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
- 4-Channel Relay Board
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.
Use in practice: Heating control
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