Sonoff DW2 no longer shows battery status

[cyn]

I think I found an answer for you, take a look at this thread.

Sonoff DW2 wifi - Home Assistant Switch to Binary, and get last state when unavaliable

I solved this way: - platform: template sensors: puertaentrada_battery_perc: friendly_name: "PuertaEntrada_battery_perc" unit_of_measurement: "%" value_template: "{{ ((states('sensor.sonoff_1000e0e148_battery_voltage')|float-2)/(0.01)|float)|round(0) }}"