ESP32 Relay Board x8

Product description

This is a 8-relay board with an ESP32-WROOM-E.

Each relay has COM+NO+NC exposed. Product descriptions don’t seem to specify maximum load. Each relay supports 10Amp max load, acconding to the label.

The board can be powered either via 7-30VDC or via 5VDC (separate connectors). It draws about 100mA with the relays off, and just over 500mA with all the relays on.

I bought it from: https://www.aliexpress.us/item/3256802045374301.html

GPIO Pinout

This board has headers for every GPIO pin on its ESP32.

Pin	Comment
5V	Do not use 5V for programming
TX	Exposed on board 3.3V level!
RX	Exposed on board 3.3V level!
GND
GND
GPIO0	3.3V level! (Connected to a push button for programing)
GPIO23	On-board general purpose LED
GPIO32	Relay 1
GPIO33	Relay 2
GPIO25	Relay 3
GPIO26	Relay 4
GPIO27	Relay 5
GPIO14	Relay 6
GPIO12	Relay 7
GPIO13	Relay 8

Basic Config

esphome:
  name: ESP32 relayboard

esp32:
  variant: esp32
  framework:
    type: esp-idf

# Status LED
status_led:
  pin:
    number: 23

# 8 relay outputs, exposed as switches in Home Assistant
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
  - platform: gpio
    pin: GPIO27
    name: Relay5
    id: relay5
  - platform: gpio
    pin: GPIO14
    name: Relay6
    id: relay6
  - platform: gpio
    pin:
      number: 12
      ignore_strapping_warning: true
    name: Relay7
    id: relay7
  - platform: gpio
    pin: GPIO13
    name: Relay8
    id: relay8