I used to have this in my bathroom until a couple of weeks ago, so have found another use for it, but when I add it back into HA it comes up without a name… i.e. binary_sensor.sensor_2 or sensor.temperature_2
Any ideas please? it is mains powered and has been fully factory reset and is set as a binary sensor. Plus given it a new name and it doesn’t appear in the sensors name as I would expect binary_sensor.kitchen.sensor
Been several threads on this (I too was affected similarly) - Try stopping HA, renaming entity_registry.yaml and restart HA. It should pick up the new name you gave it.