Tags: GSM, GPRS, , GPS, Ai-Thinker, A9, module

GSM GPRS GPS Ai-Thinker A9 module

  • 99.00 AED
    • Ex Tax:99.00 AED
    • Product Code:
    • Availability: In Stock
    This GPRS GSM breakout board based on the AI-Thinker A9, which it a newest GSM GRPS Quad-Band module. You can add voice, text, SMS and data to your project with this module. It is high cost performance compare with SIM800, SIM900. A9 is an ideal solution for M2M applications, suitable for automotive..

    This GPRS GSM breakout board based on the AI-Thinker A9, which it a newest GSM GRPS Quad-Band module. You can add voice, text, SMS and data to your project with this module. It is high cost performance compare with SIM800, SIM900. A9 is an ideal solution for M2M applications, suitable for automotive, industrial and PDA, personal tracking, electricity environment detection, wireless POS, smart metering, and other M2M applications , to provide comprehensive GSM / GPRS text messaging, voice and data transmission services.

    Features:

  • Working voltage: 5v USB or Lipo battery(3.3V-4.2V)
  • Support the GSM / GPRS four bands, including 850,900,1800,1900MHZ
  • Supports digital audio and analog audio, supports HR, FR, EFR, AM R voice coding
  • Support voice calls and SMS messages
  • Embedded network service protocol stack
  • Support standard GSM07.07.07.05AT command

  • Development board

    Ai-Thinker developed a small board which is perfect for hobbyists like myself! It's called "Pudding" board.

    This boards has everything that we need, and even a SD card reader and embedded mic!

    Development environment setup under Windows

    Official documentation

    • Download CSDTK4.2 (baidu cloud, MEGA cloud, direct link)
    • Get SDK from Github (pre-release V2.112)
    • Decompress the downloaded CSDTK file (e.g: C:\CSDTK)
    • Run config_env_admin.bat file in CSDTK to set environment variables
    • Decompress the CSDK downloaded file (e.g: C:\GPRS_C_SDK)
    • Open a PowerShell terminal into the CSDK folder and type .\build.bat app to build the app folder source code in debug mode

    Build command

    You can use ./build.bat script to build project:

    • ./build.bat $PROJ: compile app module,e.g.: ./build.batsh app to compile the source code of app folder
    • ./build.bat demo $PROJ: compile a demo project, e.g.: ./build.bat demo gpio to compile gpio demo
    • ./build.bat clean $PROJ: clear the build files of $PROJ
    • ./build.bat clean all: clear all the build files
    • ./build.bat demo $PROJ release: build a release version, e.g.: ./build.bat demo gpio release.

    By default, build.bat will build a debug version.

    In release mode, the watchdog resets the system after an error.

    A build and an hex folder will be generated after compile.

    Two hex file will be generated into the hex folder (*_B*.lod and *_flash.lod). The bigger file should be flashed after each SDK upgrade. The smaller one will contain the compiled source code and must be uploaded after compilation.

    Upload source code

    Hardware connection

    As the A6 chip, the download interface is the HST interface. The pins HST_RX and HST_TX are respectively connected to the TX and RX pins of the USB to serial module.

    To power the device, you can use a lithium battery (voltage 3.8v ~ 4.2v) (VBAT pins), or use a 5v power supply (5v input pin or USB input).

    Please note that when using lithium battery power supply, the POWER KEY must be pressed for about 3 seconds to power on the module (not the case with the USB plug).

    Software tool

    In CSDTK folder, start cooltools\coolwatcher.exe.

    Select profile 8955 and change the lastcomport value by the COM port number of your USB/Serial converter, then click on the "OK" button

    You should be connected :

    Select the flash programmer with the "Flash > Choose Flash Programmer..." menu.

    In the cooltools\chipgen\Modem2G\toolpool\plugins\fastpf\flash_programmers folder, select the *_8955_*_spi32m_ramrun.lod file (e.g: host_8955_flsh_spi32m_ramrun.lod).

    You can now burn the firmware. Click on the "LOD" icon:

    In the CSDK hex folder, you should find a *_debug.lod file and a *_flash_debug.lodfile. The *_debug.lod file should be burn first, and need only to be flashed when the SDK is updated.

    To flash a file once selected, click on the burn icon:

    You can try it as I did with the GPIO example.

    After a code change, you just have to compile the source code and press the burnbutton again. You don't need to re-select the file.

    Debug

    Click on Plugins -> Active Tracer. On the Trace tool window, click on Set trace levels icon:

    And change the settings according to the following screenshot:

    You can now click on the Start sniffing traces button.

    Each time that the 

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