Sonoff Dual R3 & Lite

Product Images

GPIO Pinout

based on https://esphome.io/devices/sonoff.html#sonoff-dual-r3-v1-x-v2-x

Sonoff Dual R3 Lite - PCB version 1.x

Pin	Function
GPIO13	Status LED (blue/inverted)
GPIO00	Push Button (inverted)
GPIO27	Relay 1 / LED 1 (red)
GPIO14	Relay 2 / LED 2 (red)
GPIO32	Switch 1 (inverted)
GPIO33	Switch 2 (inverted)

Sonoff Dual R3 - PCB version 1.x,2.x

Pin	Function
GPIO13	Status LED (blue/inverted)
GPIO00	Push Button (inverted)
GPIO27	Relay 1 / LED 1 (red)
GPIO14	Relay 2 / LED 2 (red)
GPIO32	Switch 1 (inverted)
GPIO33	Switch 2 (inverted)
GPIO25	power sensor UART Tx
GPIO26	power sensor UART Rx

For power measuring see CSE7761 Power Sensor (v1.x) or BL0939 Power Sensor (v2.x)

Basic Configuration

esphome:
  name: sonoff-dual-r3

esp32:
  board: esp32dev

logger:
  level: INFO

wifi:
  ssid: !secret wifi_ssid
  password: !secret wifi_password

api:
  encryption:
    key: !secret esp_api_key

ota:
  password: !secret ota_secret

sensor:
  - platform: wifi_signal
    name: "RSSI"
    id: sensor_rssi
    update_interval: 90s
    entity_category: "diagnostic"

  - platform: uptime
    name: "Uptime"
    id: sensor_uptime
    update_interval: 300s
    entity_category: "diagnostic"

button:
  - platform: restart
    name: "Restart"
    id: button_restart

light:
  - platform: status_led
    name: "LED"
    id: led_status
    pin:
      number: GPIO13
      inverted: True
    internal: True

switch:
  - platform: gpio
    name: "1"
    pin: GPIO27
    id: relay_1

  - platform: gpio
    name: "2"
    pin: GPIO14
    id: relay_2

binary_sensor:
  - platform: gpio
    name: "Button"
    id: sensor_button
    pin:
      number: GPIO00
      mode:
        input: True
        pullup: True
      inverted: True
    disabled_by_default: True
    icon: "mdi:radiobox-blank"
    filters:
      - delayed_on: 50ms
    on_press:
      - switch.toggle: relay_1

  - platform: gpio
    name: "1"
    pin:
      number: GPIO32
      mode:
        input: True
        pullup: True
      inverted: True
    filters:
      - delayed_on_off: 50ms
    on_press:
      - switch.turn_on: relay_1
    on_release:
      - switch.turn_off: relay_1

  - platform: gpio
    name: "2"
    pin:
      number: GPIO33
      mode:
        input: True
        pullup: True
      inverted: True
    filters:
      - delayed_on_off: 50ms
    on_press:
      - switch.turn_on: relay_2
    on_release:
      - switch.turn_off: relay_2

Dual R3 v1.x power meter configuration

uart:
  tx_pin: GPIO25
  rx_pin: GPIO26
  baud_rate: 38400
  parity: EVEN
  stop_bits: 1

sensor:
  - platform: cse7761
    update_interval: 21s
    voltage:
      name: "Voltage"
    current_1:
      name: "Current 1"
      disabled_by_default: True
    current_2:
      name: "Current 2"
      disabled_by_default: True
    active_power_1:
      name: "Power 1"
    active_power_2:
      name: "Power 2"

Dual R3 v2.x power meter configuration

uart:
  tx_pin: GPIO25
  rx_pin: GPIO26
  baud_rate: 4800
  parity: NONE
  stop_bits: 2

sensor:
  - platform: bl0939
    update_interval: 21s
    voltage:
      name: "Voltage"
    current_1:
      name: "Current 1"
      disabled_by_default: True
    current_2:
      name: "Current 2"
      disabled_by_default: True
    active_power_1:
      name: "Power 1"
    active_power_2:
      name: "Power 2"
    energy_1:
      name: "Energy 1"
    energy_2:
      name: "Energy 2"
    energy_total:
      name: "Energy Total"