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Device Type:relay
Electrical Standard:global
Board:esp32

ESP32 Relay x2

Product

Description​

A 2-relay board with an ESP32-WROOM-32E.

Each relay has COM/NO/NC terminals and is rated for a 10 A max load.

The board can be powered either via 7-30 VDC or 5 VDC (separate terminals).

An onboard button is connected to GPI00, and an onboard LED is connected to GPIO23.

It can be found on eBay and Aliexpress from multiple sellers.

GPIO Pinout​

The board has headers for every GPIO pin on the ESP32. They are labeled on the reverse side of the board.

Pin Functions​

PinComment
GPIO0Onboard button
GPIO16Relay 1 (Outermost)
GPIO17Relay 2
GPIO23LED

Programming​

Programming was done with a CP2102N USB-to-serial converter via the 6 pin header. The header is not a FTDI compatible pinout. ESPHome Web tools was able to flash the board after using the onboard buttons to enter programming mode.

Basic Config​

esphome:
  name: esp32-relay-x2

esp32:
  board: esp32dev

# LED exposed as binary light
output:
  - platform: gpio
    pin: GPIO23
    id: output_led

light:
  - platform: binary
    id: light_led
    name: LED
    output: output_led

# Relays exposed as switches
switch:
  - platform: gpio
    pin: GPIO16
    id: relay_1
    name: Relay 1

  - platform: gpio
    pin: GPIO17
    id: relay_2
    name: Relay 2