add a Relay Board ESP32

add a Relay Board ESP32 - ESPHome

To be able to switch certain relays in Home Assistant via an ESP32, I tested a relay board and integrated it via ESP-Home.

Necessary hardware

Besides an appropriate hardware for Home Assistant, I married an ESP32 with a 4-channel relay board:

ESP32 Dev Kit C V4 NodeMCU WLAN WiFi Development Board
on amazon.com:

HiLetgo ESP-WROOM-32 ESP32 ESP-32D Devel...

Product prices and availability cannot currently be accessed from Amazon. Check on Amazon.com
4-Channel Relay Board
on amazon.com:

SunFounder Lab 4 Relay Module 5V 4 Chann...

Product prices and availability cannot currently be accessed from Amazon. Check on Amazon.com

Wiring

As GPIO-PINs I used the PINS G25,26,32 and G33 for testing:

ESP-Home

If you already have the ESP32 connected to Home Assistant, you can add the relay board with the following lines:

...
switch:
  - platform: gpio
    pin: GPIO32
    name: Relay1
    id: relay1
  - platform: gpio
    pin: GPIO33
    name: Relay2
    id: relay2
  - platform: gpio
    pin: GPIO25
    name: Relay3
    id: relay3
  - platform: gpio
    pin: GPIO26
    name: Relay4
    id: relay4

This will make the relays show up as "controls" in Home Assistant.