DollaTek SIMCOM SIM900 GSM GPRS Quad-Band Modules 2G Development Shield Board for R3 Mega with Antenna

SIM900 Shield GPRS expansion board is 100% compatible with all standard development board. Cautions 1.Make sure your SIM card is unlocked. 2.It is without an insulating enclosure. Please observe ESD precautions specially in dry (low humidity) weather. 3.The factory default setting for the GPRS Shield UART is 19200 bps 8-N-1. (Can be changed using AT commands). 4.Computer debugging USB--TTL : Powered by: 5V-26V, recommended 2A 5V power supply. Features: Quad-Band 850/900/1800/1900 MHz GPRS multi-slot class 10/8 GPRS mobile station class B Compliant to GSM phase 2/2+ Class 4 (2 W @ 850 / 900 MHz) Class 1 (1 W @ 1800 / 1900MHz) Control via AT commands - Standard Commands: GSM 07.07 & 07.05 | Enhanced Commands: SIMCOM AT Commands. Power select - select the power supply for GPRS shield Power jack - connected to external 4.8~5VDC power supply Antenna interface - connected to external antenna Serial port select - select either software serial port or hardware serial port to be connected to GPRS Shield Hardware Serial - D0/D1 Software serial - D7/D8 Status LED - tell whether the power of SIM900 is on Net light - tell the status about SIM900 linking to the net UART of SIM900 - UART pins breakout of SIM900 Microphone - to answer the phone call Speaker - to answer the phone call GPIO,PWM and ADC of SIM900 - GPIO,PWM and ADC pins breakout of SIM900 Power key - power up and down for SIM900 Low power consumption - 1.5mA(sleep mode) Industrial Temperature Range - -40°C to5 °C +8 Packing list: 1x SIM900 1x GSM antenna*1 1x Nano Sim Adapter kits(Nano convert to Micro Sim Adapter*1 , Nano to Standard Sim Adapter*1 , Micro Sim to Standard Sim Adapter*1 ,Card Pin*1)