The module is based on SIM800L GSM/GPRS chip that operates on quad-band 850/900/1800/1900MHz, so it would work on GSM network in all countries across the world. It can be used to send and receive data over SMS and GPRS which is great for machine-to-machine (M2M) data communication.
On board, there is a u.FL/IPX connector for external antenna. We include a u.FL/IPX to SMA cable and a mini GSM antenna in the package. The SIM card holder accepts a micro-SIM card (15 x 12 mm). SIM card is not included in the package. Be sure to insert the SIM card in the correct orientation by following the diagram printed on board.
This module doesn't work standalone. It requires a microcontroller/microprocessor with serial TTL UART interface. Communication is done via AT commands. The board requires 5V supply voltage. The TTL UART interface is compatible with both 3.3V and 5V systems so you can connect it directly to boards like Raspberry Pi, Beaglebone Black or Arduino. Just connect 5V DC power and ground and send/receive data over TX/RX pins. You can also connect this module to a PC with a USB to TTL cable and use serial terminal program such as Putty to talk to this module.
There are 2 status LEDs, labelled as NET and RING. The RING LED will be off or flashed when receiving a message. The NET LED blinks every 1 second when it is searching for network and blinks every 3 seconds when it is ready and connected to a GSM network.
Features:
Quad-band GSM/GPRS 850/900/1800/1900MHz
Small footprint for variety of embedded applications
