diff -r e5254c6aa0c8 -r 01515349b30e src/main.cpp
--- a/src/main.cpp	Tue Oct 11 00:46:18 2016 +0200
+++ b/src/main.cpp	Tue Oct 11 21:44:04 2016 +0200
@@ -276,7 +276,7 @@
   wait(2);
   dsp->cls();
 
-  hp = new HPSerial(HP_RX, HP_TX);
+  hp = new HPSerial(HP_RX);
   //hp = NULL;
 }