diff --git a/main.cpp b/main.cpp
index 63ad9a1..f3d22bb 100644
--- a/main.cpp
+++ b/main.cpp
@@ -12,7 +12,10 @@
 //from the core and we need to include it explicitly
 #include <SPI.h>
 
+// Crete default timer which is able to manage 10 concurrent tasks
+// and uses milliseconds as a timebase.
 auto timer = timer_create_default();
+bool periodicHandler1(void* args);
 
 void setup() {
     // Set data direction of selected port to output.
@@ -30,18 +33,20 @@ void setup() {
     Serial.println(" bytes");
 #endif
     SPI.begin();
+    // Call periodic handler with certain interval
+    timer.every(RING_BUFFER_CHECK_INTVL, periodicHandler1);
 }
 
 bool periodicHandler1(void* args) {
     if(args) {};
+    Serial.println("Handling new data!");
     IOBoard::handleNewData();
-    return false;
+    // repeat action
+    return true;
 }
 
 void loop() {
     timer.tick();
-    timer.every(RING_BUFFER_CHECK_INTVL, periodicHandler1);
-    //delay(1000);
 }