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Ai-Thinker GPRS C SDK

Ai-Thinker GPRS SoC development SDK written by C.

中文版本

Average time to resolve an issue Percentage of issues still open

( A ) Hardware

1. A9: GPRS Module


Features:

  • RDA 32 bit RISC core, frequency up to 312MHz, with 4k instruction cache, 4k data cache
  • Up to 29 GPIOs (with two download pins)
  • Calendar (Real Time Clock) with alarm
  • 1 USB1.1 device interface
  • 2 UART interface with flow control (+1 download/debug serial port)
  • 2 SPI interface
  • 3 I 2 C interface
  • 1 SDMMC controller (interface)
  • 2 ADC interface, 10 bits
  • 32Mb (4MB) SPI NOR Flash
  • 32Mb (4MB) DDR PSRAM
  • 8kHz, 13Bits/sample ADC mic
  • 48kHz, 16bits/sample DAC Audio
  • Power Management Unit: Lithium battery charge management, integrated DC-DC and LDOs, variable IO voltage
  • 18.8 x 19.2 mm SMD package
  • Quad-band GSM/GPRS (800/900/1800 / 1900MHz)
  • calls
  • SMS service

2. A9G: GPRS + GPS + BDS Module


Features:

  • All the features of A9 above
  • Integrated GPS+BDS (connected to UART2 internal of module)

3. A9/A9G GPRS (+GPS+BDS) Development Board( pudding)


A9/A9G development board for easy development and debugging Features:

  • 1 A9G module (the board be the same that with A9 and A9G, for the A9 and A9G in the same package, the same pin )
  • 29 GPIOs with 2.45mm spacing (with 2 download debug pins (HST_TX, HST_RX)
  • One SIM card slot (Nano Card <Micro Card <Standard Card)
  • 1 TF card slot
  • 1 GPRS interface with IPEX 1 generation package
  • 1 GPS interface with IPEX 1 generation package
  • 1 micro USB interface
  • 5v-4.2V DC-DC, it can be 5v power supply or 3.8 ~ 4.2V power supply
  • 1 accelerometer chip(LIS3DHx)(not soldered by default)
  • 1 power key, and a reset button
  • 2 LED
  • 1 microphone

Or you can use other RDA8955 chip related module or board

4. USB to Serial Module


It should be noted that the USB interface on the development board is not a USB serial port function, but USB1.1 function, Therefore, in order to download or debug, you need at least one USB to serial port module to connect board's HST_TX and HST_RX pin

5. Power Supply

  • board can be light up with 5V(with DC-DC on dev-board) or 4.2V(VBAT) power, and ensure supply enough current(Peak current 2A)
  • if use lithium battery connected to VBAT, you must press power-key for a while to power up the module, or just pull down the power-key pin.
  • if VUSB connected with 5V(VBAT must supply with power ), the module will automaticly power up no matter power-key poll down or not.

( B ) SDK

SDK Features

  • Provide easy-to-use API, as long as you have C language knowledge. Integrates a wide range of features including basic GPIO, UART, SPI, IIC, ADC, RTC, OS, FS, SMS, CALL and GPRS, socket, DNS, MQTT, SSL/TLS, LBS, Audio play, Gizwits cloud, aliyun, libs cJson、NMEA etc.

Get the SDK

there's two way to download SDK:

  • Download the latest released archive from github release page.

    This release gets the released version of the code

  • Or clone directly(need to install git)

git clone https://github.com/Ai-Thinker-Open/GPRS_C_SDK.git

Develop applications using the SDK

Examples refer to the demo folder

Doumentation here: GPRS C SDK DOC

Including environment installation, burn & debug, api docs etc.

( E ) Feedback

( F ) Participate in the development

fork -> modify -> submit PR