The GPRS/GSM Shield is configured and controlled via its UART using simple AT commands.
The GPRS/GSM Shield is compatible with all boards which have the same form factor (and pinout) as a standard Arduino Board. The shield allows you to achieve this via any of the three methods: The GPRS/GSM Shield provides you a way to use the GSM cell phone network to receive data from a remote location. 8.4.3 Using AT Commands to Control GPIO and PWM pins.
