B16M Digital Input

[admin]

if you are using ESPHome yaml for home assistant. you need config ymal let INPUT toggle OUTPUT. you can see this yaml demo, it use by KinCony KC868-A8S board, but as same as your B16M. just add line for INPUT toggle OUTPUT.
https://www.kincony.com/forum/showthread.php?tid=1946

Code:

binary_sensor:
  - platform: gpio
    name: "input1"
    on_press:
      then:
        - switch.toggle: light1
    pin:
      pcf8574: pcf8574_hub_in_1
      number: 0
      mode: INPUT
      inverted: true