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A9 GSM/GPRS Module

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A9 is a complete quad-band GSM/GPRS module based on RDA8955. The cost reduction of the core chip provides users a cost-effective IoT solution. Integrating protocol stacks such as GSM/GPRS inside, this module supports the basic phone voice call/SMS, serial to GPRS and GPS data transmission functions, which can be used in a wide range of applications, such as IoT, vehicle-mounted equipment, remote localization, electric power environment monitoring.

The module allows users to make voice call, use SMS services and access the internet and base position with only a SIM or IoT card. A9 could also work with other devices by AT command. Besides, the module comes with 29 GPIOs and integrated SDK that could greatly facilitate private redevelopment.



  • 32 bit RISC core, frequency up to 312MHz, with 4k instruction cache, 4k data cache
  • Up to 29 GPIOs (with two download pins)
  • PMU(Power Management Unit): Lithium battery charge management, integrated DC-DC and LDOs
  • Quad-band GSM/GPRS (850/900/1800/1900MHz)
  • Voice call
  • SMS


  • Working Temperature: -20℃+70℃
  • Low Power Mode Current: 2mA below (average)
  • GPRS Class 10
  • Sensitivity<-105dB
  • GPIO Level: 2.8V
  • Supports GPRS data service, the maximum download data rate is 85.6 Kbps, upload data is 42.8 Kbps.
  • Supports standard GSM07.07,07.05 AT command and Ai-Thinker expandable  command set
  • AT command supports standard AT & TCP/IP command Port


Shipping List

  • A9 Module ×1
  • GSM Antenna ×1



  • Artikelnummer: TEL0135
  • 0 Stück auf Lager
  • Hergestellt von: DFRobot

Dieser Artikel wurde am Freitag, 16. April 2021 im Shop aufgenommen.

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