This GPRS/GSM module is a breakout board and minimum system of SIM900A Dual-band GSM/GPRS module. It can communicate with controllers via AT commands (GSM 07.07 ,07.05 and SIMCOM enhanced AT Commands). The interface is via UART/Serial. This module supports software power on and reset.

Tutorials:

• Instructables: Using the SIM900/SIM900A Mini Module with Arduino UNO

• Dual-Band 900/ 1900 MHz
• Onboard two set power supply interface VCC5 5V power supply, VCC4 interface, 3.5v-4.5V power supply, optional power on self starting (default) and control start.
• Onboard SMA (default) and IPXmini antenna interface, SIM900A interface reserved reset.
• SMA female socket, Antenna included.
• Low power consumption: 1.5mA (sleep mode)
• Control via AT commands (GSM 07.07 ,07.05 and SIMCOM enhanced AT Commands)
• UART TTL (3.3V  and RS232 level interface
• SIM Card Slot (Flip)
• Operation temperature: -40°C to +85 °C
• Size: 49mm*50mm
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