diff --git a/CHANGELOG.md b/CHANGELOG.md
index b9a41a7d..233f1562 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -16,7 +16,9 @@ will consitute of a breaking change warranting a new major release:
 
 # [unreleased]
 
-- `eive-tmtc`:
+# [v6.4.0] 2023-08-15
+
+- `eive-tmtc`: v5.4.3
 
 ## Fixed
 
@@ -35,6 +37,7 @@ will consitute of a breaking change warranting a new major release:
 
 ## Added
 
+- The PLOC SUPV HK set is requested and downlinked periodically if the SUPV is on now.
 - SGP4 Propagator is now used for propagating the position of EIVE. It will only work once
   a TLE has been uploaded with the newly added action command for the ACS Controller. In
   return the actual GPS data will be ignored once SPG4 is running. However, by setting the
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 6610b0a6..058c99fc 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -10,7 +10,7 @@
 cmake_minimum_required(VERSION 3.13)
 
 set(OBSW_VERSION_MAJOR 6)
-set(OBSW_VERSION_MINOR 3)
+set(OBSW_VERSION_MINOR 4)
 set(OBSW_VERSION_REVISION 0)
 
 # set(CMAKE_VERBOSE TRUE)
diff --git a/linux/payload/PlocSupervisorHandler.cpp b/linux/payload/PlocSupervisorHandler.cpp
index 682b8020..940785af 100644
--- a/linux/payload/PlocSupervisorHandler.cpp
+++ b/linux/payload/PlocSupervisorHandler.cpp
@@ -155,12 +155,15 @@ void PlocSupervisorHandler::doStartUp() {
     startupState = StartupState::ON;
   }
   if (startupState == StartupState::ON) {
+    hkset.setReportingEnabled(true);
     setMode(_MODE_TO_ON);
   }
 }
 
 void PlocSupervisorHandler::doShutDown() {
   setMode(_MODE_POWER_DOWN);
+  hkset.setReportingEnabled(false);
+  hkset.setValidity(false, true);
   shutdownCmdSent = false;
   packetInBuffer = false;
   nextReplyId = supv::NONE;
@@ -170,6 +173,10 @@ void PlocSupervisorHandler::doShutDown() {
 }
 
 ReturnValue_t PlocSupervisorHandler::buildNormalDeviceCommand(DeviceCommandId_t* id) {
+  if (not commandIsExecuting(GET_HK_REPORT)) {
+    *id = GET_HK_REPORT;
+    return buildCommandFromCommand(*id, nullptr, 0);
+  }
   return NOTHING_TO_SEND;
 }
 
@@ -430,7 +437,7 @@ void PlocSupervisorHandler::fillCommandAndReplyMap() {
   insertInReplyMap(MEMORY_CHECK, 5, nullptr, 0, false);
 
   // TM replies
-  insertInReplyMap(HK_REPORT, 3, &hkset, SIZE_HK_REPORT);
+  insertInReplyMap(HK_REPORT, 3, &hkset);
   insertInReplyMap(BOOT_STATUS_REPORT, 3, &bootStatusReport, SIZE_BOOT_STATUS_REPORT);
   insertInReplyMap(LATCHUP_REPORT, 3, &latchupStatusReport, SIZE_LATCHUP_STATUS_REPORT);
   insertInReplyMap(LOGGING_REPORT, 3, &loggingReport, SIZE_LOGGING_REPORT);
@@ -790,6 +797,8 @@ ReturnValue_t PlocSupervisorHandler::initializeLocalDataPool(localpool::DataPool
   localDataPoolMap.emplace(supv::ADC_ENG_14, new PoolEntry<uint16_t>({0}));
   localDataPoolMap.emplace(supv::ADC_ENG_15, new PoolEntry<uint16_t>({0}));
 
+  poolManager.subscribeForRegularPeriodicPacket(
+      subdp::RegularHkPeriodicParams(hkset.getSid(), false, 10.0));
   return returnvalue::OK;
 }
 
@@ -918,7 +927,7 @@ ReturnValue_t PlocSupervisorHandler::handleExecutionReport(const uint8_t* data)
 ReturnValue_t PlocSupervisorHandler::handleHkReport(const uint8_t* data) {
   ReturnValue_t result = returnvalue::OK;
 
-  result = verifyPacket(data, supv::SIZE_HK_REPORT);
+  result = verifyPacket(data, tmReader.getFullPacketLen());
 
   if (result == result::CRC_FAILURE) {
     sif::error << "PlocSupervisorHandler::handleHkReport: Hk report has invalid crc" << std::endl;
diff --git a/linux/payload/plocSupvDefs.h b/linux/payload/plocSupvDefs.h
index d3fda3da..907bfe0c 100644
--- a/linux/payload/plocSupvDefs.h
+++ b/linux/payload/plocSupvDefs.h
@@ -139,7 +139,6 @@ enum ReplyId : DeviceCommandId_t {
 // Size of complete space packet (6 byte header + size of data + 2 byte CRC)
 static const uint16_t SIZE_ACK_REPORT = 14;
 static const uint16_t SIZE_EXE_REPORT = 14;
-static const uint16_t SIZE_HK_REPORT = 52;
 static const uint16_t SIZE_BOOT_STATUS_REPORT = 24;
 static const uint16_t SIZE_LATCHUP_STATUS_REPORT = 31;
 static const uint16_t SIZE_LOGGING_REPORT = 73;
diff --git a/mission/system/EiveSystem.cpp b/mission/system/EiveSystem.cpp
index 84b4edf7..6519806e 100644
--- a/mission/system/EiveSystem.cpp
+++ b/mission/system/EiveSystem.cpp
@@ -134,7 +134,7 @@ void EiveSystem::handleEventMessages() {
             if (event.getParameter1() == pdec::FRAME_DIRTY_RETVAL) {
               frameDirtyErrorCounter++;
               // Check whether threshold was reached after 10 seconds.
-              if(frameDirtyErrorCounter == 1) {
+              if (frameDirtyErrorCounter == 1) {
                 frameDirtyCheckCd.resetTimer();
               }
             }
diff --git a/tmtc b/tmtc
index f76cd945..b50c75c1 160000
--- a/tmtc
+++ b/tmtc
@@ -1 +1 @@
-Subproject commit f76cd9453593375974bc67fa7ce3906c6eb4443a
+Subproject commit b50c75c13cdbbc3d34d2f072d2bf1cb2fbe734b5