this post was submitted on 14 Mar 2026
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Just a thought about the Switch. Maybe you could plug it into a Powersocket that is monitored in HA, like a NOUS A1-T? If power draw goes up, the Switch is on. This could easily be "hacked" by the kids by plugging the switch into another Powersocket. But if the Switch has a reliable Standby power draw, that could be monitored too. If that is zero, the someone is cheating :-)
Monitoring the Switch when not docked, could maybe done via WiFi? Check if the MAC (or the IP if fixed via DHCP) is online or not. Of course this also helps if the Switch is always Online when used. I do not have one, so I do not know.
That's actually not a bad idea with the charging. I don't currently have a smart socket like that but it's definitely something I could pick up and test. They should be returning it to charge after use anyways, so we can set that as a rule so that it's always properly charged.
I wonder if I could tell the difference in power use between plugged in to charge, plugged in and playing, and plugged in charging AND playing. Maybe just the first two. Needs testing.
I did a quick search to see if there are any smart USB chargers that also report the Device Information rather than just on/off status, and couldn't find anything. That would be useful since it is part of the USB standard to be able to collect that information when a device is plugged in.