Introduction:
 
GPRS Shield - EFCom is an ultra compact and reliable wireless module. This GPRS Shield is compatible with all boards which have the same form factor (and pinout) as a standard Ardu Board. EFCom is base on SIM900 4 Frequency GPRS module.
 


The GPRS Shield is configured and controlled via its UART using simple AT commands. Just plug this shield on the Freadu board, you could easy to use AT command control EFCom Shild. You can use the 2 jumper block to connect the SIM900 URAT post to any pins within D0-D3(for Hardware/Software serial port). There is a switch on board , you can use it to select the connection of the UART port or Debug port ,but by the switch and jumper block, the SIM900 can be connect to PC via FT233RL.    Packing list:
1 x GPRS Shield -EFCom
1 x 4 Frequency Antenna