Using an ESP8266 Dual Relay Combo Board with Home Assistant

Updated / improved version

uart:
  baud_rate: 115200
  tx_pin: GPIO1
  rx_pin: GPIO3

binary_sensor:
  - platform: status
    name: "Piec 2 Relay"

# Led de Estado
status_led:
  pin: GPIO2
  
switch:
  - platform: template    
    name: "Piec Relay 1"
    id: relay_1
    icon: mdi:fan
    optimistic: true
    turn_on_action:
     - delay: 10ms
     - uart.write: [0xA0, 0x01, 0x01, 0xA2]
    turn_off_action:
     - uart.write: [0xA0, 0x01, 0x00, 0xA1]
 
  - platform: template
    name: "Piec Relay 2"
    id: relay_2
    icon: mdi:fan
    optimistic: true
    turn_on_action:
     - delay: 10ms
     - uart.write: [0xA0, 0x02, 0x01, 0xA3]
    turn_off_action:
     - uart.write: [0xA0, 0x02, 0x00, 0xA2]