SIMCOM SIM900  SIM900A  GPRS+GSM Module Mini Board for AVR 

The GSM/GPRS expanded plate is practical is SIM900 4 frequency GSM/GPRS module. Main control board for Arduino provide GSM/GPRS function expansion. And with the expansion after the board, can be short interest transceiver Arduino, and GPRS data connection communication

SIM900 modules connected through a serial port and Arduino, expand the board provides any serial jump line of choice may be, you can jump line through SIM900 decided to connect to Arduino hardware serial, or a 2 root pins practical software to simulate the serial interface

Expand board has switch can choose SIM900 serial or SIM900 debug mouth connection, if choose debug mouth, must be practical Arduino hardware serial ports, serial port is invalid. Simulation control The board provides ferrari capacitance on the RTC power supply module.Items content:1. SIM900 GSM/GPRS Arduino expanded plate2. GSM antenna3. GSM antenna turn wiring

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SIM900,SIMCOM SIM900A GPRS+GSM Module Mini Board &Free Shipping