Sonoff 4ch Pro R2 with ESPHome

January 17, 2022

In this post, I am going to talk about the process of converting the Sonoff 4CH Pro R2 to ESPHome and how to now connect it to Home Assistant

Tools needed

FTDI Converter
Dupont cables
USB Cable
Sonoff 4ch Pro R2
ESPHome YAML code
ESPHome Flasher
Home Assistant

FTDI Converter

Needed to transfer the compiled .bin to the Sonoff 4Ch Pro, only needed with initial flash from factory firmware to 3rd party firmware.

Dupoint cables

Creates the connection from the FTDI converter to the actual device.

USB Cable

Connects the FTDI converter to the computer

Cable connections

Computer → USB Cable → FTDI Converter → Dupont cables → Sonoff 4ch Pro R2

Sonoff 4Ch Pro R2

This is the device we are going to convert to ESPHome firmware

ESPHome Yaml

Remember to use secrets (! secret)
You can find the file here

# Basic Config
esphome:
  name: sonoff_4chpror2
  platform: ESP8266
  board: esp01_1m

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

api:

# Example configuration entry
web_server:
  port: 80

logger:

ota:

binary_sensor:
  - platform: gpio
    on_press:
      then:
        - switch.toggle: button_1
    pin:
      number: GPIO0
      mode: INPUT_PULLUP
      inverted: True
    name: "Sonoff 4CH Button 1"
  - platform: gpio
    on_press:
      then:
        - switch.toggle: button_2
    pin:
      number: GPIO9
      mode: INPUT_PULLUP
      inverted: True
    name: "Sonoff 4CH Button 2"
  - platform: gpio
    on_press:
      then:
        - switch.toggle: button_3
    pin:
      number: GPIO10
      mode: INPUT_PULLUP
      inverted: True
    name: "Sonoff 4CH Button 3"
  - platform: gpio
    on_press:
      then:
        - switch.toggle: button_4
    pin:
      number: GPIO14
      mode: INPUT_PULLUP
      inverted: True
    name: "Sonoff 4CH Button 4"
  - platform: status
    name: "Sonoff 4CH Status"

switch:
  - platform: gpio
    id: button_1
    name: "Sonoff 4CH Relay 1"
    pin: GPIO12
  - platform: gpio
    id: button_2
    name: "Sonoff 4CH Relay 2"
    pin: GPIO5
  - platform: gpio
    id: button_3
    name: "Sonoff 4CH Relay 3"
    pin: GPIO4
  - platform: gpio
    id: button_4
    name: "Sonoff 4CH Relay 4"
    pin: GPIO15

output:
  - platform: esp8266_pwm
    id: blue_led
    pin: GPIO13
    inverted: True

light:
  - platform: monochromatic
    id: status_led
    name: "Sonoff 4CH Blue LED"
    output: blue_led

ESPHome Flasher

Currently found here

Home Asisstant

Great guide here to install the integration.

Added the flashed ESPHome device to Home Assistant using the ESPHome integration