Revert "Remove a serial print"

This reverts commit faab515cdb0638f48ec5d675bbbe235888581e58.

arduino/devcomuino/devcomuino.h

+#if defined(ARDUINO_AVR_UNO)
+    static const uint8_t analog_pins[] = {A0,A1,A2,A3,A4,A5}; //Arduino Uno
+#elif defined(ARDUINO_AVR_MEGA2560)
+    static const uint8_t analog_pins[] = {A0,A1,A2,A3,A4,A5,A6,A7,A8,A9,A10,A11,A12,A13,A14,A15}; //Arduino mega
+#endif

arduino/devcomuino/devcomuino.ino

 #include "Wire.h"
+#include "devcomuino.h"
 
 const unsigned int MAXARGS=5;
 const unsigned int MAXBYTES=16;
@@ -91,32 +92,14 @@ void cmdHELP()
 void cmdADC(int channel)
 {
   float V;
-  switch(channel)
-    {
-    case 0:
-      V=analogRead(A0);
-      break;
-    case 1:
-      V=analogRead(A1);
-      break;
-    case 2:
-      V=analogRead(A2);
-      break;
-    case 3:
-      V=analogRead(A3);
-      break;
-    case 4:
-      V=analogRead(A4);
-      break;
-    case 5:
-      V=analogRead(A5);
-      break;
-    default:
-      Serial.println("ERR invalid channel");
-      break;
-  }
 
-  Serial.println(V);
+  if (channel < sizeof(analog_pins)) {
+    V=analogRead(analog_pins[channel]);
+    Serial.println(V);
+  }
+  else {
+    Serial.println("ERR invalid channel");
+  }
 }
 
 //