Original AI-thinker A9 GPRS + GSM SMS Voice Wireless Data Transmission Module
Overview: 1. The A9 development board is a multi-function development board based on the Axin A9G GPRS/GSM module, which can be used to verify the basic communication functions and peripheral functions of the A9 module. 2. A9 development board has basic telephone/sms, GPRS network communication. 3. A9 development board contains lithium battery charge management, microphone, speaker interface, USB communication interface, multiple user buttons / led, TF card slot, acceleration sensor, SPI interface, I2C2 interface, ADC interface. 4. Pudding series development board camera expansion board, can be connected to 30W/200W camera. 5. A9 development board slot machine expansion board, can be connected to a traditional coin machine. Specifications: Chip size: 19.2 x 18.8 x 2.7mm (0.2mm) Working temperature: -30 C +80 C Working voltage: 3.5V-4.2V, 4V power supply is recommended Boot voltage: >3.5V Low power average current: below 2ma Support GSM/GPRS four frequency bands, including 850, 900, 1800, 1900MHZ GPRS Class: 10 Sensitivity:
