A mini GSM / GPRS breakout board based on SIM800L module, supports quad-band GSM/GPRS network, available for GPRS and SMS message data remote transmission. It communicates with micro controller via UART port, supports command including 3GPP TS 27.007, 27.005 and SIMCOM enhanced AT Commands. In transmission the module can consume up to 2 Amps of current. You will need to power the module between 3.7V and 4.2V. You can use a high-power buck-to-buck converter module to do that. Feature: Module models: SIM800L (latest module, performance than SIM900 / M590) Operating voltage: 3.7 ~ 4.2V (maximum current is 1A) Support network : China mobile, China unicom and four-frequency network all over the world Module size: 2.5x2.3cm TTL serial port, can directly connect to MCU. No need a MAX232 Auto-start ignition, automatic network search On- board channel indicator light (with slow signal flash, no fast flash signal) Note : Negative signal area add antenna.

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