Tom's Life Bits

This example was for a Sonoff but should be similar for a Linksprite R4.

switch:
  - platform: mqtt
    name: "Den LED"
    state_topic: "stat/sonoff/POWER1"
    command_topic: "cmnd/sonoff/POWER1"
    availability_topic: "tele/sonoff/LWT"
    qos: 1
    payload_on: "ON"
    payload_off: "OFF"
    payload_available: "Online"
    payload_not_available: "Offline"
    retain: false

  - platform: mqtt
    name: "Den Fan"
    state_topic: "stat/sonoff/POWER2"
    command_topic: "cmnd/sonoff/POWER2"
    availability_topic: "tele/sonoff/LWT"
    qos: 1
    payload_on: "ON"
    payload_off: "OFF"
    payload_available: "Online"
    payload_not_available: "Offline"
    retain: false