SIM900A GSM /GPRS Module + Antennaa

Fully Arduino and Microcontroller Compatible

◾ GSM module: SIM900A
◾ RTC backup battery
◾ A microphone port
◾ A headphone jack
◾ RS232 interface selection
◾ RS232 serial port
◾ lithium battery Interface
◾ power input connector
◾ power LED (blue)
◾ power switch
◾ SIM card Slot
◾ SMA antenna interfaces and supporting small antenna
◾ Power On / Off button
◾ Network status indicator (red)

SIM900A modules were used for all IO port pin leads, easy to use

ATK-SIM900A module (development board) using industry-standard design, features include:

◾ onboard RS232 serial port (supports hardware flow control), convenient and PC / IPC and other devOces;
◾ Onboard 3.5mm headphone and microphone for easy voice communication development;
◾ SIM900A module leads all the IO ports, and communications section IO port compatibility design made for easy connection 3.3V/5V SCM system;
◾ efficient synchronous buck circuit board, the conversion efficiency up to 90%, support for wide voltage range (5 ~ 24V), ideal for industrial applications;
◾ Onboard power anti-reverse protection, TVS power protection and SIM card ESD protection, the protection function;
◾ Board RTC backup battery (XH414H-IV01E), without worrying about the power-down problem;
◾ Onboard antenna, can effectively improve the signal reception;
◾ adopt international A-level PCB material, immersion gold processing technology, stable and reliable;
◾ processed using the new components, copper plated pin, durable;
◾ Perfect design, each interface has a screen annotation, use a glance; connector location and reasonable arrangements designed to facilitate smoothly.
◾ PCB size is 80mm * 58mm, and with mounting holes, small and exquisite;

4, ATK-SIM900A GSM / GPRS module (development board) Specification

ATK-SIM900A SIMCOM module onboard the company’s industrial-grade dual-band GSM / GPRS module: SIM900A, working band frequency: 900/1800Mhz, can achieve low-power voice, SMS (SMS, MMS is not supported), data, and fax messages transmission.

ATK-SIM900A module supports RS232 serial port, and with hardware flow control, support for 5V ~ 24V the wide scope of work, so that the module can be very convenient to connect with your product, giving your product, including voice, SMS and GPRS data transmission and other functions.