Azure RTOS connection to Azure IoT hub

[RDermenci]

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.

[Guillaume K]

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 Current version is a little bit outdated.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.