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R
RDermenci
Graduate
May 27, 2022
Question

Azure RTOS connection to Azure IoT hub

  • May 27, 2022
  • 1 reply
  • 758 views

Hello,

I have some, maybe senseless, questions about X-CUBE-AZRTOS and it's applications. I have downloaded and checked this firmware, and also examples.

Here my questions:

1 - Since Low-level driver interface handles connection between NeX Duo Core and Hardware Ethernet, Cellular or Wifi, should I write a low level driver for third party Wifi modules or GSM Modules?

2 - I couldn't get what protocol is used to Azure IoT hub on 32L496GDISCOVERY Azure Cloud Application. Is it an HTTPS connection?

Thanks for your help, in advance.

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    1 reply

    G
    Guillaume K
    ST Employee
    June 3, 2022

    Hello

    Are you talking of X-CUBE-AZRTOS or X-CUBE-AZURE ?

    X-CUBE-AZRTOS provides a port of Azure RTOS and other related components to "old" versions of STM32 lines. But there is no project example for Azure Iot Cloud access.

    X-CUBE-AZURE provides project examples to connect to Azure Cloud IoT service. Current version is a little bit outdated. It is based on FreeRTOS/LwIP/mbedTLS and an old Azure IoT SDK. It uses MQTT protocol to access IoT hub (plus TLS layer for network security).

    In X-CUBE-AZURE there are drivers for each physical interface selected for each board supported. On 32L496DISCOVERY it is a cellular modem (on a extension daughter board connected to PMOD+ port).

    Depending on the board/network interface there are some example of network drivers but if you select your own, you have to develop the driver for it.

    It all depends on your architecture choices: which STM32 board, which network interface, which RTOS+network stack.

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