Add helpers getReadSource() getSerialPort().

include/prot.h

@@ -122,6 +122,9 @@ public:
                            uint8_t  *RdDlen, uint8_t *receivedData);
         // retval: data valid, only one time true
 
+    uint16_t getReadSource() { return readSource; } // readSource contains last command sent to device controller
+    T_com *getSerialPort() { return mySerialPort; } // utility function
+
 
 signals:
     void framerecieved();   //bool gotINdata);