A9 GPRS + GSM SMS Development Board

A9 GPRS + GSM SMS Development Board


A9 GPRS/GSM module. Basic phone/SMS, GPRS communications, lithium battery charge management, etc.
Note: Specifications, Prices & Availability may change without notice. Images are for illustration purposes only. E&OE

Brand: Ai-Thinker

Availability: 2 in stock SKU: STC-00253 Categories: , , , Tags: , ,


The A9 development board has basic telephone/SMS, GPRS network communication.
It also features lithium battery charge management, microphone, speaker interface, USB communication interface, multiple user buttons/led, TF card slot, acceleration sensor, SPI interface, I2C2 interface, and ADC interface.
A9 development board slot machine expansion board, can be connected to a traditional coin machine.


  • Remote monitoring intercom with GSM and microphone/speakers,
  • Remote monitoring camera with GPRS + TF + camera extension board,
  • Wechat payment slot machine scheme with the slot machine function.
  • Chip size: 19.2*18.8*2.7mm (±0.2mm)
  • Working temperature -30 ° C +80 ° C;
  • Working voltage is 3.5V-4.2V, 4V power supply is recommended;
  • Boot voltage > 3.5V;
  • Low power average current is below 2mA;
  • Support GSM/GPRS four frequency bands, including 850, 900, 1800, 1900MHZ;
  • GPRS Class 10;
  • Sensitivity <-105;
  • Support voice calls;
  • Support SMS;
  • GPIO level is 2.8V;
  • Support GPRS data service, maximum data rate, download 85.6Kbps, upload 42.8Kbps;
  • Support standard GSM07.07, 07.05 AT commands and Ai-Thinker extension commands;
  • A9 supports 3 serial ports, one download serial port and one AT command port;
  • AT command supports standard AT and TCP/IP command ports;
  • Support digital audio and analog audio, support HR, FR, EFR, AMR voice coding

A6, A9 and A9G User Manual In Chinese

A9 AT Instruction Set

A9 Specifications

Additional information

Weight23 g



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