Hi,
I have an ESP32 device that runs on batteries and I have a sensor that monitor the battery voltage, usually from 3,3v when it is fully charged to 2,9v when it is discharge.
I want to see in my dashboard when was the last time I charged the battery, and for that I would like to create a template sensor that compares the last 2 values of the voltage and if the volgate went up more than 0,3v then it means the battery was charged, I could find anything about checking last value and also previous value to do a diff between them.
Any recomendation for that?