Low battery alert for sensor notification?

[ardysusilo (Ardy)]

Automation Trigger: list of devices

I’ve combined the suggestions provided by Petro and Mariusthvdb then added a few of my own ideas to create the following sensor and automation. I’ve tested them and confirmed they work. This Template Sensor’s state reports the number of sensors with low batteries. The names of the corresponding sensors are reported in its battery_low attribute and are stripped of the words “battery level” in order to make them more compact. [Screenshot from 2020-07-17 11-58-44] The Template Sensor is refresh…