Okay I'm sold on home assistant but not the energy meter. There is literally nothing I need to know how much power it uses when I think about it. I turn everything off anyway that I don't need on. However I am sorely tempted now to get smart trvs. I take it a wide range are compatible with home assistant? Also the tablet you have wall mounted is it running an application or are you simply using a web browser and pointing it to home assistants IP? How does it get power? Have you installed a usb socket behind the wall mount and use a short lead?