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Azure IoT Hub Library source files

AzureIoTHub - Azure IoT Hub library for Arduino

This is the location of the Arduino-specific source files for the

AzureIoTHub Arduino published library.

This library is a port of the Microsoft Azure IoT device SDK for C to Arduino. It allows you to use several Arduino compatible boards with Azure IoT Hub. Please submit any contribution directly to azure-iot-sdks.

Currently supported hardware:

• ESP8266 based boards with esp8266/arduino

  • SparkFun Thing

  • Adafruit Feather Huzzah

• ESP32 based boards with espressif/arduino-esp32

  • Adafruit HUZZAH32

Prerequisites

You should have the following ready before beginning with any board:

• Setup your IoT hub

• Provision your device and get its credentials

• Arduino IDE

• Install the Azure IoT C SDK libraries by one of two options:

  1. Generate the Libraries by executing the make_sdk.py script within the build_all folder, E.x.: python3 make_sdk.py -o <your-output-folder>
  • Note: this is also currently the ONLY way to build the AzureIoTSocket_WiFi library for using the esp32.
  2. Install the following libraries through the Arduino IDE Library Manager:
  • AzureIoTHub, AzureIoTUtility, AzureIoTProtocol_MQTT, AzureIoTProtocol_HTTP

Simple Sample Instructions

ESP8266

Sparkfun Thing, Adafruit Feather Huzzah, or generic ESP8266 board

1. Install esp8266 board support into your Arduino IDE.

   • Start Arduino and open Preferences window.

   • Enter http://arduino.esp8266.com/stable/package_esp8266com_index.json into Additional Board Manager URLs field. You can add multiple URLs, separating them with commas.

   • Open Boards Manager from Tools > Board menu and install esp8266 platform 2.5.2 or later

   • Select your ESP8266 board from Tools > Board menu after installation

2. Open the iothub_ll_telemetry_sample example from the Arduino IDE File->Examples->AzureIoTHub menu.

3. Update Wifi SSID/Password in iot_configs.h

   • Ensure you are using a wifi network that does not require additional manual steps after connection, such as opening a web browser.

4. Update IoT Hub Connection string in iot_configs.h

5. Configure board library using the automation script and python3. If you choose this method you can skip step 6.

   • Clone or download this repo: git clone https://github.com/Azure/azure-iot-pal-arduino.git , navigate to the downloaded sub-folder: cd azure-iot-pal-arduino/build_all/base-libraries/AzureIoTHub/src/scripts , and check that the script automate_board_config.py exists in this location. If this folder or script cannot be located, download the script directly.
   • Run the script E.x.: python3 automate_board_config.py and select appropriate options.
   • Note: if you update or reinstall your board library in Arduino you will need to run this script again.

6. Navigate to where your esp8266 board package is located, typically in C:\Users\<your username>\AppData\Local\Arduino15\packages on Windows and ~/.arduino15/packages/ on Linux

• Locate the board's Arduino.h (hardware/esp8266/<board package version>/cores/esp8266/ and comment out the line containing #define round(x), around line 137.

• Two folders up from the Arduino.h step above, in the same folder as the board's platform.txt, paste the platform.local.txt file from the esp8266 folder in the sample into it.

  • Note1: It is necessary to add -DDONT_USE_UPLOADTOBLOB and -DUSE_BALTIMORE_CERT to build.extra_flags= in a platform.txt in order to run the sample, however, you can define them in your own platform.txt or a platform.local.txt of your own creation.

  • Note2: If your device is not intended to connect to the global portal.azure.com, please change the CERT define to the appropriate cert define as laid out in certs.c

  • Note3: Due to RAM limits, you must select just one CERT define.

7. Run the sample.

8. Access the SparkFun Get Started tutorial to learn more about Microsoft Sparkfun Dev Kit.

9. Access the Huzzah Get Started tutorial to learn more about Microsoft Huzzah Dev Kit.

ESP32

Sparkfun ESP32 Thing, Adafruit ESP32 Feather, or generic ESP32 board

1. Install esp32 board support into your Arduino IDE.

   • Start Arduino and open Preferences window.

   • Enter https://dl.espressif.com/dl/package_esp32_index.json into Additional Board Manager URLs field. You can add multiple URLs, separating them with commas.

   • Open Boards Manager from Tools > Board menu and install esp32 platform 1.0.2 or later

   • Select your ESP32 board from Tools > Board menu after installation

2. Open the iothub_ll_telemetry_sample example from the Arduino IDE File->Examples->AzureIoTHub menu.

3. Update Wifi SSID/Password in iot_configs.h

• Ensure you are using a wifi network that does not require additional manual steps after connection, such as opening a web browser.

4. Update IoT Hub Connection string in iot_configs.h

5. Configure board library using the automation script and python3. If you choose this method you can skip step 6.

   • Clone or download this repo: git clone https://github.com/Azure/azure-iot-pal-arduino.git , navigate to the downloaded sub-folder: cd azure-iot-pal-arduino/build_all/base-libraries/AzureIoTHub/src/scripts , and check that the script automate_board_config.py exists in this location. If this folder or script cannot be located, download the script directly.
   • Run the script E.x.: python3 automate_board_config.py and select appropriate options.
   • Note: if you update or reinstall your board library in Arduino you will need to run this script again.

6. Navigate to where your esp32 board package is located, typically in C:\Users\<your username>\AppData\Local\Arduino15\packages on Windows and ~/.arduino15/packages/ on Linux

   • Navigate deeper in to hardware/esp8266/<board package version>/ where the platform.txt file lives.

   • Copy the platform.local.txt file from the esp32 folder in the sample into the same folder as the platform.txt.

   • Alternatively, or for later versions of the Board Package, add the define -DDONT_USE_UPLOADTOBLOB to build.extra_flags= in platform.txt or a platform.local.txt that you create.

7. Run the sample.

8. Access the SparkFun Get Started tutorial to learn more about Microsoft Sparkfun Dev Kit.

9. Access the Huzzah Get Started tutorial to learn more about Microsoft Huzzah Dev Kit.

License

See LICENSE file.

Complete information for contributing to the Azure IoT Arduino libraries

can be found here.