Backup for when HA connection is lost

[VIMVa]

Maybe have a look here as apparently that code works:

Push button dimmer - how?

This is my solution by using a single touch button. works nice & clean. light: - platform: monochromatic name: "Livingroom Ceiling light" id: light_0 output: light_0_out # Example output entry output: - platform: esp8266_pwm id: light_0_out pin: D4 inverted: true binary_sensor: - platform: gpio pin: D2 id: light_0_touch on_click: then: - if: condition: light.is_off: light_0 then: light.…

One of many Google results on your question.