src/fsfw_hal/linux/i2c/I2cComIF.cpp
@@ -26,19 +26,10 @@ ReturnValue_t I2cComIF::initializeInterface(CookieIF* cookie) {
   std::string deviceFile;
 
   if (cookie == nullptr) {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::error << "I2cComIF::initializeInterface: Invalid cookie!" << std::endl;
-#endif
+    FSFW_LOGE("{}", "initializeInterface: Invalid cookie\n");
     return NULLPOINTER;
   }
-  I2cCookie* i2cCookie = dynamic_cast<I2cCookie*>(cookie);
-  if (i2cCookie == nullptr) {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::error << "I2cComIF::initializeInterface: Invalid I2C cookie!" << std::endl;
-#endif
-    return NULLPOINTER;
-  }
-
+  auto* i2cCookie = dynamic_cast<I2cCookie*>(cookie);
   i2cAddress = i2cCookie->getAddress();
 
   i2cDeviceMapIter = i2cDeviceMap.find(i2cAddress);
@@ -47,20 +38,14 @@ ReturnValue_t I2cComIF::initializeInterface(CookieIF* cookie) {
     I2cInstance i2cInstance = {std::vector<uint8_t>(maxReplyLen), 0};
     auto statusPair = i2cDeviceMap.emplace(i2cAddress, i2cInstance);
     if (not statusPair.second) {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-      sif::error << "I2cComIF::initializeInterface: Failed to insert device with address "
-                 << i2cAddress << "to I2C device "
-                 << "map" << std::endl;
-#endif
+      FSFW_LOGW("initializeInterface: Failed to insert device with address {} to I2C device map\n",
+                i2cAddress);
       return HasReturnvaluesIF::RETURN_FAILED;
     }
     return HasReturnvaluesIF::RETURN_OK;
   }
 
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-  sif::error << "I2cComIF::initializeInterface: Device with address " << i2cAddress
-             << "already in use" << std::endl;
-#endif
+  FSFW_LOGE("initializeInterface: Device with address {} already in use\n", i2cAddress);
   return HasReturnvaluesIF::RETURN_FAILED;
 }
 
@@ -70,9 +55,7 @@ ReturnValue_t I2cComIF::sendMessage(CookieIF* cookie, const uint8_t* sendData, s
   std::string deviceFile;
 
   if (sendData == nullptr) {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::error << "I2cComIF::sendMessage: Send Data is nullptr" << std::endl;
-#endif
+    FSFW_LOGW("{}", "sendMessage: Send Data is nullptr\n");
     return HasReturnvaluesIF::RETURN_FAILED;
   }
 
@@ -80,21 +63,16 @@ ReturnValue_t I2cComIF::sendMessage(CookieIF* cookie, const uint8_t* sendData, s
     return HasReturnvaluesIF::RETURN_OK;
   }
 
-  I2cCookie* i2cCookie = dynamic_cast<I2cCookie*>(cookie);
+  auto* i2cCookie = dynamic_cast<I2cCookie*>(cookie);
   if (i2cCookie == nullptr) {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::error << "I2cComIF::sendMessage: Invalid I2C Cookie!" << std::endl;
-#endif
+    FSFW_LOGWT("{}", "sendMessage: Invalid I2C Cookie\n");
     return NULLPOINTER;
   }
 
   address_t i2cAddress = i2cCookie->getAddress();
   i2cDeviceMapIter = i2cDeviceMap.find(i2cAddress);
   if (i2cDeviceMapIter == i2cDeviceMap.end()) {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::error << "I2cComIF::sendMessage: i2cAddress of Cookie not "
-               << "registered in i2cDeviceMap" << std::endl;
-#endif
+    FSFW_LOGWT("{}", "sendMessage: I2C address of cookie not registered in I2C device map\n");
     return HasReturnvaluesIF::RETURN_FAILED;
   }
 
@@ -109,11 +87,8 @@ ReturnValue_t I2cComIF::sendMessage(CookieIF* cookie, const uint8_t* sendData, s
   }
 
   if (write(fd, sendData, sendLen) != static_cast<int>(sendLen)) {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::error << "I2cComIF::sendMessage: Failed to send data to I2C "
-                  "device with error code "
-               << errno << ". Error description: " << strerror(errno) << std::endl;
-#endif
+    FSFW_LOGE("sendMessage: Failed to send data to I2C device with error code {} | {}\n", errno,
+              strerror(errno));
     return HasReturnvaluesIF::RETURN_FAILED;
   }
 
@@ -135,11 +110,9 @@ ReturnValue_t I2cComIF::requestReceiveMessage(CookieIF* cookie, size_t requestLe
     return HasReturnvaluesIF::RETURN_OK;
   }
 
-  I2cCookie* i2cCookie = dynamic_cast<I2cCookie*>(cookie);
+  auto* i2cCookie = dynamic_cast<I2cCookie*>(cookie);
   if (i2cCookie == nullptr) {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::error << "I2cComIF::requestReceiveMessage: Invalid I2C Cookie!" << std::endl;
-#endif
+    FSFW_LOGWT("{}", "requestReceiveMessage: Invalid I2C Cookie\n");
     i2cDeviceMapIter->second.replyLen = 0;
     return NULLPOINTER;
   }
@@ -147,10 +120,8 @@ ReturnValue_t I2cComIF::requestReceiveMessage(CookieIF* cookie, size_t requestLe
   address_t i2cAddress = i2cCookie->getAddress();
   i2cDeviceMapIter = i2cDeviceMap.find(i2cAddress);
   if (i2cDeviceMapIter == i2cDeviceMap.end()) {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::error << "I2cComIF::requestReceiveMessage: i2cAddress of Cookie not "
-               << "registered in i2cDeviceMap" << std::endl;
-#endif
+    FSFW_LOGW("requestReceiveMessage: I2C address {} of Cookie not registered in i2cDeviceMap",
+              i2cAddress);
     i2cDeviceMapIter->second.replyLen = 0;
     return HasReturnvaluesIF::RETURN_FAILED;
   }
@@ -168,20 +139,13 @@ ReturnValue_t I2cComIF::requestReceiveMessage(CookieIF* cookie, size_t requestLe
 
   uint8_t* replyBuffer = i2cDeviceMapIter->second.replyBuffer.data();
 
-  int readLen = read(fd, replyBuffer, requestLen);
+  ssize_t readLen = read(fd, replyBuffer, requestLen);
   if (readLen != static_cast<int>(requestLen)) {
-#if FSFW_VERBOSE_LEVEL >= 1 and FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::error << "I2cComIF::requestReceiveMessage: Reading from I2C "
-               << "device failed with error code " << errno << ". Description"
-               << " of error: " << strerror(errno) << std::endl;
-    sif::error << "I2cComIF::requestReceiveMessage: Read only " << readLen << " from " << requestLen
-               << " bytes" << std::endl;
-#endif
+    FSFW_LOGWT(
+        "requestReceiveMessage: Reading from I2C device failed with error code "
+        "{} | {}\nRead only {} from {} bytes\n",
+        errno, strerror(errno), readLen, requestLen);
     i2cDeviceMapIter->second.replyLen = 0;
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::debug << "I2cComIF::requestReceiveMessage: Read " << readLen << " of " << requestLen
-               << " bytes" << std::endl;
-#endif
     return HasReturnvaluesIF::RETURN_FAILED;
   }
 
@@ -195,21 +159,17 @@ ReturnValue_t I2cComIF::requestReceiveMessage(CookieIF* cookie, size_t requestLe
 }
 
 ReturnValue_t I2cComIF::readReceivedMessage(CookieIF* cookie, uint8_t** buffer, size_t* size) {
-  I2cCookie* i2cCookie = dynamic_cast<I2cCookie*>(cookie);
+  auto* i2cCookie = dynamic_cast<I2cCookie*>(cookie);
   if (i2cCookie == nullptr) {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::error << "I2cComIF::readReceivedMessage: Invalid I2C Cookie!" << std::endl;
-#endif
+    FSFW_LOGW("{}", "readReceivedMessage: Invalid I2C Cookie\n");
     return NULLPOINTER;
   }
 
   address_t i2cAddress = i2cCookie->getAddress();
   i2cDeviceMapIter = i2cDeviceMap.find(i2cAddress);
   if (i2cDeviceMapIter == i2cDeviceMap.end()) {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::error << "I2cComIF::readReceivedMessage: i2cAddress of Cookie not "
-               << "found in i2cDeviceMap" << std::endl;
-#endif
+    FSFW_LOGE("readReceivedMessage: I2C address {} of cookie not found in I2C device map\n",
+              i2cAddress);
     return HasReturnvaluesIF::RETURN_FAILED;
   }
   *buffer = i2cDeviceMapIter->second.replyBuffer.data();
@@ -221,16 +181,8 @@ ReturnValue_t I2cComIF::readReceivedMessage(CookieIF* cookie, uint8_t** buffer,
 ReturnValue_t I2cComIF::openDevice(std::string deviceFile, address_t i2cAddress,
                                    int* fileDescriptor) {
   if (ioctl(*fileDescriptor, I2C_SLAVE, i2cAddress) < 0) {
-#if FSFW_VERBOSE_LEVEL >= 1
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::warning << "I2cComIF: Specifying target device failed with error code " << errno << "."
-                 << std::endl;
-    sif::warning << "Error description " << strerror(errno) << std::endl;
-#else
-    sif::printWarning("I2cComIF: Specifying target device failed with error code %d.\n");
-    sif::printWarning("Error description: %s\n", strerror(errno));
-#endif /* FSFW_CPP_OSTREAM_ENABLED == 1 */
-#endif /* FSFW_VERBOSE_LEVEL >= 1 */
+    FSFW_LOGWT("openDevice: Specifying target device failed with error code {} | {}\n", errno,
+               strerror(errno));
     return HasReturnvaluesIF::RETURN_FAILED;
   }
   return HasReturnvaluesIF::RETURN_OK;
diff --git a/hal/src/fsfw_hal/linux/spi/SpiComIF.cpp b/hal/src/fsfw_hal/linux/spi/SpiComIF.cpp
index dcf92b5d9..e98b9de8b 100644
--- a/hal/src/fsfw_hal/linux/spi/SpiComIF.cpp
+++ b/hal/src/fsfw_hal/linux/spi/SpiComIF.cpp
@@ -11,6 +11,7 @@
 #include <cstring>
 
 #include "fsfw/FSFW.h"
+#include "fsfw/serviceinterface.h"
 #include "fsfw_hal/linux/UnixFileGuard.h"
 #include "fsfw_hal/linux/spi/SpiCookie.h"
 #include "fsfw_hal/linux/utility.h"
@@ -18,13 +19,7 @@
 SpiComIF::SpiComIF(object_id_t objectId, GpioIF* gpioComIF)
     : SystemObject(objectId), gpioComIF(gpioComIF) {
   if (gpioComIF == nullptr) {
-#if FSFW_VERBOSE_LEVEL >= 1
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::error << "SpiComIF::SpiComIF: GPIO communication interface invalid!" << std::endl;
-#else
-    sif::printError("SpiComIF::SpiComIF: GPIO communication interface invalid!\n");
-#endif /* FSFW_CPP_OSTREAM_ENABLED == 1 */
-#endif /* FSFW_VERBOSE_LEVEL >= 1 */
+    FSFW_LOGET("{}", "SpiComIF::SpiComIF: GPIO communication interface invalid\n");
   }
 
   spiMutex = MutexFactory::instance()->createMutex();
@@ -32,7 +27,7 @@ SpiComIF::SpiComIF(object_id_t objectId, GpioIF* gpioComIF)
 
 ReturnValue_t SpiComIF::initializeInterface(CookieIF* cookie) {
   int retval = 0;
-  SpiCookie* spiCookie = dynamic_cast<SpiCookie*>(cookie);
+  auto* spiCookie = dynamic_cast<SpiCookie*>(cookie);
   if (spiCookie == nullptr) {
     return NULLPOINTER;
   }
@@ -45,30 +40,17 @@ ReturnValue_t SpiComIF::initializeInterface(CookieIF* cookie) {
     SpiInstance spiInstance(bufferSize);
     auto statusPair = spiDeviceMap.emplace(spiAddress, spiInstance);
     if (not statusPair.second) {
-#if FSFW_VERBOSE_LEVEL >= 1
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-      sif::error << "SpiComIF::initializeInterface: Failed to insert device with address "
-                 << spiAddress << "to SPI device map" << std::endl;
-#else
-      sif::printError(
-          "SpiComIF::initializeInterface: Failed to insert device with address "
-          "%lu to SPI device map\n",
-          static_cast<unsigned long>(spiAddress));
-#endif /* FSFW_CPP_OSTREAM_ENABLED == 1 */
-#endif /* FSFW_VERBOSE_LEVEL >= 1 */
+      FSFW_LOGWT(
+          "SpiComIF::initializeInterface: Failed to insert device with address {} to SPI device "
+          "map\n",
+          spiAddress);
       return HasReturnvaluesIF::RETURN_FAILED;
     }
     /* Now we emplaced the read buffer in the map, we still need to assign that location
     to the SPI driver transfer struct */
     spiCookie->assignReadBuffer(statusPair.first->second.replyBuffer.data());
   } else {
-#if FSFW_VERBOSE_LEVEL >= 1
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::error << "SpiComIF::initializeInterface: SPI address already exists!" << std::endl;
-#else
-    sif::printError("SpiComIF::initializeInterface: SPI address already exists!\n");
-#endif /* FSFW_CPP_OSTREAM_ENABLED == 1 */
-#endif /* FSFW_VERBOSE_LEVEL >= 1 */
+    FSFW_LOGWT("{}", "initializeInterface: SPI address already exists\n");
     return HasReturnvaluesIF::RETURN_FAILED;
   }
 
@@ -133,7 +115,7 @@ ReturnValue_t SpiComIF::initializeInterface(CookieIF* cookie) {
 }
 
 ReturnValue_t SpiComIF::sendMessage(CookieIF* cookie, const uint8_t* sendData, size_t sendLen) {
-  SpiCookie* spiCookie = dynamic_cast<SpiCookie*>(cookie);
+  auto* spiCookie = dynamic_cast<SpiCookie*>(cookie);
   ReturnValue_t result = HasReturnvaluesIF::RETURN_OK;
 
   if (spiCookie == nullptr) {
@@ -141,19 +123,9 @@ ReturnValue_t SpiComIF::sendMessage(CookieIF* cookie, const uint8_t* sendData, s
   }
 
   if (sendLen > spiCookie->getMaxBufferSize()) {
-#if FSFW_VERBOSE_LEVEL >= 1
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::warning << "SpiComIF::sendMessage: Too much data sent, send length " << sendLen
-                 << "larger than maximum buffer length " << spiCookie->getMaxBufferSize()
-                 << std::endl;
-#else
-    sif::printWarning(
-        "SpiComIF::sendMessage: Too much data sent, send length %lu larger "
-        "than maximum buffer length %lu!\n",
-        static_cast<unsigned long>(sendLen),
-        static_cast<unsigned long>(spiCookie->getMaxBufferSize()));
-#endif /* FSFW_CPP_OSTREAM_ENABLED == 1 */
-#endif /* FSFW_VERBOSE_LEVEL >= 1 */
+    FSFW_LOGW(
+        "sendMessage: Too much data sent, send length {} larger than maximum buffer length {}\n",
+        spiCookie->getMaxBufferSize(), sendLen);
     return DeviceCommunicationIF::TOO_MUCH_DATA;
   }
 
@@ -201,24 +173,12 @@ ReturnValue_t SpiComIF::performRegularSendOperation(SpiCookie* spiCookie, const
   if (gpioId != gpio::NO_GPIO) {
     result = spiMutex->lockMutex(timeoutType, timeoutMs);
     if (result != RETURN_OK) {
-#if FSFW_VERBOSE_LEVEL >= 1
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-      sif::error << "SpiComIF::sendMessage: Failed to lock mutex" << std::endl;
-#else
-      sif::printError("SpiComIF::sendMessage: Failed to lock mutex\n");
-#endif
-#endif
+      FSFW_LOGET("{}", "sendMessage: Failed to lock mutex\n");
       return result;
     }
-    ReturnValue_t result = gpioComIF->pullLow(gpioId);
+    result = gpioComIF->pullLow(gpioId);
     if (result != HasReturnvaluesIF::RETURN_OK) {
-#if FSFW_VERBOSE_LEVEL >= 1
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-      sif::warning << "SpiComIF::sendMessage: Pulling low CS pin failed" << std::endl;
-#else
-      sif::printWarning("SpiComIF::sendMessage: Pulling low CS pin failed");
-#endif
-#endif
+      FSFW_LOGW("{}", "sendMessage: Pulling low CS pin failed\n");
       return result;
     }
   }
@@ -237,13 +197,7 @@ ReturnValue_t SpiComIF::performRegularSendOperation(SpiCookie* spiCookie, const
   } else {
     /* We write with a blocking half-duplex transfer here */
     if (write(fileDescriptor, sendData, sendLen) != static_cast<ssize_t>(sendLen)) {
-#if FSFW_VERBOSE_LEVEL >= 1
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-      sif::warning << "SpiComIF::sendMessage: Half-Duplex write operation failed!" << std::endl;
-#else
-      sif::printWarning("SpiComIF::sendMessage: Half-Duplex write operation failed!\n");
-#endif /* FSFW_CPP_OSTREAM_ENABLED == 1 */
-#endif /* FSFW_VERBOSE_LEVEL >= 1 */
+      FSFW_LOGET("{}", "sendMessage: Half-Duplex write operation failed\n");
       result = HALF_DUPLEX_TRANSFER_FAILED;
     }
   }
@@ -252,9 +206,7 @@ ReturnValue_t SpiComIF::performRegularSendOperation(SpiCookie* spiCookie, const
     gpioComIF->pullHigh(gpioId);
     result = spiMutex->unlockMutex();
     if (result != RETURN_OK) {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-      sif::error << "SpiComIF::sendMessage: Failed to unlock mutex" << std::endl;
-#endif
+      FSFW_LOGWT("{}", "sendMessage: Failed to unlock mutex\n");
       return result;
     }
   }
@@ -264,7 +216,7 @@ ReturnValue_t SpiComIF::performRegularSendOperation(SpiCookie* spiCookie, const
 ReturnValue_t SpiComIF::getSendSuccess(CookieIF* cookie) { return HasReturnvaluesIF::RETURN_OK; }
 
 ReturnValue_t SpiComIF::requestReceiveMessage(CookieIF* cookie, size_t requestLen) {
-  SpiCookie* spiCookie = dynamic_cast<SpiCookie*>(cookie);
+  auto* spiCookie = dynamic_cast<SpiCookie*>(cookie);
   if (spiCookie == nullptr) {
     return NULLPOINTER;
   }
@@ -296,22 +248,14 @@ ReturnValue_t SpiComIF::performHalfDuplexReception(SpiCookie* spiCookie) {
   if (gpioId != gpio::NO_GPIO) {
     result = spiMutex->lockMutex(timeoutType, timeoutMs);
     if (result != RETURN_OK) {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-      sif::error << "SpiComIF::getSendSuccess: Failed to lock mutex" << std::endl;
-#endif
+      FSFW_LOGW("{}", "getSendSuccess: Failed to lock mutex\n");
       return result;
     }
     gpioComIF->pullLow(gpioId);
   }
 
   if (read(fileDescriptor, rxBuf, readSize) != static_cast<ssize_t>(readSize)) {
-#if FSFW_VERBOSE_LEVEL >= 1
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::warning << "SpiComIF::sendMessage: Half-Duplex read operation failed!" << std::endl;
-#else
-    sif::printWarning("SpiComIF::sendMessage: Half-Duplex read operation failed!\n");
-#endif /* FSFW_CPP_OSTREAM_ENABLED == 1 */
-#endif /* FSFW_VERBOSE_LEVEL >= 1 */
+    FSFW_LOGW("{}", "sendMessage: Half-Duplex read operation failed\n");
     result = HALF_DUPLEX_TRANSFER_FAILED;
   }
 
@@ -319,9 +263,7 @@ ReturnValue_t SpiComIF::performHalfDuplexReception(SpiCookie* spiCookie) {
     gpioComIF->pullHigh(gpioId);
     result = spiMutex->unlockMutex();
     if (result != RETURN_OK) {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-      sif::error << "SpiComIF::getSendSuccess: Failed to unlock mutex" << std::endl;
-#endif
+      FSFW_LOGW("{}", "getSendSuccess: Failed to unlock mutex\n");
       return result;
     }
   }
@@ -330,7 +272,7 @@ ReturnValue_t SpiComIF::performHalfDuplexReception(SpiCookie* spiCookie) {
 }
 
 ReturnValue_t SpiComIF::readReceivedMessage(CookieIF* cookie, uint8_t** buffer, size_t* size) {
-  SpiCookie* spiCookie = dynamic_cast<SpiCookie*>(cookie);
+  auto* spiCookie = dynamic_cast<SpiCookie*>(cookie);
   if (spiCookie == nullptr) {
     return HasReturnvaluesIF::RETURN_FAILED;
   }
@@ -361,16 +303,10 @@ void SpiComIF::performSpiWiretapping(SpiCookie* spiCookie) {
     return;
   }
   size_t dataLen = spiCookie->getTransferStructHandle()->len;
-  uint8_t* dataPtr = reinterpret_cast<uint8_t*>(spiCookie->getTransferStructHandle()->tx_buf);
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-  sif::info << "Sent SPI data: " << std::endl;
+  auto* dataPtr = reinterpret_cast<uint8_t*>(spiCookie->getTransferStructHandle()->tx_buf);
+  sif::info("Sent SPI data:\n");
   arrayprinter::print(dataPtr, dataLen, OutputType::HEX, false);
-  sif::info << "Received SPI data: " << std::endl;
-#else
-  sif::printInfo("Sent SPI data: \n");
-  arrayprinter::print(dataPtr, dataLen, OutputType::HEX, false);
-  sif::printInfo("Received SPI data: \n");
-#endif /* FSFW_CPP_OSTREAM_ENABLED == 1 */
+  sif::info("Received SPI data:\n");
   dataPtr = reinterpret_cast<uint8_t*>(spiCookie->getTransferStructHandle()->rx_buf);
   arrayprinter::print(dataPtr, dataLen, OutputType::HEX, false);
 }
diff --git a/hal/src/fsfw_hal/linux/uart/UartComIF.cpp b/hal/src/fsfw_hal/linux/uart/UartComIF.cpp
index 72c79df65..6f042efaf 100644
--- a/hal/src/fsfw_hal/linux/uart/UartComIF.cpp
+++ b/hal/src/fsfw_hal/linux/uart/UartComIF.cpp
@@ -1,10 +1,10 @@
 #include "UartComIF.h"
 
-#include <errno.h>
 #include <fcntl.h>
 #include <termios.h>
 #include <unistd.h>
 
+#include <cerrno>
 #include <cstring>
 
 #include "fsfw/FSFW.h"
@@ -23,11 +23,9 @@ ReturnValue_t UartComIF::initializeInterface(CookieIF* cookie) {
     return NULLPOINTER;
   }
 
-  UartCookie* uartCookie = dynamic_cast<UartCookie*>(cookie);
+  auto* uartCookie = dynamic_cast<UartCookie*>(cookie);
   if (uartCookie == nullptr) {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::error << "UartComIF::initializeInterface: Invalid UART Cookie!" << std::endl;
-#endif
+    FSFW_LOGE("{}", "initializeInterface: Invalid UART Cookie\n");
     return NULLPOINTER;
   }
 
@@ -42,18 +40,12 @@ ReturnValue_t UartComIF::initializeInterface(CookieIF* cookie) {
     size_t maxReplyLen = uartCookie->getMaxReplyLen();
     UartElements uartElements = {fileDescriptor, std::vector<uint8_t>(maxReplyLen), 0};
     auto status = uartDeviceMap.emplace(deviceFile, uartElements);
-    if (status.second == false) {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-      sif::warning << "UartComIF::initializeInterface: Failed to insert device " << deviceFile
-                   << "to UART device map" << std::endl;
-#endif
+    if (!status.second) {
+      FSFW_LOGW("initializeInterface: Failed to insert device {} to UART device map\n", deviceFile);
       return RETURN_FAILED;
     }
   } else {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::warning << "UartComIF::initializeInterface: UART device " << deviceFile
-                 << " already in use" << std::endl;
-#endif
+    FSFW_LOGW("initializeInterface: UART device {} already in use\n", deviceFile);
     return RETURN_FAILED;
   }
 
@@ -73,19 +65,14 @@ int UartComIF::configureUartPort(UartCookie* uartCookie) {
   int fd = open(deviceFile.c_str(), flags);
 
   if (fd < 0) {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::warning << "UartComIF::configureUartPort: Failed to open uart " << deviceFile
-                 << "with error code " << errno << strerror(errno) << std::endl;
-#endif
+    FSFW_LOGW("configureUartPort: Failed to open UART {} with error code {} | {}\n", deviceFile,
+              errno, strerror(errno));
     return fd;
   }
 
   /* Read in existing settings */
   if (tcgetattr(fd, &options) != 0) {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::warning << "UartComIF::configureUartPort: Error " << errno
-                 << "from tcgetattr: " << strerror(errno) << std::endl;
-#endif
+    FSFW_LOGW("configureUartPort: Error {} from tcgetattr: {}\n", errno, strerror(errno));
     return fd;
   }
 
@@ -106,10 +93,8 @@ int UartComIF::configureUartPort(UartCookie* uartCookie) {
 
   /* Save option settings */
   if (tcsetattr(fd, TCSANOW, &options) != 0) {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::warning << "UartComIF::configureUartPort: Failed to set options with error " << errno
-                 << ": " << strerror(errno);
-#endif
+    FSFW_LOGW("configureUartPort: Failed to set options with error {} | {}\n", errno,
+              strerror(errno));
     return fd;
   }
   return fd;
@@ -161,9 +146,8 @@ void UartComIF::setDatasizeOptions(struct termios* options, UartCookie* uartCook
       options->c_cflag |= CS8;
       break;
     default:
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-      sif::warning << "UartComIF::setDatasizeOptions: Invalid size specified" << std::endl;
-#endif
+      FSFW_LOGW("setDatasizeOptions: Invalid size {} specified\n",
+                static_cast<unsigned int>(uartCookie->getBitsPerWord()));
       break;
   }
 }
@@ -314,11 +298,9 @@ void UartComIF::configureBaudrate(struct termios* options, UartCookie* uartCooki
       cfsetispeed(options, B4000000);
       cfsetospeed(options, B4000000);
       break;
-#endif // ! __APPLE__
+#endif  // ! __APPLE__
     default:
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-      sif::warning << "UartComIF::configureBaudrate: Baudrate not supported" << std::endl;
-#endif
+      FSFW_LOGW("{}", "UartComIF::configureBaudrate: Baudrate not supported\n");
       break;
   }
 }
@@ -333,37 +315,27 @@ ReturnValue_t UartComIF::sendMessage(CookieIF* cookie, const uint8_t* sendData,
   }
 
   if (sendData == nullptr) {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::warning << "UartComIF::sendMessage: Send data is nullptr" << std::endl;
-#endif
+    FSFW_LOGWT("{}", "sendMessage: Send data is nullptr");
     return RETURN_FAILED;
   }
 
-  UartCookie* uartCookie = dynamic_cast<UartCookie*>(cookie);
+  auto* uartCookie = dynamic_cast<UartCookie*>(cookie);
   if (uartCookie == nullptr) {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::warning << "UartComIF::sendMessasge: Invalid UART Cookie!" << std::endl;
-#endif
+    FSFW_LOGWT("{}", "sendMessage: Invalid UART Cookie\n");
     return NULLPOINTER;
   }
 
   deviceFile = uartCookie->getDeviceFile();
   uartDeviceMapIter = uartDeviceMap.find(deviceFile);
   if (uartDeviceMapIter == uartDeviceMap.end()) {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::debug << "UartComIF::sendMessage: Device file " << deviceFile << "not in UART map"
-               << std::endl;
-#endif
+    FSFW_LOGWT("{}", "sendMessage: Device file {} not in UART map\n", deviceFile);
     return RETURN_FAILED;
   }
 
   fd = uartDeviceMapIter->second.fileDescriptor;
 
   if (write(fd, sendData, sendLen) != static_cast<int>(sendLen)) {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::error << "UartComIF::sendMessage: Failed to send data with error code " << errno
-               << ": Error description: " << strerror(errno) << std::endl;
-#endif
+    FSFW_LOGE("sendMessage: Failed to send data with error code {} | {}", errno, strerror(errno));
     return RETURN_FAILED;
   }
 
@@ -376,11 +348,9 @@ ReturnValue_t UartComIF::requestReceiveMessage(CookieIF* cookie, size_t requestL
   std::string deviceFile;
   UartDeviceMapIter uartDeviceMapIter;
 
-  UartCookie* uartCookie = dynamic_cast<UartCookie*>(cookie);
+  auto* uartCookie = dynamic_cast<UartCookie*>(cookie);
   if (uartCookie == nullptr) {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::debug << "UartComIF::requestReceiveMessage: Invalid Uart Cookie!" << std::endl;
-#endif
+    FSFW_LOGWT("{}", "requestReceiveMessage: Invalid UART Cookie\n");
     return NULLPOINTER;
   }
 
@@ -393,10 +363,7 @@ ReturnValue_t UartComIF::requestReceiveMessage(CookieIF* cookie, size_t requestL
   }
 
   if (uartDeviceMapIter == uartDeviceMap.end()) {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::debug << "UartComIF::requestReceiveMessage: Device file " << deviceFile
-               << " not in uart map" << std::endl;
-#endif
+    FSFW_LOGW("requestReceiveMessage: Device file {} not in UART map\n", deviceFile);
     return RETURN_FAILED;
   }
 
@@ -414,7 +381,7 @@ ReturnValue_t UartComIF::handleCanonicalRead(UartCookie& uartCookie, UartDeviceM
   ReturnValue_t result = HasReturnvaluesIF::RETURN_OK;
   uint8_t maxReadCycles = uartCookie.getReadCycles();
   uint8_t currentReadCycles = 0;
-  int bytesRead = 0;
+  ssize_t bytesRead = 0;
   size_t currentBytesRead = 0;
   size_t maxReplySize = uartCookie.getMaxReplyLen();
   int fd = iter->second.fileDescriptor;
@@ -425,16 +392,7 @@ ReturnValue_t UartComIF::handleCanonicalRead(UartCookie& uartCookie, UartDeviceM
     if (currentBytesRead >= maxReplySize) {
       // Overflow risk. Emit warning, trigger event and break. If this happens,
       // the reception buffer is not large enough or data is not polled often enough.
-#if FSFW_VERBOSE_LEVEL >= 1
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-      sif::warning << "UartComIF::requestReceiveMessage: Next read would cause overflow!"
-                   << std::endl;
-#else
-      sif::printWarning(
-          "UartComIF::requestReceiveMessage: "
-          "Next read would cause overflow!");
-#endif
-#endif
+      FSFW_LOGWT("{}", "requestReceiveMessage: Next read would cause overflow\n");
       result = UART_RX_BUFFER_TOO_SMALL;
       break;
     } else {
@@ -445,15 +403,7 @@ ReturnValue_t UartComIF::handleCanonicalRead(UartCookie& uartCookie, UartDeviceM
     if (bytesRead < 0) {
       // EAGAIN: No data available in non-blocking mode
       if (errno != EAGAIN) {
-#if FSFW_VERBOSE_LEVEL >= 1
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-        sif::warning << "UartComIF::handleCanonicalRead: read failed with code" << errno << ": "
-                     << strerror(errno) << std::endl;
-#else
-        sif::printWarning("UartComIF::handleCanonicalRead: read failed with code %d: %s\n", errno,
-                          strerror(errno));
-#endif
-#endif
+        FSFW_LOGWT("handleCanonicalRead: read failed with code {} | {}\n", errno, strerror(errno));
         return RETURN_FAILED;
       }
 
@@ -473,27 +423,16 @@ ReturnValue_t UartComIF::handleNoncanonicalRead(UartCookie& uartCookie, UartDevi
   auto bufferPtr = iter->second.replyBuffer.data();
   // Size check to prevent buffer overflow
   if (requestLen > uartCookie.getMaxReplyLen()) {
-#if FSFW_VERBOSE_LEVEL >= 1
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::warning << "UartComIF::requestReceiveMessage: Next read would cause overflow!"
-                 << std::endl;
-#else
-    sif::printWarning(
-        "UartComIF::requestReceiveMessage: "
-        "Next read would cause overflow!");
-#endif
-#endif
+    FSFW_LOGW("{}", "requestReceiveMessage: Next read would cause overflow\n");
     return UART_RX_BUFFER_TOO_SMALL;
   }
-  int bytesRead = read(fd, bufferPtr, requestLen);
+  ssize_t bytesRead = read(fd, bufferPtr, requestLen);
   if (bytesRead < 0) {
     return RETURN_FAILED;
   } else if (bytesRead != static_cast<int>(requestLen)) {
     if (uartCookie.isReplySizeFixed()) {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-      sif::warning << "UartComIF::requestReceiveMessage: Only read " << bytesRead << " of "
-                   << requestLen << " bytes" << std::endl;
-#endif
+      FSFW_LOGWT("UartComIF::requestReceiveMessage: Only read {} of {} bytes\n", bytesRead,
+                 requestLen);
       return RETURN_FAILED;
     }
   }
@@ -505,21 +444,16 @@ ReturnValue_t UartComIF::readReceivedMessage(CookieIF* cookie, uint8_t** buffer,
   std::string deviceFile;
   UartDeviceMapIter uartDeviceMapIter;
 
-  UartCookie* uartCookie = dynamic_cast<UartCookie*>(cookie);
+  auto* uartCookie = dynamic_cast<UartCookie*>(cookie);
   if (uartCookie == nullptr) {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::debug << "UartComIF::readReceivedMessage: Invalid uart cookie!" << std::endl;
-#endif
+    FSFW_LOGWT("{}", "readReceivedMessage: Invalid uart cookie");
     return NULLPOINTER;
   }
 
   deviceFile = uartCookie->getDeviceFile();
   uartDeviceMapIter = uartDeviceMap.find(deviceFile);
   if (uartDeviceMapIter == uartDeviceMap.end()) {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::debug << "UartComIF::readReceivedMessage: Device file " << deviceFile << " not in uart map"
-               << std::endl;
-#endif
+    FSFW_LOGW("UartComIF::readReceivedMessage: Device file {} not in UART map\n", deviceFile);
     return RETURN_FAILED;
   }
 
@@ -535,11 +469,9 @@ ReturnValue_t UartComIF::readReceivedMessage(CookieIF* cookie, uint8_t** buffer,
 ReturnValue_t UartComIF::flushUartRxBuffer(CookieIF* cookie) {
   std::string deviceFile;
   UartDeviceMapIter uartDeviceMapIter;
-  UartCookie* uartCookie = dynamic_cast<UartCookie*>(cookie);
+  auto* uartCookie = dynamic_cast<UartCookie*>(cookie);
   if (uartCookie == nullptr) {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::warning << "UartComIF::flushUartRxBuffer: Invalid uart cookie!" << std::endl;
-#endif
+    FSFW_LOGWT("{}", "flushUartRxBuffer: Invalid UART cookie\n");
     return NULLPOINTER;
   }
   deviceFile = uartCookie->getDeviceFile();
@@ -555,11 +487,9 @@ ReturnValue_t UartComIF::flushUartRxBuffer(CookieIF* cookie) {
 ReturnValue_t UartComIF::flushUartTxBuffer(CookieIF* cookie) {
   std::string deviceFile;
   UartDeviceMapIter uartDeviceMapIter;
-  UartCookie* uartCookie = dynamic_cast<UartCookie*>(cookie);
+  auto* uartCookie = dynamic_cast<UartCookie*>(cookie);
   if (uartCookie == nullptr) {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::warning << "UartComIF::flushUartTxBuffer: Invalid uart cookie!" << std::endl;
-#endif
+    FSFW_LOGWT("{}", "flushUartTxBuffer: Invalid uart cookie\n");
     return NULLPOINTER;
   }
   deviceFile = uartCookie->getDeviceFile();
@@ -575,11 +505,9 @@ ReturnValue_t UartComIF::flushUartTxBuffer(CookieIF* cookie) {
 ReturnValue_t UartComIF::flushUartTxAndRxBuf(CookieIF* cookie) {
   std::string deviceFile;
   UartDeviceMapIter uartDeviceMapIter;
-  UartCookie* uartCookie = dynamic_cast<UartCookie*>(cookie);
+  auto* uartCookie = dynamic_cast<UartCookie*>(cookie);
   if (uartCookie == nullptr) {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::warning << "UartComIF::flushUartTxAndRxBuf: Invalid uart cookie!" << std::endl;
-#endif
+    FSFW_LOGWT("{}", "flushUartTxAndRxBuf: Invalid UART cookie\n");
     return NULLPOINTER;
   }
   deviceFile = uartCookie->getDeviceFile();
diff --git a/hal/src/fsfw_hal/linux/uart/UartComIF.h b/hal/src/fsfw_hal/linux/uart/UartComIF.h
index 224f1e774..e20fc19f9 100644
--- a/hal/src/fsfw_hal/linux/uart/UartComIF.h
+++ b/hal/src/fsfw_hal/linux/uart/UartComIF.h
@@ -90,7 +90,7 @@ class UartComIF : public DeviceCommunicationIF, public SystemObject {
    *                      parity settings.
    *
    */
-  void setParityOptions(struct termios* options, UartCookie* uartCookie);
+  static void setParityOptions(struct termios* options, UartCookie* uartCookie);
 
   void setStopBitOptions(struct termios* options, UartCookie* uartCookie);
 
diff --git a/hal/src/fsfw_hal/linux/uart/UartCookie.h b/hal/src/fsfw_hal/linux/uart/UartCookie.h
index 6840b3521..f1d7fa36d 100644
--- a/hal/src/fsfw_hal/linux/uart/UartCookie.h
+++ b/hal/src/fsfw_hal/linux/uart/UartCookie.h
@@ -12,7 +12,7 @@ enum class StopBits { ONE_STOP_BIT, TWO_STOP_BITS };
 
 enum class UartModes { CANONICAL, NON_CANONICAL };
 
-enum class BitsPerWord { BITS_5, BITS_6, BITS_7, BITS_8 };
+enum class BitsPerWord : unsigned int { BITS_5 = 5, BITS_6 = 6, BITS_7 = 7, BITS_8 = 8 };
 
 enum class UartBaudRate {
   RATE_50,
diff --git a/src/fsfw/action/ActionHelper.cpp b/src/fsfw/action/ActionHelper.cpp
index d41c78b4b..13cc6fdc4 100644
--- a/src/fsfw/action/ActionHelper.cpp
+++ b/src/fsfw/action/ActionHelper.cpp
@@ -1,7 +1,7 @@
 #include "fsfw/action.h"
 #include "fsfw/ipc/MessageQueueSenderIF.h"
 #include "fsfw/objectmanager/ObjectManager.h"
-#include "fsfw/serviceinterface/ServiceInterface.h"
+#include "fsfw/serviceinterface.h"
 
 ActionHelper::ActionHelper(HasActionsIF* setOwner, MessageQueueIF* useThisQueue)
     : owner(setOwner), queueToUse(useThisQueue) {}
@@ -28,13 +28,7 @@ ReturnValue_t ActionHelper::initialize(MessageQueueIF* queueToUse_) {
   }
 
   if (queueToUse == nullptr) {
-#if FSFW_VERBOSE_LEVEL >= 1
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::warning << "ActionHelper::initialize: No queue set" << std::endl;
-#else
-    sif::printWarning("ActionHelper::initialize: No queue set\n");
-#endif
-#endif /* FSFW_VERBOSE_LEVEL >= 1 */
+    FSFW_LOGW("{}", "initialize: No queue set\n");
     return HasReturnvaluesIF::RETURN_FAILED;
   }
 
@@ -96,14 +90,7 @@ ReturnValue_t ActionHelper::reportData(MessageQueueId_t reportTo, ActionId_t rep
   size_t size = 0;
   ReturnValue_t result = ipcStore->getFreeElement(&storeAddress, maxSize, &dataPtr);
   if (result != HasReturnvaluesIF::RETURN_OK) {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::warning << "ActionHelper::reportData: Getting free element from IPC store failed!"
-                 << std::endl;
-#else
-    sif::printWarning(
-        "ActionHelper::reportData: Getting free element from IPC "
-        "store failed!\n");
-#endif
+    FSFW_LOGWT("{}", "reportData: Getting free element from IPC store failed\n");
     return result;
   }
   result = data->serialize(&dataPtr, &size, maxSize, SerializeIF::Endianness::BIG);
@@ -138,11 +125,7 @@ ReturnValue_t ActionHelper::reportData(MessageQueueId_t reportTo, ActionId_t rep
   store_address_t storeAddress;
   ReturnValue_t result = ipcStore->addData(&storeAddress, data, dataSize);
   if (result != HasReturnvaluesIF::RETURN_OK) {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::warning << "ActionHelper::reportData: Adding data to IPC store failed!" << std::endl;
-#else
-    sif::printWarning("ActionHelper::reportData: Adding data to IPC store failed!\n");
-#endif
+    FSFW_LOGWT("{}", "reportData: Adding data to IPC store failed\n");
     return result;
   }
 
diff --git a/src/fsfw/cfdp/CFDPHandler.cpp b/src/fsfw/cfdp/CFDPHandler.cpp
index 96baa98c7..7c23c1334 100644
--- a/src/fsfw/cfdp/CFDPHandler.cpp
+++ b/src/fsfw/cfdp/CFDPHandler.cpp
@@ -4,6 +4,7 @@
 #include "fsfw/ipc/CommandMessage.h"
 #include "fsfw/ipc/QueueFactory.h"
 #include "fsfw/objectmanager/ObjectManager.h"
+#include "fsfw/serviceinterface.h"
 #include "fsfw/storagemanager/storeAddress.h"
 #include "fsfw/tmtcservices/AcceptsTelemetryIF.h"
 
@@ -28,13 +29,7 @@ ReturnValue_t CFDPHandler::initialize() {
 }
 
 ReturnValue_t CFDPHandler::handleRequest(store_address_t storeId) {
-#if FSFW_VERBOSE_LEVEL >= 1
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-  sif::debug << "CFDPHandler::handleRequest" << std::endl;
-#else
-  sif::printDebug("CFDPHandler::handleRequest\n");
-#endif /* !FSFW_CPP_OSTREAM_ENABLED == 1 */
-#endif
+  FSFW_LOGDT("{}", "CFDPHandler::handleRequest\n");
 
   // TODO read out packet from store using storeId
 
diff --git a/src/fsfw/cfdp/pdu/EofPduDeserializer.cpp b/src/fsfw/cfdp/pdu/EofPduDeserializer.cpp
index e1ab8dc98..3e77f2211 100644
--- a/src/fsfw/cfdp/pdu/EofPduDeserializer.cpp
+++ b/src/fsfw/cfdp/pdu/EofPduDeserializer.cpp
@@ -50,17 +50,9 @@ ReturnValue_t EofPduDeserializer::parseData() {
   if (info.getConditionCode() != cfdp::ConditionCode::NO_ERROR) {
     EntityIdTlv* tlvPtr = info.getFaultLoc();
     if (tlvPtr == nullptr) {
-#if FSFW_VERBOSE_LEVEL >= 1
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-      sif::warning << "EofPduDeserializer::parseData: Ca not deserialize fault location,"
-                      " given TLV pointer invalid"
-                   << std::endl;
-#else
-      sif::printWarning(
-          "EofPduDeserializer::parseData: Ca not deserialize fault location,"
-          " given TLV pointer invalid");
-#endif
-#endif /* FSFW_VERBOSE_LEVEL >= 1 */
+      FSFW_LOGW("{}",
+                "parseData: Ca not deserialize fault location,"
+                " given TLV pointer invalid\n");
       return HasReturnvaluesIF::RETURN_FAILED;
     }
     result = tlvPtr->deSerialize(&bufPtr, &deserLen, endianness);
diff --git a/src/fsfw/cfdp/pdu/VarLenField.cpp b/src/fsfw/cfdp/pdu/VarLenField.cpp
index b11c3b09b..24b04b4a9 100644
--- a/src/fsfw/cfdp/pdu/VarLenField.cpp
+++ b/src/fsfw/cfdp/pdu/VarLenField.cpp
@@ -7,13 +7,7 @@
 cfdp::VarLenField::VarLenField(cfdp::WidthInBytes width, size_t value) : VarLenField() {
   ReturnValue_t result = this->setValue(width, value);
   if (result != HasReturnvaluesIF::RETURN_OK) {
-#if FSFW_DISABLE_PRINTOUT == 0
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::warning << "cfdp::VarLenField: Setting value failed" << std::endl;
-#else
-    sif::printWarning("cfdp::VarLenField: Setting value failed\n");
-#endif
-#endif
+    FSFW_LOGW("{}", "cfdp::VarLenField: Setting value failed\n");
   }
 }
 
diff --git a/src/fsfw/cfdp/tlv/FilestoreTlvBase.h b/src/fsfw/cfdp/tlv/FilestoreTlvBase.h
index 04012cda2..528c482b8 100644
--- a/src/fsfw/cfdp/tlv/FilestoreTlvBase.h
+++ b/src/fsfw/cfdp/tlv/FilestoreTlvBase.h
@@ -6,7 +6,7 @@
 #include <fsfw/cfdp/tlv/Tlv.h>
 #include <fsfw/cfdp/tlv/TlvIF.h>
 #include <fsfw/serialize/SerializeIF.h>
-#include <fsfw/serviceinterface/ServiceInterface.h>
+#include <fsfw/serviceinterface.h>
 
 #include <cstddef>
 #include <cstdint>
@@ -128,17 +128,7 @@ class FilestoreTlvBase : public TlvIF {
   }
 
   void secondFileNameMissing() const {
-#if FSFW_VERBOSE_LEVEL >= 1
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::warning << "FilestoreRequestTlv::deSerialize: Second file name required"
-                    " but TLV pointer not set"
-                 << std::endl;
-#else
-    sif::printWarning(
-        "FilestoreRequestTlv::deSerialize: Second file name required"
-        " but TLV pointer not set\n");
-#endif
-#endif
+    FSFW_LOGWT("{}", "secondFileNameMissing: Second file name required but TLV pointer not set\n");
   }
 
   FilestoreActionCode getActionCode() const { return actionCode; }
diff --git a/src/fsfw/datapool/PoolDataSetBase.cpp b/src/fsfw/datapool/PoolDataSetBase.cpp
index b31f4725e..891a95e2c 100644
--- a/src/fsfw/datapool/PoolDataSetBase.cpp
+++ b/src/fsfw/datapool/PoolDataSetBase.cpp
@@ -3,7 +3,7 @@
 #include <cstring>
 
 #include "fsfw/datapool/ReadCommitIFAttorney.h"
-#include "fsfw/serviceinterface/ServiceInterface.h"
+#include "fsfw/serviceinterface.h"
 
 PoolDataSetBase::PoolDataSetBase(PoolVariableIF** registeredVariablesArray,
                                  const size_t maxFillCount)
@@ -17,27 +17,15 @@ ReturnValue_t PoolDataSetBase::registerVariable(PoolVariableIF* variable) {
     return HasReturnvaluesIF::RETURN_FAILED;
   }
   if (state != States::STATE_SET_UNINITIALISED) {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::error << "DataSet::registerVariable: Call made in wrong position." << std::endl;
-#else
-    sif::printError("DataSet::registerVariable: Call made in wrong position.");
-#endif
+    FSFW_LOGW("{}", "registerVariable: Call made in wrong position\n");
     return DataSetIF::DATA_SET_UNINITIALISED;
   }
   if (variable == nullptr) {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::error << "DataSet::registerVariable: Pool variable is nullptr." << std::endl;
-#else
-    sif::printError("DataSet::registerVariable: Pool variable is nullptr.\n");
-#endif
+    FSFW_LOGW("{}", "registerVariable: Pool variable is nullptr\n");
     return DataSetIF::POOL_VAR_NULL;
   }
   if (fillCount >= maxFillCount) {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::error << "DataSet::registerVariable: DataSet is full." << std::endl;
-#else
-    sif::printError("DataSet::registerVariable: DataSet is full.\n");
-#endif
+    FSFW_LOGW("{}", "registerVariable: DataSet is full\n");
     return DataSetIF::DATA_SET_FULL;
   }
   registeredVariables[fillCount] = variable;
@@ -59,15 +47,7 @@ ReturnValue_t PoolDataSetBase::read(MutexIF::TimeoutType timeoutType, uint32_t l
     state = States::STATE_SET_WAS_READ;
     unlockDataPool();
   } else {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::warning << "PoolDataSetBase::read: Call made in wrong position. Don't forget to "
-                    "commit member datasets!"
-                 << std::endl;
-#else
-    sif::printWarning(
-        "PoolDataSetBase::read: Call made in wrong position. Don't forget to "
-        "commit member datasets!\n");
-#endif /* FSFW_CPP_OSTREAM_ENABLED == 1 */
+    FSFW_LOGWT("{}", "read: Call made in wrong position. commit call might be missing\n");
     result = SET_WAS_ALREADY_READ;
   }
 
diff --git a/src/fsfw/datapool/PoolEntry.cpp b/src/fsfw/datapool/PoolEntry.cpp
index fd110e6c7..c52f1a0fa 100644
--- a/src/fsfw/datapool/PoolEntry.cpp
+++ b/src/fsfw/datapool/PoolEntry.cpp
@@ -4,7 +4,7 @@
 #include <cstring>
 
 #include "fsfw/globalfunctions/arrayprinter.h"
-#include "fsfw/serviceinterface/ServiceInterface.h"
+#include "fsfw/serviceinterface.h"
 
 template <typename T>
 PoolEntry<T>::PoolEntry(std::initializer_list<T> initValue, bool setValid)
@@ -68,13 +68,7 @@ void PoolEntry<T>::print() {
   } else {
     validString = "Invalid";
   }
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-  sif::info << "PoolEntry information." << std::endl;
-  sif::info << "PoolEntry validity: " << validString << std::endl;
-#else
-  sif::printInfo("PoolEntry information.\n");
-  sif::printInfo("PoolEntry validity: %s\n", validString);
-#endif
+  FSFW_LOGI("PoolEntry Info. Validity {}\n", validString);
   arrayprinter::print(reinterpret_cast<uint8_t*>(address), getByteSize());
 }
 
diff --git a/src/fsfw/datapool/PoolReadGuard.h b/src/fsfw/datapool/PoolReadGuard.h
index 24d989330..d9c42fa76 100644
--- a/src/fsfw/datapool/PoolReadGuard.h
+++ b/src/fsfw/datapool/PoolReadGuard.h
@@ -1,10 +1,9 @@
 #ifndef FSFW_DATAPOOL_POOLREADHELPER_H_
 #define FSFW_DATAPOOL_POOLREADHELPER_H_
 
-#include <FSFWConfig.h>
-
-#include "../serviceinterface/ServiceInterface.h"
 #include "ReadCommitIF.h"
+#include "fsfw/FSFW.h"
+#include "fsfw/serviceinterface.h"
 
 /**
  * @brief 	Helper class to read data sets or pool variables
@@ -18,13 +17,7 @@ class PoolReadGuard {
     if (readObject != nullptr) {
       readResult = readObject->read(timeoutType, mutexTimeout);
       if (readResult != HasReturnvaluesIF::RETURN_OK) {
-#if FSFW_VERBOSE_LEVEL == 1
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-        sif::error << "PoolReadHelper: Read failed!" << std::endl;
-#else
-        sif::printError("PoolReadHelper: Read failed!\n");
-#endif /* FSFW_PRINT_VERBOSITY_LEVEL == 1 */
-#endif /* FSFW_CPP_OSTREAM_ENABLED == 1 */
+        FSFW_LOGW("{}", "ctor: Read failed\n");
       }
     }
   }
diff --git a/src/fsfw/datapoollocal/HasLocalDataPoolIF.h b/src/fsfw/datapoollocal/HasLocalDataPoolIF.h
index a2925a46e..8650c29e7 100644
--- a/src/fsfw/datapoollocal/HasLocalDataPoolIF.h
+++ b/src/fsfw/datapoollocal/HasLocalDataPoolIF.h
@@ -166,15 +166,7 @@ class HasLocalDataPoolIF {
    * @return
    */
   virtual LocalPoolObjectBase* getPoolObjectHandle(lp_id_t localPoolId) {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::warning << "HasLocalDataPoolIF::getPoolObjectHandle: Not overriden. "
-                    "Returning nullptr!"
-                 << std::endl;
-#else
-    sif::printWarning(
-        "HasLocalDataPoolIF::getPoolObjectHandle: "
-        "Not overriden. Returning nullptr!\n");
-#endif
+    FSFW_LOGW("{}", "HasLocalDataPoolIF::getPoolObjectHandle: Not overriden. Returning nullptr\n");
     return nullptr;
   }
 };
diff --git a/src/fsfw/datapoollocal/LocalDataPoolManager.cpp b/src/fsfw/datapoollocal/LocalDataPoolManager.cpp
index 781d8f71f..94da2ac98 100644
--- a/src/fsfw/datapoollocal/LocalDataPoolManager.cpp
+++ b/src/fsfw/datapoollocal/LocalDataPoolManager.cpp
@@ -695,11 +695,7 @@ void LocalDataPoolManager::performPeriodicHkGeneration(HkReceiver& receiver) {
   ReturnValue_t result = generateHousekeepingPacket(sid, dataSet, true);
   if (result != HasReturnvaluesIF::RETURN_OK) {
     /* Configuration error */
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::warning << "LocalDataPoolManager::performHkOperation: HK generation failed." << std::endl;
-#else
-    sif::printWarning("LocalDataPoolManager::performHkOperation: HK generation failed.\n");
-#endif
+    FSFW_LOGWT("{}", "performHkOperation: HK generation failed");
   }
 }
 
diff --git a/src/fsfw/datapoollocal/LocalPoolDataSetBase.cpp b/src/fsfw/datapoollocal/LocalPoolDataSetBase.cpp
index 62fdb184f..cd533cd99 100644
--- a/src/fsfw/datapoollocal/LocalPoolDataSetBase.cpp
+++ b/src/fsfw/datapoollocal/LocalPoolDataSetBase.cpp
@@ -7,7 +7,7 @@
 #include "fsfw/housekeeping/PeriodicHousekeepingHelper.h"
 #include "fsfw/objectmanager/ObjectManager.h"
 #include "fsfw/serialize/SerializeAdapter.h"
-#include "fsfw/serviceinterface/ServiceInterface.h"
+#include "fsfw/serviceinterface.h"
 #include "internal/HasLocalDpIFUserAttorney.h"
 
 LocalPoolDataSetBase::LocalPoolDataSetBase(HasLocalDataPoolIF *hkOwner, uint32_t setId,
@@ -16,14 +16,7 @@ LocalPoolDataSetBase::LocalPoolDataSetBase(HasLocalDataPoolIF *hkOwner, uint32_t
     : PoolDataSetBase(registeredVariablesArray, maxNumberOfVariables) {
   if (hkOwner == nullptr) {
     // Configuration error.
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::error << "LocalPoolDataSetBase::LocalPoolDataSetBase: Owner "
-               << "invalid!" << std::endl;
-#else
-    sif::printError(
-        "LocalPoolDataSetBase::LocalPoolDataSetBase: Owner "
-        "invalid!\n\r");
-#endif /* FSFW_CPP_OSTREAM_ENABLED == 1 */
+    FSFW_LOGW("{}", "LocalPoolDataSetBase::LocalPoolDataSetBase: Owner invalid\n");
     return;
   }
   AccessPoolManagerIF *accessor = HasLocalDpIFUserAttorney::getAccessorHandle(hkOwner);
@@ -186,14 +179,7 @@ ReturnValue_t LocalPoolDataSetBase::serializeLocalPoolIds(uint8_t **buffer, size
     auto result =
         SerializeAdapter::serialize(&currentPoolId, buffer, size, maxSize, streamEndianness);
     if (result != HasReturnvaluesIF::RETURN_OK) {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-      sif::warning << "LocalPoolDataSetBase::serializeLocalPoolIds: "
-                   << "Serialization error!" << std::endl;
-#else
-      sif::printWarning(
-          "LocalPoolDataSetBase::serializeLocalPoolIds: "
-          "Serialization error!\n\r");
-#endif /* FSFW_CPP_OSTREAM_ENABLED == 1 */
+      FSFW_LOGW("{}", "serializeLocalPoolIds: Serialization error\n");
       return result;
     }
   }
diff --git a/src/fsfw/datapoollocal/LocalPoolObjectBase.cpp b/src/fsfw/datapoollocal/LocalPoolObjectBase.cpp
index 82aefc18c..5d0a3068f 100644
--- a/src/fsfw/datapoollocal/LocalPoolObjectBase.cpp
+++ b/src/fsfw/datapoollocal/LocalPoolObjectBase.cpp
@@ -4,22 +4,17 @@
 #include "fsfw/datapoollocal/HasLocalDataPoolIF.h"
 #include "fsfw/datapoollocal/LocalDataPoolManager.h"
 #include "fsfw/objectmanager/ObjectManager.h"
+#include "fsfw/serviceinterface.h"
 #include "internal/HasLocalDpIFUserAttorney.h"
 
 LocalPoolObjectBase::LocalPoolObjectBase(lp_id_t poolId, HasLocalDataPoolIF* hkOwner,
                                          DataSetIF* dataSet, pool_rwm_t setReadWriteMode)
     : localPoolId(poolId), readWriteMode(setReadWriteMode) {
   if (poolId == PoolVariableIF::NO_PARAMETER) {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::warning << "LocalPoolVar<T>::LocalPoolVar: 0 passed as pool ID, "
-                 << "which is the NO_PARAMETER value!" << std::endl;
-#endif
+    FSFW_LOGWT("{}", "ctor: Invalid pool ID, has NO_PARAMETER value\n");
   }
   if (hkOwner == nullptr) {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::error << "LocalPoolVar<T>::LocalPoolVar: The supplied pool "
-               << "owner is a invalid!" << std::endl;
-#endif
+    FSFW_LOGET("{}", "ctor: Supplied pool owner is a invalid\n");
     return;
   }
   AccessPoolManagerIF* poolManAccessor = HasLocalDpIFUserAttorney::getAccessorHandle(hkOwner);
@@ -34,28 +29,14 @@ LocalPoolObjectBase::LocalPoolObjectBase(object_id_t poolOwner, lp_id_t poolId,
                                          pool_rwm_t setReadWriteMode)
     : localPoolId(poolId), readWriteMode(setReadWriteMode) {
   if (poolId == PoolVariableIF::NO_PARAMETER) {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::warning << "LocalPoolVar<T>::LocalPoolVar: 0 passed as pool ID, "
-                    "which is the NO_PARAMETER value!"
-                 << std::endl;
-#else
-    sif::printWarning(
-        "LocalPoolVar<T>::LocalPoolVar: 0 passed as pool ID, "
-        "which is the NO_PARAMETER value!\n");
-#endif
+    FSFW_LOGWT("{}", "ctor: Invalid pool ID, has NO_PARAMETER value\n");
   }
-  HasLocalDataPoolIF* hkOwner = ObjectManager::instance()->get<HasLocalDataPoolIF>(poolOwner);
+  auto* hkOwner = ObjectManager::instance()->get<HasLocalDataPoolIF>(poolOwner);
   if (hkOwner == nullptr) {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::error << "LocalPoolVariable: The supplied pool owner 0x" << std::hex << poolOwner
-               << std::dec << " did not implement the correct interface "
-               << "HasLocalDataPoolIF" << std::endl;
-#else
-    sif::printError(
-        "LocalPoolVariable: The supplied pool owner 0x%08x did not implement the correct "
-        "interface HasLocalDataPoolIF\n",
+    FSFW_LOGWT(
+        "ctor: The supplied pool owner {:#08x} did not implement the correct interface "
+        "HasLocalDataPoolIF\n",
         poolOwner);
-#endif
     return;
   }
 
@@ -89,7 +70,6 @@ void LocalPoolObjectBase::setReadWriteMode(pool_rwm_t newReadWriteMode) {
 
 void LocalPoolObjectBase::reportReadCommitError(const char* variableType, ReturnValue_t error,
                                                 bool read, object_id_t objectId, lp_id_t lpId) {
-#if FSFW_DISABLE_PRINTOUT == 0
   const char* variablePrintout = variableType;
   if (variablePrintout == nullptr) {
     variablePrintout = "Unknown Type";
@@ -114,13 +94,6 @@ void LocalPoolObjectBase::reportReadCommitError(const char* variableType, Return
     errMsg = "Unknown error code";
   }
 
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-  sif::warning << variablePrintout << ": " << type << " call | " << errMsg << " | Owner: 0x"
-               << std::hex << std::setw(8) << std::setfill('0') << objectId << std::dec
-               << " LPID: " << lpId << std::endl;
-#else
-  sif::printWarning("%s: %s call | %s | Owner: 0x%08x LPID: %lu\n", variablePrintout, type, errMsg,
-                    objectId, lpId);
-#endif /* FSFW_CPP_OSTREAM_ENABLED == 1 */
-#endif /* FSFW_DISABLE_PRINTOUT == 0 */
+  FSFW_LOGW("{}: {} call | {} | Owner: {:#08x} | LPID: \n", variablePrintout, type, errMsg,
+            objectId, lpId);
 }
diff --git a/src/fsfw/datapoollocal/LocalPoolVector.tpp b/src/fsfw/datapoollocal/LocalPoolVector.tpp
index 044b8fa72..8112f92ca 100644
--- a/src/fsfw/datapoollocal/LocalPoolVector.tpp
+++ b/src/fsfw/datapoollocal/LocalPoolVector.tpp
@@ -98,13 +98,7 @@ inline T& LocalPoolVector<T, vectorSize>::operator [](size_t i) {
     }
     // If this happens, I have to set some value. I consider this
     // a configuration error, but I wont exit here.
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::warning << "LocalPoolVector: Invalid index. Setting or returning"
-            " last value!" << std::endl;
-#else
-    sif::printWarning("LocalPoolVector: Invalid index. Setting or returning"
-            " last value!\n");
-#endif
+   FSFW_LOGWT("{}", "operator[]: Invalid index. Setting or returning last value\n");
     return value[vectorSize - 1];
 }
 
@@ -115,13 +109,7 @@ inline const T& LocalPoolVector<T, vectorSize>::operator [](size_t i) const {
     }
     // If this happens, I have to set some value. I consider this
     // a configuration error, but I wont exit here.
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::warning << "LocalPoolVector: Invalid index. Setting or returning"
-            " last value!" << std::endl;
-#else
-    sif::printWarning("LocalPoolVector: Invalid index. Setting or returning"
-            " last value!\n");
-#endif
+    FSFW_LOGWT("{}", "operator[]: Invalid index. Setting or returning last value\n");
     return value[vectorSize - 1];
 }
 
diff --git a/src/fsfw/devicehandlers/DeviceHandlerBase.cpp b/src/fsfw/devicehandlers/DeviceHandlerBase.cpp
index dd9bd5d7d..e51043d92 100644
--- a/src/fsfw/devicehandlers/DeviceHandlerBase.cpp
+++ b/src/fsfw/devicehandlers/DeviceHandlerBase.cpp
@@ -150,22 +150,15 @@ ReturnValue_t DeviceHandlerBase::initialize() {
   }
 
   if (rawDataReceiverId != objects::NO_OBJECT) {
-    AcceptsDeviceResponsesIF* rawReceiver =
-        ObjectManager::instance()->get<AcceptsDeviceResponsesIF>(rawDataReceiverId);
+    auto* rawReceiver = ObjectManager::instance()->get<AcceptsDeviceResponsesIF>(rawDataReceiverId);
 
     if (rawReceiver == nullptr) {
       printWarningOrError(sif::OutputTypes::OUT_ERROR, "initialize",
                           ObjectManagerIF::CHILD_INIT_FAILED,
                           "Raw receiver object ID set but no valid object found.");
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-      sif::error << "Make sure the raw receiver object is set up properly"
-                    " and implements AcceptsDeviceResponsesIF"
-                 << std::endl;
-#else
-      sif::printError(
-          "Make sure the raw receiver object is set up "
-          "properly and implements AcceptsDeviceResponsesIF\n");
-#endif
+      FSFW_LOGE("{}",
+                "Make sure the raw receiver object is set up properly "
+                "and implements AcceptsDeviceResponsesIF");
       return ObjectManagerIF::CHILD_INIT_FAILED;
     }
     defaultRawReceiver = rawReceiver->getDeviceQueue();
@@ -177,14 +170,9 @@ ReturnValue_t DeviceHandlerBase::initialize() {
       printWarningOrError(sif::OutputTypes::OUT_ERROR, "initialize",
                           ObjectManagerIF::CHILD_INIT_FAILED,
                           "Power switcher set but no valid object found.");
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-      sif::error << "Make sure the power switcher object is set up "
-                 << "properly and implements PowerSwitchIF" << std::endl;
-#else
-      sif::printError(
-          "Make sure the power switcher object is set up "
-          "properly and implements PowerSwitchIF\n");
-#endif
+      FSFW_LOGE("{}",
+                "Make sure the power switcher object is set up "
+                "properly and implements PowerSwitchIF\n");
       return ObjectManagerIF::CHILD_INIT_FAILED;
     }
   }
@@ -767,11 +755,9 @@ void DeviceHandlerBase::parseReply(const uint8_t* receivedData, size_t receivedD
           printWarningOrError(sif::OutputTypes::OUT_ERROR, "parseReply",
                               ObjectManagerIF::CHILD_INIT_FAILED,
                               "Power switcher set but no valid object found.");
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-          sif::warning << "DeviceHandlerBase::parseReply: foundLen is 0!"
-                          " Packet parsing will be stuck."
-                       << std::endl;
-#endif
+          FSFW_LOGW("{}",
+                    "DeviceHandlerBase::parseReply: foundLen is 0! "
+                    "Packet parsing will be stuck\n");
         }
         break;
       }
@@ -1476,23 +1462,11 @@ void DeviceHandlerBase::printWarningOrError(sif::OutputTypes errorType, const ch
   }
 
   if (errorType == sif::OutputTypes::OUT_WARNING) {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::warning << "DeviceHandlerBase::" << functionName << ": Object ID 0x" << std::hex
-                 << std::setw(8) << std::setfill('0') << this->getObjectId() << " | " << errorPrint
-                 << std::dec << std::setfill(' ') << std::endl;
-#else
-    sif::printWarning("DeviceHandlerBase::%s: Object ID 0x%08x | %s\n", functionName,
-                      this->getObjectId(), errorPrint);
-#endif
+    FSFW_LOGWT("{} | Object ID {:#08x} | {}", functionName, SystemObject::getObjectId(),
+               errorPrint);
   } else if (errorType == sif::OutputTypes::OUT_ERROR) {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::error << "DeviceHandlerBase::" << functionName << ": Object ID 0x" << std::hex
-               << std::setw(8) << std::setfill('0') << this->getObjectId() << " | " << errorPrint
-               << std::dec << std::setfill(' ') << std::endl;
-#else
-    sif::printError("DeviceHandlerBase::%s: Object ID 0x%08x | %s\n", functionName,
-                    this->getObjectId(), errorPrint);
-#endif
+    FSFW_LOGET("{} | Object ID {:#08x} | {}", functionName, SystemObject::getObjectId(),
+               errorPrint);
   }
 }
 
diff --git a/src/fsfw/devicehandlers/DeviceHandlerBase.h b/src/fsfw/devicehandlers/DeviceHandlerBase.h
index 5808b8e69..84dcb8dcc 100644
--- a/src/fsfw/devicehandlers/DeviceHandlerBase.h
+++ b/src/fsfw/devicehandlers/DeviceHandlerBase.h
@@ -1062,7 +1062,8 @@ class DeviceHandlerBase : public DeviceHandlerIF,
   /**
    * Same as triggerEvent, but for forwarding if object is used as proxy.
    */
-  virtual void forwardEvent(Event event, uint32_t parameter1 = 0, uint32_t parameter2 = 0) const override;
+  virtual void forwardEvent(Event event, uint32_t parameter1 = 0,
+                            uint32_t parameter2 = 0) const override;
 
   /**
    * Checks if current mode is transitional mode.
diff --git a/src/fsfw/devicehandlers/DeviceHandlerFailureIsolation.cpp b/src/fsfw/devicehandlers/DeviceHandlerFailureIsolation.cpp
index 48783c200..185de217a 100644
--- a/src/fsfw/devicehandlers/DeviceHandlerFailureIsolation.cpp
+++ b/src/fsfw/devicehandlers/DeviceHandlerFailureIsolation.cpp
@@ -5,7 +5,7 @@
 #include "fsfw/modes/HasModesIF.h"
 #include "fsfw/objectmanager/ObjectManager.h"
 #include "fsfw/power/Fuse.h"
-#include "fsfw/serviceinterface/ServiceInterfaceStream.h"
+#include "fsfw/serviceinterface.h"
 #include "fsfw/thermal/ThermalComponentIF.h"
 
 object_id_t DeviceHandlerFailureIsolation::powerConfirmationId = objects::NO_OBJECT;
@@ -163,15 +163,10 @@ void DeviceHandlerFailureIsolation::clearFaultCounters() {
 ReturnValue_t DeviceHandlerFailureIsolation::initialize() {
   ReturnValue_t result = FailureIsolationBase::initialize();
   if (result != HasReturnvaluesIF::RETURN_OK) {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::error << "DeviceHandlerFailureIsolation::initialize: Could not"
-                  " initialize FailureIsolationBase."
-               << std::endl;
-#endif
+    FSFW_LOGE("{}", "initialize: Could not initialize FailureIsolationBase\n");
     return result;
   }
-  ConfirmsFailuresIF* power =
-      ObjectManager::instance()->get<ConfirmsFailuresIF>(powerConfirmationId);
+  auto* power = ObjectManager::instance()->get<ConfirmsFailuresIF>(powerConfirmationId);
   if (power != nullptr) {
     powerConfirmation = power->getEventReceptionQueue();
   }
diff --git a/src/fsfw/events/EventManagerIF.h b/src/fsfw/events/EventManagerIF.h
index 98051ba05..2ab9af411 100644
--- a/src/fsfw/events/EventManagerIF.h
+++ b/src/fsfw/events/EventManagerIF.h
@@ -4,9 +4,9 @@
 #include "../ipc/MessageQueueIF.h"
 #include "../ipc/MessageQueueSenderIF.h"
 #include "../objectmanager/ObjectManager.h"
-#include "../serviceinterface/ServiceInterface.h"
 #include "EventMessage.h"
 #include "eventmatching/eventmatching.h"
+#include "fsfw/serviceinterface.h"
 
 class EventManagerIF {
  public:
@@ -39,19 +39,9 @@ class EventManagerIF {
 
   static void triggerEvent(EventMessage* message, MessageQueueId_t sentFrom = 0) {
     if (eventmanagerQueue == MessageQueueIF::NO_QUEUE) {
-      EventManagerIF* eventmanager =
-          ObjectManager::instance()->get<EventManagerIF>(objects::EVENT_MANAGER);
+      auto* eventmanager = ObjectManager::instance()->get<EventManagerIF>(objects::EVENT_MANAGER);
       if (eventmanager == nullptr) {
-#if FSFW_VERBOSE_LEVEL >= 1
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-        sif::warning << "EventManagerIF::triggerEvent: EventManager invalid or not found!"
-                     << std::endl;
-#else
-        sif::printWarning(
-            "EventManagerIF::triggerEvent: "
-            "EventManager invalid or not found!");
-#endif /* FSFW_CPP_OSTREAM_ENABLED == 1 */
-#endif /* FSFW_VERBOSE_LEVEL >= 1 */
+        FSFW_LOGW("{}", "EventManagerIF::triggerEvent: EventManager invalid or not found\n");
         return;
       }
       eventmanagerQueue = eventmanager->getEventReportQueue();
diff --git a/src/fsfw/fdir/FailureIsolationBase.cpp b/src/fsfw/fdir/FailureIsolationBase.cpp
index fedef8696..39fbe0221 100644
--- a/src/fsfw/fdir/FailureIsolationBase.cpp
+++ b/src/fsfw/fdir/FailureIsolationBase.cpp
@@ -18,13 +18,9 @@ FailureIsolationBase::~FailureIsolationBase() {
 }
 
 ReturnValue_t FailureIsolationBase::initialize() {
-  EventManagerIF* manager = ObjectManager::instance()->get<EventManagerIF>(objects::EVENT_MANAGER);
+  auto* manager = ObjectManager::instance()->get<EventManagerIF>(objects::EVENT_MANAGER);
   if (manager == nullptr) {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::error << "FailureIsolationBase::initialize: Event Manager has not"
-                  " been initialized!"
-               << std::endl;
-#endif
+    FSFW_LOGE("{}", "initialize: Event Manager has not been initialized\n");
     return RETURN_FAILED;
   }
   ReturnValue_t result = manager->registerListener(eventQueue->getId());
@@ -38,27 +34,19 @@ ReturnValue_t FailureIsolationBase::initialize() {
     }
     owner = ObjectManager::instance()->get<HasHealthIF>(ownerId);
     if (owner == nullptr) {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-      sif::error << "FailureIsolationBase::intialize: Owner object "
-                    "invalid. Make sure it implements HasHealthIF"
-                 << std::endl;
-#endif
+      FSFW_LOGE(
+          "FailureIsolationBase::intialize: Owner object {:#08x} invalid. "
+          "Does it implement HasHealthIF?\n",
+          ownerId);
       return ObjectManagerIF::CHILD_INIT_FAILED;
     }
   }
   if (faultTreeParent != objects::NO_OBJECT) {
-    ConfirmsFailuresIF* parentIF =
-        ObjectManager::instance()->get<ConfirmsFailuresIF>(faultTreeParent);
+    auto* parentIF = ObjectManager::instance()->get<ConfirmsFailuresIF>(faultTreeParent);
     if (parentIF == nullptr) {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-      sif::error << "FailureIsolationBase::intialize: Parent object"
-                 << "invalid." << std::endl;
-#endif
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-      sif::error << "Make sure it implements ConfirmsFailuresIF." << std::endl;
-#endif
+      FSFW_LOGW("intialize: Parent object {:#08x} invalid. Does it implement ConfirmsFailuresIF?\n",
+                faultTreeParent);
       return ObjectManagerIF::CHILD_INIT_FAILED;
-      return RETURN_FAILED;
     }
     eventQueue->setDefaultDestination(parentIF->getEventReceptionQueue());
   }
diff --git a/src/fsfw/globalfunctions/arrayprinter.cpp b/src/fsfw/globalfunctions/arrayprinter.cpp
index 40dc09f56..c8de86102 100644
--- a/src/fsfw/globalfunctions/arrayprinter.cpp
+++ b/src/fsfw/globalfunctions/arrayprinter.cpp
@@ -3,31 +3,16 @@
 #include <bitset>
 #include <cmath>
 
-#include "fsfw/serviceinterface/ServiceInterface.h"
+#include "fsfw/serviceinterface.h"
 
 void arrayprinter::print(const uint8_t *data, size_t size, OutputType type, bool printInfo,
                          size_t maxCharPerLine) {
   if (size == 0) {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::info << "Size is zero, nothing to print" << std::endl;
-#else
-    sif::printInfo("Size is zero, nothing to print\n");
-#endif
+    FSFW_LOGI("{}", "Size is zero, nothing to print\n");
     return;
   }
 
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-  if (printInfo) {
-    sif::info << "Printing data with size " << size << ": " << std::endl;
-  }
-#else
-#if FSFW_NO_C99_IO == 1
-  sif::printInfo("Printing data with size %lu: \n", static_cast<unsigned long>(size));
-#else
-  sif::printInfo("Printing data with size %zu: \n", size);
-#endif /* FSFW_NO_C99_IO == 1 */
-#endif /* FSFW_CPP_OSTREAM_ENABLED == 1 */
-
+  FSFW_LOGI("Printing data with size {}:\n", size);
   if (type == OutputType::HEX) {
     arrayprinter::printHex(data, size, maxCharPerLine);
   } else if (type == OutputType::DEC) {
@@ -38,99 +23,99 @@ void arrayprinter::print(const uint8_t *data, size_t size, OutputType type, bool
 }
 
 void arrayprinter::printHex(const uint8_t *data, size_t size, size_t maxCharPerLine) {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-  if (sif::info.crAdditionEnabled()) {
-    std::cout << "\r" << std::endl;
-  }
-
-  std::cout << "hex [" << std::setfill('0') << std::hex;
-  for (size_t i = 0; i < size; i++) {
-    std::cout << std::setw(2) << static_cast<int>(data[i]);
-    if (i < size - 1) {
-      std::cout << ",";
-      if (i > 0 and (i + 1) % maxCharPerLine == 0) {
-        std::cout << std::endl;
-      }
-    }
-  }
-  std::cout << std::dec << std::setfill(' ');
-  std::cout << "]" << std::endl;
-#else
-  // General format: 0x01, 0x02, 0x03 so it is number of chars times 6
-  // plus line break plus small safety margin.
-  char printBuffer[(size + 1) * 7 + 1] = {};
-  size_t currentPos = 0;
-  for (size_t i = 0; i < size; i++) {
-    // To avoid buffer overflows.
-    if (sizeof(printBuffer) - currentPos <= 7) {
-      break;
-    }
-
-    currentPos += snprintf(printBuffer + currentPos, 6, "%02x", data[i]);
-    if (i < size - 1) {
-      currentPos += sprintf(printBuffer + currentPos, ",");
-      if ((i + 1) % maxCharPerLine == 0) {
-        currentPos += sprintf(printBuffer + currentPos, "\n");
-      }
-    }
-  }
-#if FSFW_DISABLE_PRINTOUT == 0
-  printf("hex [%s]\n", printBuffer);
-#endif /* FSFW_DISABLE_PRINTOUT == 0 */
-#endif
+  //#if FSFW_CPP_OSTREAM_ENABLED == 1
+  //  if (sif::info.crAdditionEnabled()) {
+  //    std::cout << "\r" << std::endl;
+  //  }
+  //
+  //  std::cout << "hex [" << std::setfill('0') << std::hex;
+  //  for (size_t i = 0; i < size; i++) {
+  //    std::cout << std::setw(2) << static_cast<int>(data[i]);
+  //    if (i < size - 1) {
+  //      std::cout << ",";
+  //      if (i > 0 and (i + 1) % maxCharPerLine == 0) {
+  //        std::cout << std::endl;
+  //      }
+  //    }
+  //  }
+  //  std::cout << std::dec << std::setfill(' ');
+  //  std::cout << "]" << std::endl;
+  //#else
+  //  // General format: 0x01, 0x02, 0x03 so it is number of chars times 6
+  //  // plus line break plus small safety margin.
+  //  char printBuffer[(size + 1) * 7 + 1] = {};
+  //  size_t currentPos = 0;
+  //  for (size_t i = 0; i < size; i++) {
+  //    // To avoid buffer overflows.
+  //    if (sizeof(printBuffer) - currentPos <= 7) {
+  //      break;
+  //    }
+  //
+  //    currentPos += snprintf(printBuffer + currentPos, 6, "%02x", data[i]);
+  //    if (i < size - 1) {
+  //      currentPos += sprintf(printBuffer + currentPos, ",");
+  //      if ((i + 1) % maxCharPerLine == 0) {
+  //        currentPos += sprintf(printBuffer + currentPos, "\n");
+  //      }
+  //    }
+  //  }
+  //#if FSFW_DISABLE_PRINTOUT == 0
+  //  printf("hex [%s]\n", printBuffer);
+  //#endif /* FSFW_DISABLE_PRINTOUT == 0 */
+  //#endif
 }
 
 void arrayprinter::printDec(const uint8_t *data, size_t size, size_t maxCharPerLine) {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-  if (sif::info.crAdditionEnabled()) {
-    std::cout << "\r" << std::endl;
-  }
-
-  std::cout << "dec [" << std::dec;
-  for (size_t i = 0; i < size; i++) {
-    std::cout << static_cast<int>(data[i]);
-    if (i < size - 1) {
-      std::cout << ",";
-      if (i > 0 and (i + 1) % maxCharPerLine == 0) {
-        std::cout << std::endl;
-      }
-    }
-  }
-  std::cout << "]" << std::endl;
-#else
-  // General format: 32,243,-12 so it is number of chars times 4
-  // plus line break plus small safety margin.
-  uint16_t expectedLines = ceil((double)size / maxCharPerLine);
-  char printBuffer[size * 4 + 1 + expectedLines] = {};
-  size_t currentPos = 0;
-  for (size_t i = 0; i < size; i++) {
-    // To avoid buffer overflows.
-    if (sizeof(printBuffer) - currentPos <= 4) {
-      break;
-    }
-
-    currentPos += snprintf(printBuffer + currentPos, 4, "%d", data[i]);
-    if (i < size - 1) {
-      currentPos += sprintf(printBuffer + currentPos, ",");
-      if ((i + 1) % maxCharPerLine == 0) {
-        currentPos += sprintf(printBuffer + currentPos, "\n");
-      }
-    }
-  }
-#if FSFW_DISABLE_PRINTOUT == 0
-  printf("dec [%s]\n", printBuffer);
-#endif /* FSFW_DISABLE_PRINTOUT == 0 */
-#endif
+  //#if FSFW_CPP_OSTREAM_ENABLED == 1
+  //  if (sif::info.crAdditionEnabled()) {
+  //    std::cout << "\r" << std::endl;
+  //  }
+  //
+  //  std::cout << "dec [" << std::dec;
+  //  for (size_t i = 0; i < size; i++) {
+  //    std::cout << static_cast<int>(data[i]);
+  //    if (i < size - 1) {
+  //      std::cout << ",";
+  //      if (i > 0 and (i + 1) % maxCharPerLine == 0) {
+  //        std::cout << std::endl;
+  //      }
+  //    }
+  //  }
+  //  std::cout << "]" << std::endl;
+  //#else
+  //  // General format: 32,243,-12 so it is number of chars times 4
+  //  // plus line break plus small safety margin.
+  //  uint16_t expectedLines = ceil((double)size / maxCharPerLine);
+  //  char printBuffer[size * 4 + 1 + expectedLines] = {};
+  //  size_t currentPos = 0;
+  //  for (size_t i = 0; i < size; i++) {
+  //    // To avoid buffer overflows.
+  //    if (sizeof(printBuffer) - currentPos <= 4) {
+  //      break;
+  //    }
+  //
+  //    currentPos += snprintf(printBuffer + currentPos, 4, "%d", data[i]);
+  //    if (i < size - 1) {
+  //      currentPos += sprintf(printBuffer + currentPos, ",");
+  //      if ((i + 1) % maxCharPerLine == 0) {
+  //        currentPos += sprintf(printBuffer + currentPos, "\n");
+  //      }
+  //    }
+  //  }
+  //#if FSFW_DISABLE_PRINTOUT == 0
+  //  printf("dec [%s]\n", printBuffer);
+  //#endif /* FSFW_DISABLE_PRINTOUT == 0 */
+  //#endif
 }
 
 void arrayprinter::printBin(const uint8_t *data, size_t size) {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-  for (size_t i = 0; i < size; i++) {
-    sif::info << "Byte " << i + 1 << ": 0b" << std::bitset<8>(data[i]) << std::endl;
-  }
-#else
-  for (size_t i = 0; i < size; i++) {
-    sif::printInfo("Byte %d: 0b" BYTE_TO_BINARY_PATTERN "\n", i + 1, BYTE_TO_BINARY(data[i]));
-  }
-#endif
+  //#if FSFW_CPP_OSTREAM_ENABLED == 1
+  //  for (size_t i = 0; i < size; i++) {
+  //    sif::info << "Byte " << i + 1 << ": 0b" << std::bitset<8>(data[i]) << std::endl;
+  //  }
+  //#else
+  //  for (size_t i = 0; i < size; i++) {
+  //    sif::printInfo("Byte %d: 0b" BYTE_TO_BINARY_PATTERN "\n", i + 1, BYTE_TO_BINARY(data[i]));
+  //  }
+  //#endif
 }
diff --git a/src/fsfw/health/HealthHelper.cpp b/src/fsfw/health/HealthHelper.cpp
index 4bef128c1..954a1e19d 100644
--- a/src/fsfw/health/HealthHelper.cpp
+++ b/src/fsfw/health/HealthHelper.cpp
@@ -35,20 +35,12 @@ ReturnValue_t HealthHelper::initialize() {
   eventSender = ObjectManager::instance()->get<EventReportingProxyIF>(objectId);
 
   if (healthTable == nullptr) {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::error << "HealthHelper::initialize: Health table object needs"
-                  "to be created in factory."
-               << std::endl;
-#endif
+    FSFW_LOGE("{}", "initialize: Health table object needs to be created in factory\n");
     return ObjectManagerIF::CHILD_INIT_FAILED;
   }
 
   if (eventSender == nullptr) {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::error << "HealthHelper::initialize: Owner has to implement "
-                  "ReportingProxyIF."
-               << std::endl;
-#endif
+    FSFW_LOGE("{}", "initialize: Owner has to implement ReportingProxyIF\n");
     return ObjectManagerIF::CHILD_INIT_FAILED;
   }
 
@@ -77,9 +69,7 @@ void HealthHelper::informParent(HasHealthIF::HealthState health,
   HealthMessage::setHealthMessage(&information, HealthMessage::HEALTH_INFO, health, oldHealth);
   if (MessageQueueSenderIF::sendMessage(parentQueue, &information, owner->getCommandQueue()) !=
       HasReturnvaluesIF::RETURN_OK) {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::debug << "HealthHelper::informParent: sending health reply failed." << std::endl;
-#endif
+    FSFW_LOGWT("informParent: Object ID {:#08x} | Sending health reply failed\n", objectId);
   }
 }
 
@@ -96,10 +86,7 @@ void HealthHelper::handleSetHealthCommand(CommandMessage* command) {
   }
   if (MessageQueueSenderIF::sendMessage(command->getSender(), &reply, owner->getCommandQueue()) !=
       HasReturnvaluesIF::RETURN_OK) {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::debug << "HealthHelper::handleHealthCommand: sending health "
-                  "reply failed."
-               << std::endl;
-#endif
+    FSFW_LOGWT("handleSetHealthCommand: Object ID {:#08x} | Sending health reply failed\n",
+               objectId);
   }
 }
diff --git a/src/fsfw/health/HealthTable.cpp b/src/fsfw/health/HealthTable.cpp
index ab4881f41..e9358bd7f 100644
--- a/src/fsfw/health/HealthTable.cpp
+++ b/src/fsfw/health/HealthTable.cpp
@@ -3,6 +3,7 @@
 #include "fsfw/ipc/MutexFactory.h"
 #include "fsfw/ipc/MutexGuard.h"
 #include "fsfw/serialize/SerializeAdapter.h"
+#include "fsfw/serviceinterface.h"
 
 HealthTable::HealthTable(object_id_t objectid) : SystemObject(objectid) {
   mutex = MutexFactory::instance()->createMutex();
@@ -68,13 +69,7 @@ void HealthTable::printAll(uint8_t* pointer, size_t maxSize) {
   ReturnValue_t result =
       SerializeAdapter::serialize(&count, &pointer, &size, maxSize, SerializeIF::Endianness::BIG);
   if (result != HasReturnvaluesIF::RETURN_OK) {
-#if FSFW_VERBOSE_LEVEL >= 1
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::warning << "HealthTable::printAll: Serialization of health table failed" << std::endl;
-#else
-    sif::printWarning("HealthTable::printAll: Serialization of health table failed\n");
-#endif
-#endif /* FSFW_VERBOSE_LEVEL >= 1 */
+    FSFW_LOGW("{}", "printAll: Serialization of health table failed\n");
     return;
   }
   for (const auto& health : healthMap) {
diff --git a/src/fsfw/ipc/MessageQueueMessage.cpp b/src/fsfw/ipc/MessageQueueMessage.cpp
index 6899915ac..bbaddda1a 100644
--- a/src/fsfw/ipc/MessageQueueMessage.cpp
+++ b/src/fsfw/ipc/MessageQueueMessage.cpp
@@ -3,7 +3,7 @@
 #include <cstring>
 
 #include "fsfw/globalfunctions/arrayprinter.h"
-#include "fsfw/serviceinterface/ServiceInterface.h"
+#include "fsfw/serviceinterface.h"
 
 MessageQueueMessage::MessageQueueMessage() : messageSize(getMinimumMessageSize()) {
   memset(this->internalBuffer, 0, sizeof(this->internalBuffer));
@@ -15,11 +15,7 @@ MessageQueueMessage::MessageQueueMessage(uint8_t* data, size_t size)
     memcpy(this->getData(), data, size);
     this->messageSize = this->HEADER_SIZE + size;
   } else {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::warning << "MessageQueueMessage: Passed size larger than maximum"
-                    "allowed size! Setting content to 0"
-                 << std::endl;
-#endif
+    FSFW_LOGW("{}", "ctor: Passed size larger than maximum allowed size! Setting content to 0\n");
     memset(this->internalBuffer, 0, sizeof(this->internalBuffer));
     this->messageSize = this->HEADER_SIZE;
   }
diff --git a/src/fsfw/ipc/MutexGuard.h b/src/fsfw/ipc/MutexGuard.h
index f7b906633..e9c15c0e5 100644
--- a/src/fsfw/ipc/MutexGuard.h
+++ b/src/fsfw/ipc/MutexGuard.h
@@ -1,8 +1,10 @@
 #ifndef FRAMEWORK_IPC_MUTEXGUARD_H_
 #define FRAMEWORK_IPC_MUTEXGUARD_H_
 
-#include "../serviceinterface/ServiceInterface.h"
-#include "MutexFactory.h"
+#include <fmt/core.h>
+
+#include "fsfw/ipc/MutexIF.h"
+#include "fsfw/serviceinterface.h"
 
 class MutexGuard {
  public:
@@ -10,35 +12,17 @@ class MutexGuard {
              uint32_t timeoutMs = 0)
       : internalMutex(mutex) {
     if (mutex == nullptr) {
-#if FSFW_VERBOSE_LEVEL >= 1
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-      sif::error << "MutexGuard: Passed mutex is invalid!" << std::endl;
-#else
-      sif::printError("MutexGuard: Passed mutex is invalid!\n");
-#endif /* FSFW_CPP_OSTREAM_ENABLED == 1 */
-#endif /* FSFW_VERBOSE_LEVEL >= 1 */
+      // It's tricky to use the error functions defined in the service interface
+      // because those functions require the mutex guard themselves
+      fmt::print("ERROR | Passed mutex is invalid\n");
       return;
     }
     result = mutex->lockMutex(timeoutType, timeoutMs);
-#if FSFW_VERBOSE_LEVEL >= 1
     if (result == MutexIF::MUTEX_TIMEOUT) {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-      sif::error << "MutexGuard: Lock of mutex failed with timeout of " << timeoutMs
-                 << " milliseconds!" << std::endl;
-#else
-      sif::printError("MutexGuard: Lock of mutex failed with timeout of %lu milliseconds\n",
-                      timeoutMs);
-#endif /* FSFW_CPP_OSTREAM_ENABLED == 1 */
-
+      fmt::print("ERROR | Lock of mutex failed with timeout of {} milliseconds\n", timeoutMs);
     } else if (result != HasReturnvaluesIF::RETURN_OK) {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-      sif::error << "MutexGuard: Lock of Mutex failed with code " << result << std::endl;
-#else
-      sif::printError("MutexGuard: Lock of Mutex failed with code %d\n", result);
-#endif /* FSFW_CPP_OSTREAM_ENABLED == 1 */
+      fmt::print("ERROR | Lock of Mutex failed with code {}\n", result);
     }
-#else
-#endif /* FSFW_VERBOSE_LEVEL >= 1 */
   }
 
   ReturnValue_t getLockResult() const { return result; }
diff --git a/src/fsfw/memory/MemoryHelper.cpp b/src/fsfw/memory/MemoryHelper.cpp
index 462a818e9..34cd30171 100644
--- a/src/fsfw/memory/MemoryHelper.cpp
+++ b/src/fsfw/memory/MemoryHelper.cpp
@@ -4,7 +4,7 @@
 #include "fsfw/memory/MemoryMessage.h"
 #include "fsfw/objectmanager/ObjectManager.h"
 #include "fsfw/serialize/EndianConverter.h"
-#include "fsfw/serviceinterface/ServiceInterface.h"
+#include "fsfw/serviceinterface.h"
 
 MemoryHelper::MemoryHelper(HasMemoryIF* workOnThis, MessageQueueIF* useThisQueue)
     : workOnThis(workOnThis),
@@ -17,9 +17,7 @@ ReturnValue_t MemoryHelper::handleMemoryCommand(CommandMessage* message) {
   lastSender = message->getSender();
   lastCommand = message->getCommand();
   if (busy) {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::debug << "MemHelper: Busy!" << std::endl;
-#endif
+    FSFW_LOGW("{}", "MemoryHelper: Busy\n");
   }
   switch (lastCommand) {
     case MemoryMessage::CMD_MEMORY_DUMP:
diff --git a/src/fsfw/monitoring/MonitoringMessageContent.h b/src/fsfw/monitoring/MonitoringMessageContent.h
index fb3ace3da..ebb473988 100644
--- a/src/fsfw/monitoring/MonitoringMessageContent.h
+++ b/src/fsfw/monitoring/MonitoringMessageContent.h
@@ -81,11 +81,7 @@ class MonitoringReportContent : public SerialLinkedListAdapter<SerializeIF> {
     if (timeStamper == nullptr) {
       timeStamper = ObjectManager::instance()->get<TimeStamperIF>(timeStamperId);
       if (timeStamper == nullptr) {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-        sif::error << "MonitoringReportContent::checkAndSetStamper: "
-                      "Stamper not found!"
-                   << std::endl;
-#endif
+        FSFW_LOGET("{}", "checkAndSetStamper: Stamper not found\n");
         return false;
       }
     }
diff --git a/src/fsfw/objectmanager/ObjectManager.cpp b/src/fsfw/objectmanager/ObjectManager.cpp
index 2017938a1..86fe8d182 100644
--- a/src/fsfw/objectmanager/ObjectManager.cpp
+++ b/src/fsfw/objectmanager/ObjectManager.cpp
@@ -1,6 +1,6 @@
-#include "fsfw/objectmanager/ObjectManager.h"
+#include "ObjectManager.h"
 
-#include "fsfw/serviceinterface/ServiceInterface.h"
+#include "fsfw/serviceinterface.h"
 
 #if FSFW_CPP_OSTREAM_ENABLED == 1
 #include <iomanip>
@@ -38,15 +38,8 @@ ReturnValue_t ObjectManager::insert(object_id_t id, SystemObjectIF* object) {
 #endif
     return this->RETURN_OK;
   } else {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::error << "ObjectManager::insert: Object ID " << std::hex << static_cast<uint32_t>(id)
-               << std::dec << " is already in use!" << std::endl;
-    sif::error << "Terminating program" << std::endl;
-#else
-    sif::printError("ObjectManager::insert: Object ID 0x%08x is already in use!\n",
-                    static_cast<unsigned int>(id));
-    sif::printError("Terminating program");
-#endif
+    FSFW_LOGET("ObjectManager::insert: Object ID {:#08x} is already in use\nTerminating program\n",
+               static_cast<uint32_t>(id));
     // This is very severe and difficult to handle in other places.
     std::exit(INSERTION_FAILED);
   }
@@ -61,10 +54,7 @@ ReturnValue_t ObjectManager::remove(object_id_t id) {
 #endif
     return RETURN_OK;
   } else {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::error << "ObjectManager::removeObject: Requested object " << std::hex << (int)id
-               << std::dec << " not found." << std::endl;
-#endif
+    FSFW_LOGW("removeObject: Requested object {:#08x} not found\n", id);
     return NOT_FOUND;
   }
 }
@@ -79,64 +69,44 @@ SystemObjectIF* ObjectManager::getSystemObject(object_id_t id) {
 }
 
 void ObjectManager::initialize() {
-  if (objectFactoryFunction == nullptr) {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::error << "ObjectManager::initialize: Passed produceObjects "
-                  "functions is nullptr!"
-               << std::endl;
-#else
-    sif::printError("ObjectManager::initialize: Passed produceObjects functions is nullptr!\n");
-#endif
-    return;
+  if (objectFactoryFunction != nullptr) {
+    objectFactoryFunction(factoryArgs);
   }
-  objectFactoryFunction(factoryArgs);
   ReturnValue_t result = RETURN_FAILED;
   uint32_t errorCount = 0;
   for (auto const& it : objectList) {
     result = it.second->initialize();
     if (result != RETURN_OK) {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
       object_id_t var = it.first;
-      sif::error << "ObjectManager::initialize: Object 0x" << std::hex << std::setw(8)
-                 << std::setfill('0') << var
-                 << " failed to "
-                    "initialize with code 0x"
-                 << result << std::dec << std::setfill(' ') << std::endl;
-#endif
+      FSFW_LOGWT("initialize: Object {:#08x} failed to initialize with code {:#04x}\n", var,
+                 result);
       errorCount++;
     }
   }
   if (errorCount > 0) {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::error << "ObjectManager::ObjectManager: Counted " << errorCount
-               << " failed initializations." << std::endl;
-#endif
+    FSFW_LOGWT("{}", "initialize: Counted failed initializations\n");
   }
   // Init was successful. Now check successful interconnections.
   errorCount = 0;
   for (auto const& it : objectList) {
     result = it.second->checkObjectConnections();
     if (result != RETURN_OK) {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-      sif::error << "ObjectManager::ObjectManager: Object 0x" << std::hex << (int)it.first
-                 << " connection check failed with code 0x" << result << std::dec << std::endl;
-#endif
+      FSFW_LOGE("initialize: Object {:#08x} connection check failed with code {:#04x}\n", it.first,
+                result);
       errorCount++;
     }
   }
   if (errorCount > 0) {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::error << "ObjectManager::ObjectManager: Counted " << errorCount
-               << " failed connection checks." << std::endl;
-#endif
+    FSFW_LOGE("{}", "ObjectManager::ObjectManager: Counted {} failed connection checks\n",
+              errorCount);
   }
 }
 
 void ObjectManager::printList() {
 #if FSFW_CPP_OSTREAM_ENABLED == 1
-  sif::debug << "ObjectManager: Object List contains:" << std::endl;
+  sif::info("ObjectManager: Object List contains:\n");
   for (auto const& it : objectList) {
-    sif::debug << std::hex << it.first << " | " << it.second << std::endl;
+    sif::info("{:#08x} | {:#08x}\n", it.first, it.second);
   }
 #endif
 }
diff --git a/src/fsfw/objectmanager/SystemObject.h b/src/fsfw/objectmanager/SystemObject.h
index eeb68b8fb..c541ac5ec 100644
--- a/src/fsfw/objectmanager/SystemObject.h
+++ b/src/fsfw/objectmanager/SystemObject.h
@@ -50,7 +50,8 @@ class SystemObject : public SystemObjectIF {
   virtual ReturnValue_t initialize() override;
   virtual ReturnValue_t checkObjectConnections() override;
 
-  virtual void forwardEvent(Event event, uint32_t parameter1 = 0, uint32_t parameter2 = 0) const override;
+  virtual void forwardEvent(Event event, uint32_t parameter1 = 0,
+                            uint32_t parameter2 = 0) const override;
 };
 
 #endif /* FSFW_OBJECTMANAGER_SYSTEMOBJECT_H_ */
diff --git a/src/fsfw/osal/common/UdpTcPollingTask.cpp b/src/fsfw/osal/common/UdpTcPollingTask.cpp
index 38fb19211..bcc8e9e33 100644
--- a/src/fsfw/osal/common/UdpTcPollingTask.cpp
+++ b/src/fsfw/osal/common/UdpTcPollingTask.cpp
@@ -154,7 +154,7 @@ void UdpTcPollingTask::setTimeout(double timeoutSeconds) {
 #endif
   }
 #elif defined(PLATFORM_UNIX)
-  timeval tval {};
+  timeval tval{};
   tval = timevalOperations::toTimeval(timeoutSeconds);
   int result = setsockopt(serverSocket, SOL_SOCKET, SO_RCVTIMEO, &tval, sizeof(receptionTimeout));
   if (result == -1) {
diff --git a/src/fsfw/osal/common/UdpTmTcBridge.cpp b/src/fsfw/osal/common/UdpTmTcBridge.cpp
index 6089f266a..e3cad58ff 100644
--- a/src/fsfw/osal/common/UdpTmTcBridge.cpp
+++ b/src/fsfw/osal/common/UdpTmTcBridge.cpp
@@ -20,7 +20,7 @@
 const std::string UdpTmTcBridge::DEFAULT_SERVER_PORT = tcpip::DEFAULT_SERVER_PORT;
 
 UdpTmTcBridge::UdpTmTcBridge(object_id_t objectId, object_id_t tcDestination,
-                             const std::string& udpServerPort_, object_id_t tmStoreId,
+                             const std::string &udpServerPort_, object_id_t tmStoreId,
                              object_id_t tcStoreId)
     : TmTcBridge(objectId, tcDestination, tmStoreId, tcStoreId) {
   if (udpServerPort_.empty()) {
@@ -118,7 +118,7 @@ ReturnValue_t UdpTmTcBridge::sendTm(const uint8_t *data, size_t dataLen) {
 #endif
 
   ssize_t bytesSent = sendto(serverSocket, reinterpret_cast<const char *>(data), dataLen, flags,
-                         &clientAddress, clientAddressLen);
+                             &clientAddress, clientAddressLen);
   if (bytesSent == SOCKET_ERROR) {
 #if FSFW_CPP_OSTREAM_ENABLED == 1
     sif::warning << "TmTcUdpBridge::sendTm: Send operation failed." << std::endl;
diff --git a/src/fsfw/osal/common/UdpTmTcBridge.h b/src/fsfw/osal/common/UdpTmTcBridge.h
index b0a67430f..92829c468 100644
--- a/src/fsfw/osal/common/UdpTmTcBridge.h
+++ b/src/fsfw/osal/common/UdpTmTcBridge.h
@@ -29,8 +29,8 @@ class UdpTmTcBridge : public TmTcBridge, public TcpIpBase {
   /* The ports chosen here should not be used by any other process. */
   static const std::string DEFAULT_SERVER_PORT;
 
-  UdpTmTcBridge(object_id_t objectId, object_id_t tcDestination, const std::string& udpServerPort = "",
-                object_id_t tmStoreId = objects::TM_STORE,
+  UdpTmTcBridge(object_id_t objectId, object_id_t tcDestination,
+                const std::string& udpServerPort = "", object_id_t tmStoreId = objects::TM_STORE,
                 object_id_t tcStoreId = objects::TC_STORE);
   ~UdpTmTcBridge() override;
 
diff --git a/src/fsfw/osal/linux/tcpipHelpers.cpp b/src/fsfw/osal/linux/tcpipHelpers.cpp
index 2ae9bc8ab..aee7bd798 100644
--- a/src/fsfw/osal/linux/tcpipHelpers.cpp
+++ b/src/fsfw/osal/linux/tcpipHelpers.cpp
@@ -1,10 +1,9 @@
 #include "fsfw/osal/common/tcpipHelpers.h"
 
-#include <errno.h>
-
+#include <cerrno>
 #include <string>
 
-#include "fsfw/serviceinterface/ServiceInterface.h"
+#include "fsfw/serviceinterface.h"
 #include "fsfw/tasks/TaskFactory.h"
 
 void tcpip::handleError(Protocol protocol, ErrorSources errorSrc, dur_millis_t sleepDuration) {
@@ -97,14 +96,13 @@ void tcpip::handleError(Protocol protocol, ErrorSources errorSrc, dur_millis_t s
   }
 
 #if FSFW_CPP_OSTREAM_ENABLED == 1
-  sif::warning << "tcpip::handleError: " << protocolString << " | " << errorSrcString << " | "
-               << infoString << std::endl;
+  FSFW_LOGWT("tcpip::handleError: {} | {} | {}\n", protocolString, errorSrcString, infoString);
 #else
   sif::printWarning("tcpip::handleError: %s | %s | %s\n", protocolString.c_str(),
                     errorSrcString.c_str(), infoString.c_str());
 #endif /* FSFW_CPP_OSTREAM_ENABLED == 1 */
 
   if (sleepDuration > 0) {
-    TaskFactory::instance()->delayTask(sleepDuration);
+    TaskFactory::delayTask(sleepDuration);
   }
 }
diff --git a/src/fsfw/parameters/ParameterHelper.cpp b/src/fsfw/parameters/ParameterHelper.cpp
index 58356af56..e5c0357f5 100644
--- a/src/fsfw/parameters/ParameterHelper.cpp
+++ b/src/fsfw/parameters/ParameterHelper.cpp
@@ -2,6 +2,7 @@
 
 #include "fsfw/objectmanager/ObjectManager.h"
 #include "fsfw/parameters/ParameterMessage.h"
+#include "fsfw/serviceinterface.h"
 
 ParameterHelper::ParameterHelper(ReceivesParameterMessagesIF* owner) : owner(owner) {}
 
@@ -43,10 +44,9 @@ ReturnValue_t ParameterHelper::handleParameterMessage(CommandMessage* message) {
       ConstStorageAccessor accessor(storeId);
       result = storage->getData(storeId, accessor);
       if (result != HasReturnvaluesIF::RETURN_OK) {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-        sif::error << "ParameterHelper::handleParameterMessage: Getting"
-                   << " store data failed for load command." << std::endl;
-#endif
+        FSFW_LOGE("{}",
+                  "ParameterHelper::handleParameterMessage: Getting store data failed for "
+                  "load command\n");
         break;
       }
 
diff --git a/src/fsfw/parameters/ParameterWrapper.cpp b/src/fsfw/parameters/ParameterWrapper.cpp
index 27552290e..111facf2e 100644
--- a/src/fsfw/parameters/ParameterWrapper.cpp
+++ b/src/fsfw/parameters/ParameterWrapper.cpp
@@ -1,7 +1,7 @@
 #include "fsfw/parameters/ParameterWrapper.h"
 
 #include "fsfw/FSFW.h"
-#include "fsfw/serviceinterface/ServiceInterface.h"
+#include "fsfw/serviceinterface.h"
 
 ParameterWrapper::ParameterWrapper() : pointsToStream(false), type(Type::UNKNOWN_TYPE) {}
 
@@ -209,47 +209,23 @@ ReturnValue_t ParameterWrapper::set(const uint8_t *stream, size_t streamSize,
 ReturnValue_t ParameterWrapper::copyFrom(const ParameterWrapper *from,
                                          uint16_t startWritingAtIndex) {
   if (data == nullptr) {
-#if FSFW_VERBOSE_LEVEL >= 1
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::warning << "ParameterWrapper::copyFrom: Called on read-only variable!" << std::endl;
-#else
-    sif::printWarning("ParameterWrapper::copyFrom: Called on read-only variable!\n");
-#endif
-#endif /* FSFW_VERBOSE_LEVEL >= 1 */
+    FSFW_LOGWT("{}", "copyFrom: Called on read-only variable\n");
     return READONLY;
   }
 
   if (from->readonlyData == nullptr) {
-#if FSFW_VERBOSE_LEVEL >= 1
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::warning << "ParameterWrapper::copyFrom: Source not set!" << std::endl;
-#else
-    sif::printWarning("ParameterWrapper::copyFrom: Source not set!\n");
-#endif
-#endif /* FSFW_VERBOSE_LEVEL >= 1 */
+    FSFW_LOGWT("{}", "copyFrom: Source not set\n");
     return SOURCE_NOT_SET;
   }
 
   if (type != from->type) {
-#if FSFW_VERBOSE_LEVEL >= 1
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::warning << "ParameterWrapper::copyFrom: Datatype missmatch!" << std::endl;
-#else
-    sif::printWarning("ParameterWrapper::copyFrom: Datatype missmatch!\n");
-#endif
-#endif /* FSFW_VERBOSE_LEVEL >= 1 */
+    FSFW_LOGW("{}", "copyFrom: Datatype missmatch\n");
     return DATATYPE_MISSMATCH;
   }
 
   // The smallest allowed value for rows and columns is one.
   if (rows == 0 or columns == 0) {
-#if FSFW_VERBOSE_LEVEL >= 1
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::warning << "ParameterWrapper::copyFrom: Columns or rows zero!" << std::endl;
-#else
-    sif::printWarning("ParameterWrapper::copyFrom: Columns or rows zero!\n");
-#endif
-#endif /* FSFW_VERBOSE_LEVEL >= 1 */
+    FSFW_LOGW("{}", "ParameterWrapper::copyFrom: Columns or rows zero\n");
     return COLUMN_OR_ROWS_ZERO;
   }
 
diff --git a/src/fsfw/serialize/SerialBufferAdapter.cpp b/src/fsfw/serialize/SerialBufferAdapter.cpp
index 83129982b..86c0898ab 100644
--- a/src/fsfw/serialize/SerialBufferAdapter.cpp
+++ b/src/fsfw/serialize/SerialBufferAdapter.cpp
@@ -2,7 +2,7 @@
 
 #include <cstring>
 
-#include "fsfw/serviceinterface/ServiceInterface.h"
+#include "fsfw/serviceinterface.h"
 
 template <typename count_t>
 SerialBufferAdapter<count_t>::SerialBufferAdapter(const uint8_t* buffer, count_t bufferLength,
@@ -95,11 +95,7 @@ ReturnValue_t SerialBufferAdapter<count_t>::deSerialize(const uint8_t** buffer,
 template <typename count_t>
 uint8_t* SerialBufferAdapter<count_t>::getBuffer() {
   if (buffer == nullptr) {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::error << "Wrong access function for stored type !"
-                  " Use getConstBuffer()."
-               << std::endl;
-#endif
+    FSFW_LOGW("{}", "getBuffer: Wrong access function for stored type. Use getConstBuffer\n");
     return nullptr;
   }
   return buffer;
@@ -108,11 +104,7 @@ uint8_t* SerialBufferAdapter<count_t>::getBuffer() {
 template <typename count_t>
 const uint8_t* SerialBufferAdapter<count_t>::getConstBuffer() const {
   if (constBuffer == nullptr) {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::error << "SerialBufferAdapter::getConstBuffer:"
-                  " Buffers are unitialized!"
-               << std::endl;
-#endif
+    FSFW_LOGE("{}", "getConstBuffer: Buffers are unitialized\n");
     return nullptr;
   }
   return constBuffer;
diff --git a/src/fsfw/serviceinterface.h b/src/fsfw/serviceinterface.h
index 2e9a0b7e4..998d3d502 100644
--- a/src/fsfw/serviceinterface.h
+++ b/src/fsfw/serviceinterface.h
@@ -1,6 +1,7 @@
 #ifndef FSFW_SRC_FSFW_SERVICEINTERFACE_H_
 #define FSFW_SRC_FSFW_SERVICEINTERFACE_H_
 
-#include "serviceinterface/ServiceInterface.h"
+#include "serviceinterface/fmtWrapper.h"
+//#include "serviceinterface/ServiceInterface.h"
 
 #endif /* FSFW_SRC_FSFW_SERVICEINTERFACE_H_ */
diff --git a/src/fsfw/serviceinterface/ServiceInterfaceStream.h b/src/fsfw/serviceinterface/ServiceInterfaceStream.h
index 0b3d67450..db429dad7 100644
--- a/src/fsfw/serviceinterface/ServiceInterfaceStream.h
+++ b/src/fsfw/serviceinterface/ServiceInterfaceStream.h
@@ -57,10 +57,10 @@ class ServiceInterfaceStream : public std::ostream {
 // Forward declaration of interface streams. These should be instantiated in
 // main. They can then be used like std::cout or std::cerr.
 namespace sif {
-extern ServiceInterfaceStream debug;
-extern ServiceInterfaceStream info;
-extern ServiceInterfaceStream warning;
-extern ServiceInterfaceStream error;
+// extern ServiceInterfaceStream debug;
+// extern ServiceInterfaceStream info;
+// extern ServiceInterfaceStream warning;
+// extern ServiceInterfaceStream error;
 }  // namespace sif
 
 #endif /* FSFW_CPP_OSTREAM_ENABLED == 1 */
diff --git a/src/fsfw/serviceinterface/fmtWrapper.cpp b/src/fsfw/serviceinterface/fmtWrapper.cpp
index ca9608808..36b89d2dd 100644
--- a/src/fsfw/serviceinterface/fmtWrapper.cpp
+++ b/src/fsfw/serviceinterface/fmtWrapper.cpp
@@ -5,11 +5,11 @@
 std::array<char, 524> sif::PRINT_BUF = {};
 MutexIF* sif::PRINT_MUTEX = nullptr;
 
-const char* sif::PREFIX_ARR[4]= {DEBUG_PREFIX, INFO_PREFIX, WARNING_PREFIX, ERROR_PREFIX};
+const char* sif::PREFIX_ARR[4] = {DEBUG_PREFIX, INFO_PREFIX, WARNING_PREFIX, ERROR_PREFIX};
 
 ReturnValue_t sif::initialize() {
   sif::PRINT_MUTEX = MutexFactory::instance()->createMutex();
-  if(sif::PRINT_MUTEX == nullptr) {
+  if (sif::PRINT_MUTEX == nullptr) {
     return HasReturnvaluesIF::RETURN_FAILED;
   }
   return HasReturnvaluesIF::RETURN_OK;
diff --git a/src/fsfw/serviceinterface/fmtWrapper.h b/src/fsfw/serviceinterface/fmtWrapper.h
index 9b957512f..c0881cb15 100644
--- a/src/fsfw/serviceinterface/fmtWrapper.h
+++ b/src/fsfw/serviceinterface/fmtWrapper.h
@@ -8,7 +8,6 @@
 #include <array>
 #include <cstdint>
 
-#include "fsfw/ipc/MutexGuard.h"
 #include "fsfw/ipc/MutexIF.h"
 #include "fsfw/timemanager/Clock.h"
 
@@ -44,12 +43,16 @@ size_t writeTypePrefix(LogLevel level);
 template <typename... T>
 size_t logTraced(LogLevel level, const char* file, unsigned int line, bool timed,
                  fmt::format_string<T...> fmt, T&&... args) noexcept {
-  if(PRINT_MUTEX == nullptr) {
+  if (PRINT_MUTEX == nullptr) {
     fmt::print("Please call sif::initialize at program startup\n");
     return 0;
   }
   try {
-    MutexGuard mg(PRINT_MUTEX);
+    auto fsfwret = PRINT_MUTEX->lockMutex();
+    if (fsfwret != HasReturnvaluesIF::RETURN_OK) {
+      fmt::print("ERROR | {} | Locking print mutex failed", __FILENAME__);
+      return 0;
+    }
     size_t bufPos = writeTypePrefix(level);
     auto currentIter = PRINT_BUF.begin() + bufPos;
     if (timed) {
@@ -61,27 +64,34 @@ size_t logTraced(LogLevel level, const char* file, unsigned int line, bool timed
                                            logTime.usecond / 1000, fmt::format(fmt, args...));
       bufPos += result.size;
     } else {
-      const auto result = fmt::format_to_n(currentIter, PRINT_BUF.size() - 1 - bufPos,
-                                           " | {}[l.{}] | {}", file, line, fmt::format(fmt, args...));
+      const auto result =
+          fmt::format_to_n(currentIter, PRINT_BUF.size() - 1 - bufPos, " | {}[l.{}] | {}", file,
+                           line, fmt::format(fmt, args...));
       bufPos += result.size;
     }
     PRINT_BUF[bufPos] = '\0';
     fmt::print(fmt::runtime(PRINT_BUF.data()));
+    PRINT_MUTEX->unlockMutex();
     return bufPos;
   } catch (const fmt::v8::format_error& e) {
     fmt::print("Printing failed with error: {}\n", e.what());
+    PRINT_MUTEX->unlockMutex();
     return 0;
   }
 }
 
 template <typename... T>
 size_t log(LogLevel level, bool timed, fmt::format_string<T...> fmt, T&&... args) noexcept {
-  if(PRINT_MUTEX == nullptr) {
+  if (PRINT_MUTEX == nullptr) {
     fmt::print("Please call sif::initialize at program startup\n");
     return 0;
   }
   try {
-    MutexGuard mg(PRINT_MUTEX);
+    auto fsfwret = PRINT_MUTEX->lockMutex();
+    if (fsfwret != HasReturnvaluesIF::RETURN_OK) {
+      fmt::print("ERROR | {} | Locking print mutex failed", __FILENAME__);
+      return 0;
+    }
     size_t bufPos = writeTypePrefix(level);
     auto currentIter = PRINT_BUF.begin() + bufPos;
     if (timed) {
@@ -92,73 +102,101 @@ size_t log(LogLevel level, bool timed, fmt::format_string<T...> fmt, T&&... args
           logTime.minute, logTime.second, logTime.usecond / 1000, fmt::format(fmt, args...));
       bufPos += result.size;
     } else {
-      const auto result = fmt::format_to_n(
-          currentIter, PRINT_BUF.size() - bufPos, " | {}", fmt::format(fmt, args...));
+      const auto result = fmt::format_to_n(currentIter, PRINT_BUF.size() - bufPos, " | {}",
+                                           fmt::format(fmt, args...));
       bufPos += result.size;
     }
     PRINT_BUF[bufPos] = '\0';
     fmt::print(fmt::runtime(PRINT_BUF.data()));
+    PRINT_MUTEX->unlockMutex();
     return bufPos;
   } catch (const fmt::v8::format_error& e) {
+    PRINT_MUTEX->unlockMutex();
     fmt::print("Printing failed with error: {}\n", e.what());
     return 0;
   }
 }
 
 template <typename... T>
-void fdebug(const char* file, unsigned int line, fmt::format_string<T...> fmt, T&&... args) noexcept {
+void debug(const char* file, unsigned int line, fmt::format_string<T...> fmt,
+           T&&... args) noexcept {
   logTraced(LogLevel::DEBUG, file, line, false, fmt, args...);
 }
 
 template <typename... T>
-void fdebug_t(const char* file, unsigned int line, fmt::format_string<T...> fmt, T&&... args) noexcept {
+void debug_t(const char* file, unsigned int line, fmt::format_string<T...> fmt,
+             T&&... args) noexcept {
   logTraced(LogLevel::DEBUG, file, line, true, fmt, args...);
 }
 
 template <typename... T>
-void finfo_t(fmt::format_string<T...> fmt, T&&... args) {
+void info_t(fmt::format_string<T...> fmt, T&&... args) {
   log(LogLevel::INFO, true, fmt, args...);
 }
 
 template <typename... T>
-void finfo(fmt::format_string<T...> fmt, T&&... args) {
+void info(fmt::format_string<T...> fmt, T&&... args) {
   log(LogLevel::INFO, false, fmt, args...);
 }
 
 template <typename... T>
-void fwarning(const char* file, unsigned int line, fmt::format_string<T...> fmt, T&&... args) {
+void warning(fmt::format_string<T...> fmt, T&&... args) {
+  log(LogLevel::ERROR, false, fmt, args...);
+}
+
+template <typename... T>
+void warning_t(fmt::format_string<T...> fmt, T&&... args) {
+  log(LogLevel::ERROR, true, fmt, args...);
+}
+
+template <typename... T>
+void warning_f(const char* file, unsigned int line, fmt::format_string<T...> fmt, T&&... args) {
   logTraced(LogLevel::WARNING, file, line, false, fmt, args...);
 }
 
 template <typename... T>
-void fwarning_t(const char* file, unsigned int line, fmt::format_string<T...> fmt, T&&... args) {
+void warning_ft(const char* file, unsigned int line, fmt::format_string<T...> fmt, T&&... args) {
   logTraced(LogLevel::WARNING, file, line, true, fmt, args...);
 }
 
 template <typename... T>
-void ferror(const char* file, unsigned int line, fmt::format_string<T...> fmt, T&&... args) {
+void error(fmt::format_string<T...> fmt, T&&... args) {
+  log(LogLevel::ERROR, false, fmt, args...);
+}
+
+template <typename... T>
+void error_t(fmt::format_string<T...> fmt, T&&... args) {
+  log(LogLevel::ERROR, true, fmt, args...);
+}
+
+template <typename... T>
+void error_f(const char* file, unsigned int line, fmt::format_string<T...> fmt, T&&... args) {
   logTraced(LogLevel::ERROR, file, line, false, fmt, args...);
 }
 
 template <typename... T>
-void ferror_t(const char* file, unsigned int line, fmt::format_string<T...> fmt, T&&... args) {
+void error_ft(const char* file, unsigned int line, fmt::format_string<T...> fmt, T&&... args) {
   logTraced(LogLevel::ERROR, file, line, true, fmt, args...);
 }
 
 }  // namespace sif
 
-#define FSFW_LOGI(format, ...) finfo(FMT_STRING(format), __VA_ARGS__)
+#define FSFW_LOGI(format, ...) sif::info(FMT_STRING(format), __VA_ARGS__)
 
-#define FSFW_LOGIT(format, ...) finfo_t(FMT_STRING(format), __VA_ARGS__)
+#define FSFW_LOGIT(format, ...) sif::info_t(FMT_STRING(format), __VA_ARGS__)
 
-#define FSFW_LOGD(format, ...) sif::fdebug(__FILENAME__, __LINE__, FMT_STRING(format), __VA_ARGS__)
+#define FSFW_LOGD(format, ...) sif::debug(__FILENAME__, __LINE__, FMT_STRING(format), __VA_ARGS__)
 
-#define FSFW_LOGDT(format, ...) fdebug_t(__FILENAME__, __LINE__, FMT_STRING(format), __VA_ARGS__)
+#define FSFW_LOGDT(format, ...) \
+  sif::debug_t(__FILENAME__, __LINE__, FMT_STRING(format), __VA_ARGS__)
 
-#define FSFW_LOGW(format, ...) fdebug(__FILENAME__, __LINE__, FMT_STRING(format), __VA_ARGS__)
+#define FSFW_LOGW(format, ...) \
+  sif::warning_f(__FILENAME__, __LINE__, FMT_STRING(format), __VA_ARGS__)
 
-#define FSFW_LOGWT(format, ...) fdebug_t(__FILENAME__, __LINE__, FMT_STRING(format), __VA_ARGS__)
+#define FSFW_LOGWT(format, ...) \
+  sif::warning_ft(__FILENAME__, __LINE__, FMT_STRING(format), __VA_ARGS__)
 
-#define FSFW_LOGE(format, ...) fdebug(__FILENAME__, __LINE__, FMT_STRING(format), __VA_ARGS__)
+#define FSFW_LOGE(format, ...) sif::error_f(__FILENAME__, __LINE__, FMT_STRING(format), __VA_ARGS__)
 
-#define FSFW_LOGET(format, ...) fdebug_t(__FILENAME__, __LINE__, FMT_STRING(format), __VA_ARGS__)
+#define FSFW_LOGET(format, ...) \
+  sif::error_ft(__FILENAME__, __LINE__, FMT_STRING(format), __VA_ARGS__)
diff --git a/src/fsfw/storagemanager/ConstStorageAccessor.cpp b/src/fsfw/storagemanager/ConstStorageAccessor.cpp
index df2fc7507..6cf99b78b 100644
--- a/src/fsfw/storagemanager/ConstStorageAccessor.cpp
+++ b/src/fsfw/storagemanager/ConstStorageAccessor.cpp
@@ -3,7 +3,7 @@
 #include <algorithm>
 
 #include "fsfw/globalfunctions/arrayprinter.h"
-#include "fsfw/serviceinterface/ServiceInterfaceStream.h"
+#include "fsfw/serviceinterface.h"
 #include "fsfw/storagemanager/StorageManagerIF.h"
 
 ConstStorageAccessor::ConstStorageAccessor(store_address_t storeId) : storeId(storeId) {}
@@ -46,18 +46,14 @@ const uint8_t* ConstStorageAccessor::data() const { return constDataPointer; }
 
 size_t ConstStorageAccessor::size() const {
   if (internalState == AccessState::UNINIT) {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::warning << "StorageAccessor: Not initialized!" << std::endl;
-#endif
+    FSFW_LOGW("{}", "size: Not initialized\n");
   }
   return size_;
 }
 
 ReturnValue_t ConstStorageAccessor::getDataCopy(uint8_t* pointer, size_t maxSize) {
   if (internalState == AccessState::UNINIT) {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::warning << "StorageAccessor: Not initialized!" << std::endl;
-#endif
+    FSFW_LOGW("{}", "getDataCopy: Not initialized\n");
     return HasReturnvaluesIF::RETURN_FAILED;
   }
   if (size_ > maxSize) {
diff --git a/src/fsfw/storagemanager/LocalPool.cpp b/src/fsfw/storagemanager/LocalPool.cpp
index cee1d4070..44e8e818f 100644
--- a/src/fsfw/storagemanager/LocalPool.cpp
+++ b/src/fsfw/storagemanager/LocalPool.cpp
@@ -4,6 +4,7 @@
 
 #include "fsfw/FSFW.h"
 #include "fsfw/objectmanager/ObjectManager.h"
+#include "fsfw/serviceinterface.h"
 
 LocalPool::LocalPool(object_id_t setObjectId, const LocalPoolConfig& poolConfig, bool registered,
                      bool spillsToHigherPools)
@@ -11,10 +12,7 @@ LocalPool::LocalPool(object_id_t setObjectId, const LocalPoolConfig& poolConfig,
       NUMBER_OF_SUBPOOLS(poolConfig.size()),
       spillsToHigherPools(spillsToHigherPools) {
   if (NUMBER_OF_SUBPOOLS == 0) {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::error << "LocalPool::LocalPool: Passed pool configuration is "
-               << " invalid!" << std::endl;
-#endif
+    FSFW_LOGW("{}", "ctor: Passed pool configuration is invalid, 0 subpools\n");
   }
   max_subpools_t index = 0;
   for (const auto& currentPoolConfig : poolConfig) {
@@ -127,9 +125,8 @@ ReturnValue_t LocalPool::deleteData(store_address_t storeId) {
     sizeLists[storeId.poolIndex][storeId.packetIndex] = STORAGE_FREE;
   } else {
     // pool_index or packet_index is too large
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::error << "LocalPool::deleteData: Illegal store ID, no deletion!" << std::endl;
-#endif
+    FSFW_LOGWT("Object ID {} | deleteData: Illegal store ID, no deletion\n",
+               SystemObject::getObjectId());
     status = ILLEGAL_STORAGE_ID;
   }
   return status;
@@ -178,11 +175,10 @@ ReturnValue_t LocalPool::initialize() {
   // Check if any pool size is large than the maximum allowed.
   for (uint8_t count = 0; count < NUMBER_OF_SUBPOOLS; count++) {
     if (elementSizes[count] >= STORAGE_FREE) {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-      sif::error << "LocalPool::initialize: Pool is too large! "
-                    "Max. allowed size is: "
-                 << (STORAGE_FREE - 1) << std::endl;
-#endif
+      FSFW_LOGW(
+          "LocalPool::initialize: Pool is too large- "
+          "Max. allowed size is: {}\n",
+          STORAGE_FREE - 1);
       return StorageManagerIF::POOL_TOO_LARGE;
     }
   }
@@ -203,10 +199,7 @@ ReturnValue_t LocalPool::reserveSpace(const size_t size, store_address_t* storeI
                                       bool ignoreFault) {
   ReturnValue_t status = getSubPoolIndex(size, &storeId->poolIndex);
   if (status != RETURN_OK) {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::error << "LocalPool( " << std::hex << getObjectId() << std::dec
-               << " )::reserveSpace: Packet too large." << std::endl;
-#endif
+    FSFW_LOGW("ID {:#08x} | reserveSpace: Packet too large\n", SystemObject::getObjectId());
     return status;
   }
   status = findEmpty(storeId->poolIndex, &storeId->packetIndex);
diff --git a/src/fsfw/storagemanager/StorageAccessor.cpp b/src/fsfw/storagemanager/StorageAccessor.cpp
index e2b083b21..ae1418490 100644
--- a/src/fsfw/storagemanager/StorageAccessor.cpp
+++ b/src/fsfw/storagemanager/StorageAccessor.cpp
@@ -2,7 +2,7 @@
 
 #include <algorithm>
 
-#include "fsfw/serviceinterface/ServiceInterface.h"
+#include "fsfw/serviceinterface.h"
 #include "fsfw/storagemanager/StorageManagerIF.h"
 
 StorageAccessor::StorageAccessor(store_address_t storeId) : ConstStorageAccessor(storeId) {}
@@ -23,9 +23,7 @@ StorageAccessor::StorageAccessor(StorageAccessor&& other)
 
 ReturnValue_t StorageAccessor::getDataCopy(uint8_t* pointer, size_t maxSize) {
   if (internalState == AccessState::UNINIT) {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::warning << "StorageAccessor: Not initialized!" << std::endl;
-#endif
+    FSFW_LOGW("{}", "getDataCopy: Not initialized\n");
     return HasReturnvaluesIF::RETURN_FAILED;
   }
   if (size_ > maxSize) {
diff --git a/src/fsfw/tasks/FixedSlotSequence.cpp b/src/fsfw/tasks/FixedSlotSequence.cpp
index d4c67b4da..81f40bdec 100644
--- a/src/fsfw/tasks/FixedSlotSequence.cpp
+++ b/src/fsfw/tasks/FixedSlotSequence.cpp
@@ -2,7 +2,7 @@
 
 #include <cstdlib>
 
-#include "fsfw/serviceinterface/ServiceInterface.h"
+#include "fsfw/serviceinterface.h"
 #include "fsfw/tasks/FixedTimeslotTaskIF.h"
 
 FixedSlotSequence::FixedSlotSequence(uint32_t setLengthMs) : lengthMs(setLengthMs) {
@@ -90,9 +90,7 @@ void FixedSlotSequence::addSlot(object_id_t componentId, uint32_t slotTimeMs, in
 
 ReturnValue_t FixedSlotSequence::checkSequence() const {
   if (slotList.empty()) {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::warning << "FixedSlotSequence::checkSequence: Slot list is empty!" << std::endl;
-#endif
+    FSFW_LOGW("{}", "FixedSlotSequence::checkSequence: Slot list is empty\n");
     return FixedTimeslotTaskIF::SLOT_LIST_EMPTY;
   }
 
@@ -100,10 +98,7 @@ ReturnValue_t FixedSlotSequence::checkSequence() const {
     ReturnValue_t result = customCheckFunction(slotList);
     if (result != HasReturnvaluesIF::RETURN_OK) {
       // Continue for now but print error output.
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-      sif::error << "FixedSlotSequence::checkSequence:"
-                 << " Custom check failed!" << std::endl;
-#endif
+      FSFW_LOGW("FixedSlotSequence::checkSequence: Custom check failed with result {}", result);
     }
   }
 
@@ -113,10 +108,8 @@ ReturnValue_t FixedSlotSequence::checkSequence() const {
     if (slot.executableObject == nullptr) {
       errorCount++;
     } else if (slot.pollingTimeMs < time) {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-      sif::error << "FixedSlotSequence::checkSequence: Time: " << slot.pollingTimeMs
-                 << " is smaller than previous with " << time << std::endl;
-#endif
+      FSFW_LOGET("FixedSlotSequence::checkSequence: Time {} is smaller than previous with {}\n",
+                 slot.pollingTimeMs, time);
       errorCount++;
     } else {
       // All ok, print slot.
@@ -151,11 +144,10 @@ ReturnValue_t FixedSlotSequence::intializeSequenceAfterTaskCreation() const {
     }
   }
   if (count > 0) {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::error << "FixedSlotSequence::intializeSequenceAfterTaskCreation:"
-                  "Counted "
-               << count << " failed initializations!" << std::endl;
-#endif
+    FSFW_LOGE(
+        "FixedSlotSequence::intializeSequenceAfterTaskCreation: Counted {} "
+        "failed initializations\n",
+        count);
     return HasReturnvaluesIF::RETURN_FAILED;
   }
   return HasReturnvaluesIF::RETURN_OK;
diff --git a/src/fsfw/tcdistribution/CCSDSDistributor.cpp b/src/fsfw/tcdistribution/CCSDSDistributor.cpp
index 3f4bbee34..3feed941d 100644
--- a/src/fsfw/tcdistribution/CCSDSDistributor.cpp
+++ b/src/fsfw/tcdistribution/CCSDSDistributor.cpp
@@ -1,7 +1,7 @@
 #include "fsfw/tcdistribution/CCSDSDistributor.h"
 
 #include "fsfw/objectmanager/ObjectManager.h"
-#include "fsfw/serviceinterface/ServiceInterface.h"
+#include "fsfw/serviceinterface.h"
 #include "fsfw/tmtcpacket/SpacePacketBase.h"
 
 #define CCSDS_DISTRIBUTOR_DEBUGGING 0
@@ -27,17 +27,7 @@ TcDistributor::TcMqMapIter CCSDSDistributor::selectDestination() {
   size_t size = 0;
   ReturnValue_t result = this->tcStore->getData(currentMessage.getStorageId(), &packet, &size);
   if (result != HasReturnvaluesIF::RETURN_OK) {
-#if FSFW_VERBOSE_LEVEL >= 1
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::error << "CCSDSDistributor::selectDestination: Getting data from"
-                  " store failed!"
-               << std::endl;
-#else
-    sif::printError(
-        "CCSDSDistributor::selectDestination: Getting data from"
-        " store failed!\n");
-#endif
-#endif
+    FSFW_LOGWT("{}", "selectDestination: Getting data from store failed");
   }
   SpacePacketBase currentPacket(packet);
 
diff --git a/src/fsfw/tcdistribution/CFDPDistributor.cpp b/src/fsfw/tcdistribution/CFDPDistributor.cpp
index d8be1543e..1b99dc449 100644
--- a/src/fsfw/tcdistribution/CFDPDistributor.cpp
+++ b/src/fsfw/tcdistribution/CFDPDistributor.cpp
@@ -21,13 +21,8 @@ CFDPDistributor::~CFDPDistributor() {}
 CFDPDistributor::TcMqMapIter CFDPDistributor::selectDestination() {
 #if FSFW_CFDP_DISTRIBUTOR_DEBUGGING == 1
   store_address_t storeId = this->currentMessage.getStorageId();
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-  sif::debug << "CFDPDistributor::handlePacket received: " << storeId.poolIndex << ", "
+  FSFW_LOGI("selectDestination: Recie" << storeId.poolIndex << ", "
              << storeId.packetIndex << std::endl;
-#else
-  sif::printDebug("CFDPDistributor::handlePacket received: %d, %d\n", storeId.poolIndex,
-                  storeId.packetIndex);
-#endif
 #endif
   TcMqMapIter queueMapIt = this->queueMap.end();
   if (this->currentPacket == nullptr) {
diff --git a/src/fsfw/tcdistribution/TcDistributor.cpp b/src/fsfw/tcdistribution/TcDistributor.cpp
index a650546c1..b9b3a999c 100644
--- a/src/fsfw/tcdistribution/TcDistributor.cpp
+++ b/src/fsfw/tcdistribution/TcDistributor.cpp
@@ -1,7 +1,7 @@
 #include "fsfw/tcdistribution/TcDistributor.h"
 
 #include "fsfw/ipc/QueueFactory.h"
-#include "fsfw/serviceinterface/ServiceInterface.h"
+#include "fsfw/serviceinterface.h"
 #include "fsfw/tmtcservices/TmTcMessage.h"
 
 TcDistributor::TcDistributor(object_id_t objectId) : SystemObject(objectId) {
@@ -33,14 +33,10 @@ ReturnValue_t TcDistributor::handlePacket() {
 }
 
 void TcDistributor::print() {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-  sif::debug << "Distributor content is: " << std::endl << "ID\t| Message Queue ID" << std::endl;
-  sif::debug << std::setfill('0') << std::setw(8) << std::hex;
+  FSFW_LOGI("{}", "Distributor content is:\nID\t| Message Queue ID");
   for (const auto& queueMapIter : queueMap) {
-    sif::debug << queueMapIter.first << "\t| 0x" << queueMapIter.second << std::endl;
+    FSFW_LOGI("{} \t| {:#08x}", queueMapIter.first, queueMapIter.second);
   }
-  sif::debug << std::setfill(' ') << std::dec;
-#endif
 }
 
 ReturnValue_t TcDistributor::callbackAfterSending(ReturnValue_t queueStatus) { return RETURN_OK; }
diff --git a/src/fsfw/timemanager/Stopwatch.cpp b/src/fsfw/timemanager/Stopwatch.cpp
index 05d5c0e8b..983c97134 100644
--- a/src/fsfw/timemanager/Stopwatch.cpp
+++ b/src/fsfw/timemanager/Stopwatch.cpp
@@ -1,6 +1,6 @@
 #include "fsfw/timemanager/Stopwatch.h"
 
-#include "fsfw/serviceinterface/ServiceInterface.h"
+#include "fsfw/serviceinterface.h"
 
 #if FSFW_CPP_OSTREAM_ENABLED == 1
 #include <iomanip>
@@ -29,22 +29,12 @@ double Stopwatch::stopSeconds() {
 
 void Stopwatch::display() {
   if (displayMode == StopwatchDisplayMode::MILLIS) {
-    dur_millis_t timeMillis =
+    auto timeMillis =
         static_cast<dur_millis_t>(elapsedTime.tv_sec * 1000 + elapsedTime.tv_usec / 1000);
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::info << "Stopwatch: Operation took " << timeMillis << " milliseconds" << std::endl;
-#else
-    sif::printInfo("Stopwatch: Operation took %lu milliseconds\n\r",
-                   static_cast<unsigned int>(timeMillis));
-#endif
+    FSFW_LOGIT("Stopwatch::display: {} ms elapsed\n", timeMillis);
   } else if (displayMode == StopwatchDisplayMode::SECONDS) {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::info << "Stopwatch: Operation took " << std::setprecision(3) << std::fixed
-              << timevalOperations::toDouble(elapsedTime) << " seconds" << std::endl;
-#else
-    sif::printInfo("Stopwatch: Operation took %.3f seconds\n\r",
-                   static_cast<float>(timevalOperations::toDouble(elapsedTime)));
-#endif
+    FSFW_LOGIT("Stopwatch::display: {} seconds elapsed\n",
+               static_cast<float>(timevalOperations::toDouble(elapsedTime)));
   }
 }
 
diff --git a/src/fsfw/tmtcpacket/SpacePacketBase.cpp b/src/fsfw/tmtcpacket/SpacePacketBase.cpp
index 756d7e508..891585937 100644
--- a/src/fsfw/tmtcpacket/SpacePacketBase.cpp
+++ b/src/fsfw/tmtcpacket/SpacePacketBase.cpp
@@ -2,7 +2,7 @@
 
 #include <cstring>
 
-#include "fsfw/serviceinterface/ServiceInterface.h"
+#include "fsfw/serviceinterface.h"
 
 SpacePacketBase::SpacePacketBase(const uint8_t* setAddress) {
   this->data = reinterpret_cast<SpacePacketPointer*>(const_cast<uint8_t*>(setAddress));
@@ -18,13 +18,7 @@ uint8_t SpacePacketBase::getPacketVersionNumber(void) {
 ReturnValue_t SpacePacketBase::initSpacePacketHeader(bool isTelecommand, bool hasSecondaryHeader,
                                                      uint16_t apid, uint16_t sequenceCount) {
   if (data == nullptr) {
-#if FSFW_VERBOSE_LEVEL >= 1
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::warning << "SpacePacketBase::initSpacePacketHeader: Data pointer is invalid" << std::endl;
-#else
-    sif::printWarning("SpacePacketBase::initSpacePacketHeader: Data pointer is invalid!\n");
-#endif
-#endif
+    FSFW_LOGWT("{}", "initSpacePacketHeader: Data pointer is invalid\n");
     return HasReturnvaluesIF::RETURN_FAILED;
   }
   // reset header to zero:
diff --git a/src/fsfw/tmtcpacket/cfdp/CFDPPacket.cpp b/src/fsfw/tmtcpacket/cfdp/CFDPPacket.cpp
index 5df50cd79..5f8957091 100644
--- a/src/fsfw/tmtcpacket/cfdp/CFDPPacket.cpp
+++ b/src/fsfw/tmtcpacket/cfdp/CFDPPacket.cpp
@@ -4,17 +4,13 @@
 
 #include "fsfw/globalfunctions/CRC.h"
 #include "fsfw/globalfunctions/arrayprinter.h"
-#include "fsfw/serviceinterface/ServiceInterface.h"
+#include "fsfw/serviceinterface.h"
 
 CFDPPacket::CFDPPacket(const uint8_t* setData) : SpacePacketBase(setData) {}
 
 CFDPPacket::~CFDPPacket() {}
 
 void CFDPPacket::print() {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-  sif::info << "CFDPPacket::print:" << std::endl;
-#else
-  sif::printInfo("CFDPPacket::print:\n");
-#endif
+  FSFW_LOGI("{}", "CFDPPacket::print:\n");
   arrayprinter::print(getWholeData(), getFullSize());
 }
diff --git a/src/fsfw/tmtcservices/PusServiceBase.cpp b/src/fsfw/tmtcservices/PusServiceBase.cpp
index 3af2b82ce..0786d2250 100644
--- a/src/fsfw/tmtcservices/PusServiceBase.cpp
+++ b/src/fsfw/tmtcservices/PusServiceBase.cpp
@@ -2,7 +2,7 @@
 
 #include "fsfw/ipc/QueueFactory.h"
 #include "fsfw/objectmanager/ObjectManager.h"
-#include "fsfw/serviceinterface/ServiceInterface.h"
+#include "fsfw/serviceinterface.h"
 #include "fsfw/tcdistribution/PUSDistributorIF.h"
 #include "fsfw/tmtcservices/AcceptsTelemetryIF.h"
 #include "fsfw/tmtcservices/PusVerificationReport.h"
@@ -22,10 +22,7 @@ ReturnValue_t PusServiceBase::performOperation(uint8_t opCode) {
   handleRequestQueue();
   ReturnValue_t result = this->performService();
   if (result != RETURN_OK) {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::error << "PusService " << (uint16_t)this->serviceId << ": performService returned with "
-               << (int16_t)result << std::endl;
-#endif
+    FSFW_LOGWT("performOperation: PUS service {} return with error {}\n", serviceId, result);
     return RETURN_FAILED;
   }
   return RETURN_OK;
@@ -74,11 +71,8 @@ void PusServiceBase::handleRequestQueue() {
       //      ": no new packet." << std::endl;
       break;
     } else {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-      sif::error << "PusServiceBase::performOperation: Service " << this->serviceId
-                 << ": Error receiving packet. Code: " << std::hex << status << std::dec
-                 << std::endl;
-#endif
+      FSFW_LOGWT("performOperation: Service {}. Error receiving packed, code {}\n", serviceId,
+                 status);
     }
   }
 }
@@ -92,15 +86,13 @@ ReturnValue_t PusServiceBase::initialize() {
   if (result != RETURN_OK) {
     return result;
   }
-  AcceptsTelemetryIF* destService =
-      ObjectManager::instance()->get<AcceptsTelemetryIF>(packetDestination);
-  PUSDistributorIF* distributor = ObjectManager::instance()->get<PUSDistributorIF>(packetSource);
+  auto* destService = ObjectManager::instance()->get<AcceptsTelemetryIF>(packetDestination);
+  auto* distributor = ObjectManager::instance()->get<PUSDistributorIF>(packetSource);
   if (destService == nullptr or distributor == nullptr) {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::error << "PusServiceBase::PusServiceBase: Service " << this->serviceId
-               << ": Configuration error. Make sure "
-               << "packetSource and packetDestination are defined correctly" << std::endl;
-#endif
+    FSFW_LOGWT(
+        "ctor: Service {} | Make sure static packetSource and packetDestination "
+        "are defined correctly\n",
+        serviceId);
     return ObjectManagerIF::CHILD_INIT_FAILED;
   }
   this->requestQueue->setDefaultDestination(destService->getReportReceptionQueue());