Sonoff, Esphome

sonoff.yaml

esphomeyaml:
  name: sonoff_1
  platform: ESP8266
  board: esp01_1m

wifi:
  ssid: ''
  password: ''
  
  manual_ip:
    static_ip: 192.168.1.80
    gateway: 192.168.1.1
    subnet: 255.255.255.0
    
# Enable logging
logger:

# Enable Home Assistant API
api:

ota:

switch:
  - platform: gpio
    id: relay
    name: "Internal Relay (1)"
    pin: GPIO12
    restore_mode: always off  # on boot, always start as off - failsafe  
    internal: yes
  # Use this to control the relay in HA:
  - platform: template
    name: "Sonoff S20 Relay (1)"
    lambda: return id(relay).state;
    turn_on_action:
    - switch.turn_on: relay
    turn_off_action:
    - switch.turn_off: relay
    
binary_sensor:
  - platform: gpio
    pin:
      number: GPIO0
      mode: INPUT_PULLUP
      inverted: True
    name: "Sonoff S20 Button"
    on_press:
    - switch.toggle: relay
    internal: yes