I use a few smart power plugs which include an ESP microcontroller, a relais, and a power meter. These run tasmota and report to home assistant (compare e.g. https://blog.koehntopp.info/2020/05/20/gosund-and-tasmota/)

Now I don't want to buy new plugs for all devices which I might measure for some time: Eg.g the fridge has a very constant energy usage, measuring it once per season suffices for all I want to know.

When re-using a smart plug for a different device, I'd like Home Assistant not to connect the two measurement histories. Just renaming the device in tasmota web interface is not enough, though: Home Assistant identifies the devices by something else (probably serial number) and would connect the histories / track the rename.

I have to:

1. Remove the device in Home Assistant (Integrations > Tasmota > Select device > … menu)
2. Rename via Tasmota Web UI (I change Device Name and Friendly Name, probably only one is enough)
3. Only now reboot the Device
4. Seconds later, it shows up in Home Assistant under the new name