Wireless Quad Band GSM GPRS Module

Can be connected directly with microcontroller.
The IPX antenna, the antenna interface can be arbitrary switching PCB antenna, glue stick antenna and suction cups. SIM800L data 4 frequency communications, available in the world.
The small size is suitable for all kinds of embedded type Self projectile card slot, convenient change mobile phone card.
Using the IPX interface, can arbitrarily change the antenna the board treated by gold plated, more stable performance.
Wiring neat guarantee board guarantee board more stable in running Adding a protection device, which can realize anti reverse connection protection, high voltage protection, reduce the loss of the board, suitable for project and to learn

5VIN Power interface: Power the module CONNECT TO DC 5V
GND: Connect to GND.
VDD: TTL UART interface The TTL UART serial interface, you can connect the MCU like 51MCU or ARM or MSP430 directly. The pin of VDD is used to match the voltage of the TTL.
SIM_TXD: SIM module Transmitter.
SIM_RXD: SIM module Receiver.
GND: If this pin is unused, keep open.
RST: RST the module, if this pin is unused, keep open.