I have recently purchased the open electronics raspberry gsm/gps sim908 module and having problems getting it to work. On initial debug it looks like there is no serial tx from the module, but the hardware looks find and there is nothing complex on the interface board.
The odd thing in a terminal screen (minicom) I cannot send or receive any AT commands, indicating there is a problem with the communication to the sim908 module. So looking at some more loop back tests and ordered a serial cable to hook up to a PC, to see the serial comms and then some more scope time with the Rx & Tx lines.
It all looks too simple and just looking for anyone else that might have experience with this GSM/GPS module.
https://store.open-electronics.org/inde ... _Raspberry