Avid readers of this blog may know that I have add a few temperature sensors to my heating setup (exactly 8 of them), in order to troubleshoot an issue we had as we moved into our new house. The description how I did that is described in this post. I used DS18B20 sensors and a Raspberry Pi to monitor temperature changes which delivered measurements to my Homeassistant installation over MQTT using rpi-temperature-mqtt . Over time, I added more and more functionality to this RPi: controlling the boiler via relays and also monitoring the serial bus of my Buderus boiler. Adding all these functions incrementally was pretty simple, but as a professional software engineer, I was feeling increasingly uncomfortable with how I would reproduce the same installation should the RPi fail. As a software professional I believe in CI/CD systems, automated tests and deployment. Infrastructure as Code and all that. I have to confess that this deployment was completely unlike show it should have been don
