ESP32 Relay Board X16

Product description

This is a 16-relay board with an ESP32-WROOM-E.

Each relay has COM+NO+NC exposed and supports 10Amp max load. The relays are controlled by two Nexperia/NXP 8-bit 74HC595D shift registers with output latches.

The board is powered by 12VDC.

It is available on aliexpress.

GPIO Pinout

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

		IO0	GND	GND	RX	TX	3V3
3V3	IO6							3V3	GND
IO7	IO8							IO10	IO11
IO15	IO2							IO13	IO9
IO0	IO4							IO14	IO12
IO16	IO17							IO26	IO27
IO5	IO18							IO33	IO25
IO9	GND							IO35	IO33
IO21	IO3							IO39	IO34
IO1	IO22							EN	IO36
IO23	GND							3V3	GND

Basic Config

esphome:
  name: relay-x16

esp32:
  board: esp32dev

sn74hc595:
  - id: sn74hc595_hub
    data_pin: GPIO14
    clock_pin: GPIO13
    latch_pin: GPIO12
    oe_pin: GPIO05
    sr_count: 2

switch:
  - platform: gpio
    name: Relay01
    id: relay01
    pin:
      sn74hc595: sn74hc595_hub
      number: 0

  - platform: gpio
    name: Relay02
    id: relay02
    pin:
      sn74hc595: sn74hc595_hub
      number: 1

  - platform: gpio
    name: Relay03
    id: relay03
    pin:
      sn74hc595: sn74hc595_hub
      number: 2

  - platform: gpio
    name: Relay04
    id: relay04
    pin:
      sn74hc595: sn74hc595_hub
      number: 3

  - platform: gpio
    name: Relay05
    id: relay05
    pin:
      sn74hc595: sn74hc595_hub
      number: 4

  - platform: gpio
    name: Relay06
    id: relay06
    pin:
      sn74hc595: sn74hc595_hub
      number: 5

  - platform: gpio
    name: Relay07
    id: relay07
    pin:
      sn74hc595: sn74hc595_hub
      number: 6

  - platform: gpio
    name: Relay08
    id: relay08
    pin:
      sn74hc595: sn74hc595_hub
      number: 7

  - platform: gpio
    name: Relay09
    id: relay09
    pin:
      sn74hc595: sn74hc595_hub
      number: 8

  - platform: gpio
    name: Relay10
    id: relay10
    pin:
      sn74hc595: sn74hc595_hub
      number: 9

  - platform: gpio
    name: Relay11
    id: relay11
    pin:
      sn74hc595: sn74hc595_hub
      number: 10

  - platform: gpio
    name: Relay12
    id: relay12
    pin:
      sn74hc595: sn74hc595_hub
      number: 11

  - platform: gpio
    name: Relay13
    id: relay13
    pin:
      sn74hc595: sn74hc595_hub
      number: 12

  - platform: gpio
    name: Relay14
    id: relay14
    pin:
      sn74hc595: sn74hc595_hub
      number: 13

  - platform: gpio
    name: Relay15
    id: relay15
    pin:
      sn74hc595: sn74hc595_hub
      number: 14

  - platform: gpio
    name: Relay16
    id: relay16
    pin:
      sn74hc595: sn74hc595_hub
      number: 15