One of the things I wanted to do to switch from Domoticz to Home Assistant was to put new temperature sensors in all areas of our house. In Domoticz I used various Oregon Scientific sensors, which I then read with RFXCom. Because I didn’t want to invest in more RFXcom sensors and I didn’t have sensors for all rooms, I decided to use another option. Nabu Casa, the company behind Home Assistant, acquired ESPHome earlier this year.

To transfer the information from my smart meter from Domoticz to Home Assistant I use an extra application dsmr-reader, which reads the smart meter, stores the data in a local PostgreSQL database and shares it with Home Assistant, MQTT and InfluxDB, among others. Every night dsmr-reader uploads the information about the gas consumption to Mindergas.nl. For this installation I installed dsmr-reader on a Raspbery Pi and then connected the USB cable.