We have released an updated Microsoft Azure IoT tutorial, featuring Mongoose OS with the STM32-B-L475E-IOT01A from STMicroelectronics. This is a very capable board from STMicro's STML4 low-power series, targeting IoT market:

Please check out the video that outlines firmware build, network configuration, Azure IoT hub registration, working with the device twin, and OTA:

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