diff -r 55021f3f1929 -r e5254c6aa0c8 src/hp34comm.h
--- a/src/hp34comm.h	Tue Oct 11 00:14:20 2016 +0200
+++ b/src/hp34comm.h	Tue Oct 11 00:46:18 2016 +0200
@@ -44,11 +44,9 @@
   void handleChar(uint8_t val);
   void setstatedbg(void);    
   void rxIrq(void);
-  void txIrq(void);
   void timeout(void);
 
  private:
-  RawSerial serial_tx;
   RawSerial serial_rx;
   uint8_t buf[BUF_SIZE];
   uint8_t head;