Question about GSM3IO.h

[Juju1111]

I wonder : in the file GSM3IO.h, on these lines :
#elif defined(AVR_ATmega2560) || defined(AVR_ATmega1280)
#define TXPIN 3
#define RXPIN 10
#define RXINT 4

Why RXPIN is 10 ? Shouldn't it be 2 ? As INT4 is on PIN2 ?

[vittorioexp]

Hi,

i tried to change it to 14, 18, 19, 20, 21, 50 but it doesn't work, and i really can't understand the reason.

Let me know if you have found a solution.

Vittorio

[vittorioexp]

Hi,

i found a solution: use pin A15 of arduno mega.

...

#elif defined(AVR_ATmega2560) || defined(AVR_ATmega1280)

#define __TXPIN__ 3

#define __RXPIN__ A15

#define __RXINT__ 4

...

Connect pin 2 to pin A15. Good luck. It works for me.

Vittorio