I must admit that this post is just an excuse to play with Grafana and InfluxDB. InfluxDB is a cool database specifically designed to work with time series data. Grafana is one open source tool used for time series analytics. I want to build a simple prototype. The idea is: One Arduino device (ESP32) emits an MQTT event to a Mosquitto server. I’ll use a potentiometer to emulate one sensor. For exa