Shelly 1PM?

[michal_p]

@michal_p

  # Binary sensor for the button press
  - platform: gpio
    name: "${friendly_name} Input"
    pin:
      number: GPIO4
    on_state:
      - switch.toggle: relay
    #on_press:
    #  - switch.turn_on: relay
    #on_release:
    #  - switch.turn_off: relay

This part should solve your problem. Just comment out the toggle part and uncomment the rest. Let me know if it works. Thanks!