Shelly Dimmer 2 momentary switch response time too long

  • Hello,

    I recently bought a few Shelly Dimmer 2 and dimmable led lamps to replace legacy mechanical relays and standard bulbs. The Shellies are connected to the original momentary buttons.

    When I turn on or off the lights from the web interface of the Shellies, the light actually turns on or off immediately. When I use the momentary button, however, it takes approx 1 second before the module detects the command and the light changes state. I have reduced the debounce time to 60 (minimum) and the fade time is 0, but the delay is the same.

    The wiring diagram is attached to this message, the switch is a standard NO mechanical switch.

    Note that I'm not using the Shelly cloud but the MQTT interface instead.

    Please help - thank you.

    best regards!


  • Same Here...

    If you set it to „toggle switch“, the dimmer turns on instantly - so I believe, the dimmer is waiting if there is another signal following.

    As a main switch, this is too slow for me to be used throughout the house 😒

    Was dimmer 1 faster there?

  • Hi,

    Same here... Not very satisfied. With app or Home assistant it's fast enough.

    May be it's possible to detect button press in HA and trigger light ? Don't know if it will be faster.

  • Same issue here, updated to latest firmware but no luck.

    This is very annoying and I bought six devices :-(((

    Has someone managed to remove the physical button delay?