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ESPHome devices

Shelly 1PM Gen 4: ESPHome

Shelly 1PM Gen 4 (relays, ESP32): GPIO pinout and a starter ESPHome config with relays, buttons, LED. Local Home Assistant control with no cloud.

Type
Relays
Chip
ESP32
Region standard
UK, US, EU

Pinout

PinFunction
GPIO0LED (Inverted)
GPIO1Button
GPIO3NTC
GPIO4Relay
GPIO6UART Tx
GPIO7UART Rx
GPIO10Switch
GPIO12Add-on module Digital in
GPIO16Add-on module Data in
GPIO9Add-on module Data out
GPIO17Add-on module Analog in

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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-1pm-gen-4

esphome:
  name: ${name}
  friendly_name: "Shelly 1PM Gen 4"

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: GPIO1
      mode: INPUT_PULLUP
      inverted: true
    name: "Button"  # Button
    on_press:
      - switch.toggle: relay1

status_led:
  pin:
    number: GPIO0
    inverted: true  # LED (Inverted)

# Other pins from the pinout:
#   GPIO3: NTC
#   GPIO6: UART Tx
#   GPIO7: UART Rx
#   GPIO10: Switch
#   GPIO12: Add-on module Digital in
#   GPIO16: Add-on module Data in
#   GPIO9: Add-on module Data out
#   GPIO17: Add-on module Analog in

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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