Development board introduction: The A9G development board is a versatile development board based on EMC #39;s A9G GPRS / GSM + GPS / BDS module that can be used to validate the basic communication functions and peripheral functions of the A9G module. A9G development board with the basic phone / SMS, GPRS networking communications, GPS / BDS dual-mode positioning capabilities. A9G development board contains a lithium battery charging management, microphone, speaker interface, USB communication interface, multiple user keys / led, TF card slot, accelerometer, SPI interface, I2C2 interface, ADC interface. A9G development board camera expansion board, an external 30W / 200W camera. A9G development board slot machine expansion board, can add a traditional slot machine. Based on the above features, A9G can be used for a variety of peripheral prototyping verification: Use GPRS + GPS, as well as acceleration sensors for vehicle immobilizer. Remote monitoring intercom using GSM and microphone / speakers Smart watch with 1.54 #34;capacitive touch screen using GPRS / GSM + GPS Use of GPRS / GSM + GPS, heart rate oximeter sensor, 1.54-inch capacitive touch screen monitor the elderly Use GPRS + TF + camera extension board remote monitoring camera Wechat payment slot machine scheme using slot machine Using onboard features, custom device based on Lua programming