Libelium Waspmote Technical Manual page 96

The functions implemented in the API allow to send information in a simple way, calling functions such as:
{
_3G.sendSMS(message, number);
_3G.makeLostCall(number, timeCall);
}
This model uses the UART_1 at a baudrate of 115200 speed to communicate with the microcontroller.
Figure: 3G/GPRS module in Waspmote
Related API libraries: Wasp3G.h, Wasp3G.cpp
All information about programming and operation can be found in the document: 3G + GPRS Networking Guide.
All the documentation is located in the
* Note 1: A rechargeable battery must be always connected when using this module (USB power supply is not enough).
Development section of Libelium website.
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3G + GPRS
v6.3