Central Heating - Home Automation - Gas / Sun / Wood / Elektricity

How dit you do this? Hardware choices?

I have been looking for a raspberry zerro for a long time to run it with, recently I was able to buy an rpi4 2gb and I installed it. here runs a python script which sends mqtt messages to hass?

if you want to know more i can provide you with the info you need.
you can always send me a pm.