Today we present an expansion shield for Raspberry Pi to control the very effective GSM/GPRS SIM900 and SIM908 (with GPS) modules: in this way it is possible to extend the functionality of Raspberry Pi for mobile applications (eg: remote control) and, by employing the SIM908 module, even the GPS functionality. Even if we will describe the procedure to connect a Raspberry Pi, the same goes for all GNU / Linux equipped with a serial port.
We already created very similar expansion shields for Arduino that you can see here and buy on our store.
Read more at Open Electronics