I have several zigbee devices, and I want to create a group or template, with battery status of all my zigbee devices, and then when one of them reaches a battery level less than 20%, send me a notification, with the name of the zigbee device…
What is the best way to do it, or even, it is possible?
There’s a pretty good blueprint included in HA for battery notifications. You can also choose to expand it and adjust the code. There’s also a very configurable battery card to show you the ones running low: