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ESPHome devices

Shelly Plus Plug S: ESPHome

Shelly Plus Plug S (smart plugs, ESP32): GPIO pinout and a starter ESPHome config with relays, buttons, LED and power metering. Local Home Assistant control with no cloud.

Type
Smart plugs
Chip
ESP32
Region standard
EU

Pinout

PinFunction
GPIO25LED 1 & 2
GPIO26LED 3 & 4
GPIO9Button
GPIO4Relay
GPIO33Internal Temperature
GPIO19HLW8012 (power measurement)
GPIO10CF Pin
GPIO22CF1 Pin

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Starter ESPHome config

Built from the pinout above. Keys and the Wi-Fi password come from secrets.yaml in ESPHome. Check the pins against your hardware revision before flashing: one model can ship with different boards.

substitutions:
  name: shelly-plus-plug-s

esphome:
  name: ${name}
  friendly_name: "Shelly Plus Plug S"

esp32:
  board: esp32dev

logger:
api:
  encryption:
    key: !secret api_key
ota:
  - platform: esphome
    password: !secret ota_password
wifi:
  ssid: !secret wifi_ssid
  password: !secret wifi_password
  ap: {}
captive_portal:

switch:
  - platform: gpio
    pin: GPIO4
    id: relay1
    name: "Relay"  # Relay
    restore_mode: RESTORE_DEFAULT_OFF

binary_sensor:
  - platform: gpio
    pin:
      number: GPIO9
      mode: INPUT_PULLUP
      inverted: true
    name: "Button"  # Button
    on_press:
      - switch.toggle: relay1

status_led:
  pin:
    number: GPIO25
    inverted: false  # LED 1 & 2

# Other pins from the pinout:
#   GPIO26: LED 3 & 4
#   GPIO33: Internal Temperature
#   GPIO19: HLW8012 (power measurement)

How to flash

  • Most devices are flashed over UART: a 3.3 V USB-TTL adapter to RX, TX, GND and 3V3, holding GPIO0 to ground at power-on (ESP8266/ESP32). Mains power disconnected.
  • Beken (BK72xx) and Realtek chips are flashed with ltchiptool, or with cloudcutter without opening the case if the firmware allows it.
  • Details and board photos: the device page in the ESPHome database.

A config from scratch: ESPHome generator. Which pins are safe: pinout.

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