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GPRS series module topic



GPRS series module topic


A9 is the latest GSM/GPRS module launched by Essence. The cost reduction of the core chip makes the whole solution more cost-effective. It provides information transmission functions such as serial port to GPRS/short message/voice call, which is widely used in the fields of Internet of things/vehicle/electric environment detection.

A9G is a complete quad-band GSM/GPRS+GPRS/GPS module. The cost reduction of the core chip makes the whole solution more cost-effective. It is convenient to apply to various IoT hardware terminal occasions.


Selection table


Please poke the full range of modules to purchase:Anxinke official Taobao shop

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Main specifications


A9/A9G Module


  • A9/A9G size: 19.2*18.8*2.7mm (±0.2mm)
  • Working temperature -20℃+70℃;
  • Working voltage 3.8V-4.2V, 4V power supply is recommended;
  • Boot voltage>3.8V;
  • Low power consumption average current is below 2mA;
  • Support GSM/GPRS four frequency bands, including 850, 900, 1800, 1900MHZ;
  • GPRS Class 10;
  • Sensitivity ←105dB;
  • Support voice calls;
  • Support SMS;
  • GPIO level is at 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 extended commands;
  • A9 supports 3 serial ports, one download serial port and one AT command port;
  • A9G supports 3 serial ports, one download serial port and one GPS serial port;
  • AT commands support standard AT and TCP/IP command ports;
  • Support digital audio and analog audio, support HR, FR, EFR, AMR voice coding;
  • Support GPS+AGPS (only applicable to A9G);


AT command debugging




( Among A9Tracker related functions, the A9 module uses the base station positioning function, and the A9G module can choose to set the base station positioning function or the GPS positioning function, and upload the current position information to WeChat or app regularly. When positioning indoors, due to GPS signals Too weak, it is recommended to set the base station positioning function. For details, refer to the following documents)


Secondary development





Resource summary


Anxinke Information

  • STM32 driver for A9/A9G (for reference only): program


Guokewei original factory information


Pudding Series Development Board

Other resources

Contact us


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Email: support@aithinker.com