Azure IoT Hub temperature telemetry

An example of a Raspberry Pi being used to read temperature using a DS18B20 temperature sensor and report those readings to an Azure IoT Hub without any SDKs.

Pre-requisites

• Raspberry Pi
  • Raspbian/Raspberry Pi OS with the one-wire interface enabled
• DS18B20 temperature sensor
• IoT Hub setup on Azure

Required secrets

A file with secrets must first be supplied at root named config.yml

Example of config.yml:

azure_mqtt_host: "[Azure IoT Hub hostname]"
azure_mqtt_endpoint: "devices/[IoT Hub device ID]/messages/events/"
azure_device_name: "[IoT Hub device ID]"
azure_device_key: "[IoT Hub device key]"

Usage

1.) Change Ansible inventory to point to your Raspberry Pi device.

2.) Run just setup at root.

Raspberry Pi will read the temperature in Celsius every 30 seconds and then report it to Azure every minute.