The brewing chamber aims to maintain a constant temperature during weeks to control the beer's fermentation step.
This prototype uses a cardboard box for the chamber, the heating light increase temperature and the fans decrease it.
Actually simple conditions given a desired temperature are checked : if it is too cold then heat, if it is too hot then refresh.
Three leds help to check what's going on : red when heating, yellow when there is nothing to do and blue when cooling the box.
An InfluxDB time series database is also used to track temperature variations.
Grafana i used to display the data recored in InfluxDB.
Node red manages the whole systemand it runs on a raspberry pi 3 B+.