ATK-SIM900A GSM / GPRS module development board with DB9 socket AA16

ATK-SIM900A GSM / GPRS module development board with DB9 socket AA16
ATK-SIM900A module is ALIENTEK the development of a high-performance industrial grade GSM / GPRS module (development board), rich interface, complete functions, especially for applications that require voice / SMS / GPRS data services in various fields.
ATK-SIM900A module not only look beautiful, but also functional, rich interfaces, module size (not the antenna part) is 80mm * 58mm, and with mounting holes, very small, and conducive to install, can be easily applied to a variety of product design .
ALIENTEK ATK-SIM900A module (development board) onboard resources as follows:
GSM module: SIM900A
RTC backup battery
microphone port
headphone jack
RS232 interface selection
RS232 serial port
lithium battery Interface
power input connector
power LED (blue)
power switch
clamshell SIM card
SMA antenna interfaces and supporting small chili 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 devices;
seat 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;
peppers onboard antenna, can effectively improve the signal reception;
adopt international A-level PCB material, immersion