Can anyone clarify what RXPIN should be changed to for the ATmega 2560? The following code from the latest version of GSM3SoftSerial.cpp (included with 1.0.5-r2) seems to suggest that it is re-defined depending on the type of AT is connected, but all of my GSM sketches fail when I run them on the 2560 without changes.
#if defined(__AVR_ATmega328P__)
#define __TXPIN__ 3
#define __RXPIN__ 2
#define __RXINT__ 3
#elif defined(__AVR_ATmega2560__) || defined(__AVR_ATmega1280__)
#define __TXPIN__ 3
#define __RXPIN__ 10
#define __RXINT__ 4
#elif defined(__AVR_ATmega32U4__)
#define __TXPIN__ 3
#define __RXPIN__ 8
#define __RXINT__ 3
#endif
Do you also have to run a jumper wire somewhere after implementing the change?