Added comments to callbacks

include/serialConnector.h

@@ -20,8 +20,7 @@ private:
     String received;
     String command;
 
-    void (*acknowledgeHandler)(String args);
-    void (*repeatHandler)(String args);
+    // Callback handlers for specific commands
     void (*calibrationBeginHandler)(String args);
     void (*calibrationInteruptHandler)(String args);
 
@@ -103,6 +102,7 @@ public:
      */
     void cycle();
 
+    // Register a callbacks for specific commands.
     void onCalibrationBegin(void (*handler)(String args));
     void onCalibrationInterupt(void (*handler)(String args));