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SDK to connect ESP8266 and ESP32 to Microsoft Azure IoT services
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mahavirj Merge branch 'bugfix/tlsio_cap_recv_bytes' into 'master'
tlsio: cap rcv_bytes loop

See merge request esp-components/esp-azure!19
Latest commit 6706397 Apr 23, 2019


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Espressif offers a wide range of fully-certified Wi-Fi & BT modules powered by our own advanced SoCs. For more details, see Espressif Modules.

Azure cloud is one of the most wonderful clouds that collects data from lots of devices or pushes data to IoT devices. For more details, see Azure IoT Hub.

This demo demonstrates how to firstly connect your device (ESP devices or IoT devices with ESP devices inside) to Azure, using MQTT protocol, then send data to Azure as well as receive message from Azure.

Main workflow:



1. Hardware

  • An ubuntu environment should be set up to build your demo;
  • Any ESP device can be used to run your demo.

2. Azure IoT Hub;SharedAccessKeyName=iothubowner;SharedAccessKey=zMeLQ0JTlZXVcHBVOwRFVmlFtcCz+CtbDpUPBWexbIY=
  • For step-by-step instructions, please click here.

3. Azure CLI

After that, you should be able to use azure CLI to manage your iot-device.

4. Device Connection String

  • login to Azure CLI
  • create your device, and get a device connection string. An example can be seen:

For detailed instruction, please click Here.

5. SDK

  • AZURE-SDK can be implemented to connect your ESP devices to Azure, using MQTT protocol.
  • Espressif SDK

6. Compiler

  • For ESP32 platform: Here
  • For ESP8266 platform: Here

Configuring and Building

1. Cloning Git submodules

This repo uses Git Submodules for its dependancies. To successfully clone these other repositories, after cloning this repo, use the following command in the root:

git submodule update --init --recursive

Checking Result

Please check results on both the iothub and device side:

  • az iot hub monitor-events -n [IoTHub Name] --login ';SharedAccessKeyName=iothubowner;SharedAccessKey=12345'

  • ESP device: monitor events with command make monitor

ESP device would send data to the Azure cloud, and then you would be able to receive data at the iothub side.


  1. Some common problems can be fixed by disabling the firewall.

  2. You can try with the followings, if your build fails:

    • git submodule init
    • git submodule update
    • export your compiler path
    • export your IDF path
    • get start from Here
  3. Make sure the device connection string you are using, which you get from Azure IoT Hub, is correct.

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