My apologies for asking what appears to be a common question. Unfortunately, I couldn't find a clear answer in the postings and the documentation is a bit ambiguous.
I'd like to connect an Arduino GSM 2 Shield to a Mega 2560 without stacking. I can't find any instructions for doing so. I have had the GSM shield successfully running while stacked on an UNO for unit testing, and now need to move to a bigger platform.
The schematic suggests, that outside of +5V and Ground, only 4 connections are made to the underlying board when stacked. These are:
. Power Reset . D7 . GSM Rx . GSM Tx
On the other hand, the documentation for the Arduino GSM2 seems to indicate that only the GSM Tx D2 pin needs to be connected to the Mega's D10 pin. There isn't any info about what other pins, if any, have to be connected.
Does anyone have experience with connecting the GSM2 to a Mega 2560 without stacking ?