diff -r 5cf4034ba4e0 -r 55021f3f1929 src/hp34comm.h
--- a/src/hp34comm.h	Fri Sep 23 21:12:43 2016 +0200
+++ b/src/hp34comm.h	Tue Oct 11 00:14:20 2016 +0200
@@ -7,8 +7,8 @@
 /***** HP 34970A communication class ***/
 
 #define MAX_ERRS 10
-#define MAX_BUFF 32
-#define BUF_SIZE 32
+#define MAX_BUFF 16
+#define BUF_SIZE 16
 
 class HPSerial {
 
@@ -29,7 +29,7 @@
 
 
   
-  HPSerial();
+  HPSerial(PinName rx, PinName tx);
   
   bool cmd_available(void);
   bool pop(CMD& cmd);