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

• Product wiki

• A9 Module ×1
• GSM Antenna ×1