Mysensors is nice, but for your task with ESP2866 I can recommend ESPeasy. 30 min and you are done.

That's why I bought shielded modules

@mfalkvidd I can have it output in either 12V or 24V - my choice. I have various SRD-12VDC-SL-C octocoupler relays, but I have no idea how to set it up as a sensor instead of an actuator. :( @gohan see my reply to mfalkvidd I had a look at the Power Meter Pulse Sensor but I am clueless on how to transfer it to my components. Thanks again for taking the time to help.

@Yveaux do you also use Grafana in order to visualize the data? I am not sure what fields/attributes are necessary despite "time" and "value" for a binary sensor.

@MaKin Hi! What arduino are you using as gateway? How have you configured the mysensors component in home assistant? So at home a similar setup is working together with home assistant, but at school it doesn't? What's the difference between the two environments, hardware and software -wise?

@MaKin I have not done this build, but if I had to do it I will try with this The most complicated is to find the Raid Power Sprayer :-)

Happy to help and great to hear about user stories and also any feedback, both when things are working and when things are not working or missing features.

19 days ago .. I hope i dont wake the dead .. on my latest projects I bagen using this nice stuff: http://www.hornbach.de/shop/Hartschaumplatte-3x250x500-mm-schwarz/3888008/artikel.html