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CC3120: HTTP client get method example for CC3120

Viknesh Vadivel
Intellectual 310 points
Part Number: CC3120

Dear Team,

 

We are developing IoT based product using CC3120. We have read the CC3120 user guide but we couldn’t find “HTTP client get method example program” in the user guide. Please guide us from where can we get the “HTTP client get method example for CC3120”

 

Regards,

Viknesh Vadivel

  • 0
    TI__Mastermind 38980 points

    Hi Viknesh Vadivel,

    The latest version of the Wi-Fi Plugin has a HTTP client library (in the source/ti/net/http folder) but unfortunately it does not have an example. You can reference the httpget example from the CC32xx SDK, since it uses the same library. You can find the httpget demo here: https://dev.ti.com/tirex/explore/node?node=AJX80jEUY3hxL3BN6QJusQ__fc2e6sr__LATEST

    Best regards,

    Sarah

  • 0 in reply to Sarah P
    Intellectual 310 points

    Dear Sarah, 

    Thank you for the immediate response.

    We have tried the example in the link in our CC3120 development board but when the below line of the code executes , we are getting error code -2006.

    ret = HTTPClient_connect(httpClientHandle,HOSTNAME,0,0);

    As per the errors. h file error code -2006 means  

    "/* Parameters are invalid */
    #define SL_RET_CODE_INVALID_INPUT "

    we have changed our host address to a different address but still we are getting the same error code -2006. Please help us to resolve the error. 

    Example code link: https://dev.ti.com/tirex/explore/node?node=AJX80jEUY3hxL3BN6QJusQ__fc2e6sr__LATEST 

  • 0 in reply to Viknesh Vadivel
    TI__Mastermind 38980 points

    Hi Viknesh,

    Did you complete HTTPClient_create and HTTPClient_setHeader successfully? What is the HOSTNAME defined as?

    Best regards,

    Sarah

  • 0 in reply to Sarah P
    Intellectual 310 points

    Hi Sarah,

    Yes  HTTPClient_create and HTTPClient_setHeader both executed successfully. We have used both our own website as well as  "">http://www.google.co.in" in both the case we are getting error code -2006. 

    Regards,

    Viknesh Vadivel

  • 0 in reply to Viknesh Vadivel
    TI__Mastermind 38980 points

    Hi Viknesh Vadivel,

    I was able to connect to http://www.google.co.in successfully with the CC3220 example.

    Can you double-check your hostname format and the parameters for HTTPClient_connect?

    You can also check if the heap and stack on your host MCU are large enough. Also be sure you have the servicepack flashed to the CC3120.

    Best regards,

    Sarah

  • 0 in reply to Sarah P
    Intellectual 310 points

    Hi Sarah,

    Thank you for the response. We have bought CC3120 from TI website and connected with CC26X2, we have not flashed any servicepack. Should we need to flash servicepack ? If yes please guide us.

    Best Regards,

    Viknesh Vadivel

  • 0 in reply to Viknesh Vadivel
    TI__Mastermind 38980 points

    Hi Viknesh Vadivel,

    Yes, you are required to flash a servicepack version that is compatible with the host driver version or newer, listed in the SDK or Wi-Fi Plugin release notes. See the UniFlash ImageCreator Basics guide for how to create an ImageCreator project, add the latest servicepack, and program the image.

    Best regards,

    Sarah

  • 0 in reply to Sarah P
    Intellectual 310 points

    Hi Sarah, 

    Thank you for your clarification. I have attached a screenshot of the service pack in our CC3120 in this message, could please check and let us know whether still, we need to install the service pack to resolve this issue. 

    I need one more clarification, is it possible to interface CC3220 with CC26X2R1 via SPI?

    Regards,

    Viknesh Vadivel

  • +1 in reply to Viknesh Vadivel
    TI__Mastermind 38980 points

    Hi Viknesh,

    Yes, for the latest SimpleLink Wi-Fi Plugin 4.20, the servicepack version required is 3.16.0.1_2.0.0.0_2.2.0.7 or newer. You can find the servicepack in the tools/cc31xx_tools/servicepack-cc3x20 folder of the plugin.

    The CC3220 devices have an application MCU plus the network processor, and they support SPI, UART, and other peripherals. You could have a SPI interface between the CC3220 and CC26x2R1 that would be handled in the application.

    Best regards,

    Sarah