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ESPHome devices

Shelly 2.5: ESPHome

Shelly 2.5 (relays, ESP8266): GPIO pinout and a starter ESPHome config with relays, buttons, LED. Local Home Assistant control with no cloud.

Type
Relays
Chip
ESP8266
Region standard
UK, US, EU

Pinout

PinFunction
GPIO0LED 1i
GPIO2Button 1
GPIO4Relay 1
GPIO5Switch 2 Input
GPIO12i2c SDA
GPIO13Switch 1 Input
GPIO14i2c SCL
GPIO15Relay 2
GPIO16ADE7953 IRQ (power measurement)

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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-2-5

esphome:
  name: ${name}
  friendly_name: "Shelly 2.5"

esp8266:
  board: esp01_1m  # most plugs and relays have 1 MB flash; check yours

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 1"  # Relay 1
    restore_mode: RESTORE_DEFAULT_OFF
  - platform: gpio
    pin: GPIO15
    id: relay2
    name: "Relay 2"  # Relay 2
    restore_mode: RESTORE_DEFAULT_OFF

binary_sensor:
  - platform: gpio
    pin:
      number: GPIO2
      mode: INPUT_PULLUP
      inverted: true
    name: "Button"  # Button 1
    on_press:
      - switch.toggle: relay1

status_led:
  pin:
    number: GPIO0
    inverted: false  # LED 1i

# Other pins from the pinout:
#   GPIO5: Switch 2 Input
#   GPIO12: i2c SDA
#   GPIO13: Switch 1 Input
#   GPIO14: i2c SCL
#   GPIO16: ADE7953 IRQ (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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