// the find
espressif/esp-azure
SDK to connect ESP8266 and ESP32 to Microsoft Azure IoT services
A thin ESP-IDF component that wraps the Azure IoT C SDK for ESP32/ESP8266 connectivity to Azure IoT Hub. The repo's own README tells you not to use it for new projects — Microsoft shipped a dedicated FreeRTOS middleware and an Arduino library that supersede this. Worth knowing about mainly for maintaining existing firmware.
The MQTT and device twin examples are self-contained and straightforward — useful as a reference even if you switch to the newer SDK. The port layer (tlsio_esp_tls.c, platform_esp.c) shows exactly what you need to adapt the Azure C SDK to a new RTOS target, which is occasionally handy when the official docs don't cover your specific board variant. Kconfig integration means WiFi credentials and connection strings slot cleanly into the standard ESP-IDF menuconfig flow.
Officially deprecated — the README explicitly says avoid this for new projects, and the last meaningful commit was 2023. The entire value proposition is a single git submodule pointing at the Azure IoT C SDK, which itself is a heavy, dependency-laden C monolith not designed for constrained microcontrollers; the FreeRTOS middleware Microsoft later released is a much better fit. No OTA update examples, no DPS integration in the main MQTT sample, and the ESP8266 support was always questionable given memory constraints. 184 stars after years of Espressif promotion signals limited real-world uptake.