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ESPHome devices

LoraTap In-Wall SC411WSC: ESPHome

LoraTap In-Wall SC411WSC (wall switches, BK72XX): GPIO pinout and a starter ESPHome config with relays, buttons, LED. Local Home Assistant control with no cloud.

Type
Wall switches
Chip
BK72XX
Region standard
GLOBAL

Pinout

PinFunction
P6Green LED all buttons (inverted)
P24Yellow Led top button (inverted)
P8Yellow Led middle button (inverted)
P14Open Relay L2
P26Close Relay L1
P23Open button
P7Stop button
P9Close button

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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: loratap-in-wall-sc411wsc

esphome:
  name: ${name}
  friendly_name: "LoraTap In-Wall SC411WSC"

bk72xx:
  board: generic-bk7231n-qfn32-tuya  # BK7231T or BK7231N: check the chip marking

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: P14
    id: relay1
    name: "Relay 1"  # Open Relay L2
    restore_mode: RESTORE_DEFAULT_OFF
  - platform: gpio
    pin: P26
    id: relay2
    name: "Relay 2"  # Close Relay L1
    restore_mode: RESTORE_DEFAULT_OFF

binary_sensor:
  - platform: gpio
    pin:
      number: P6
      mode: INPUT_PULLUP
      inverted: true
    name: "Button 1"  # Green LED all buttons (inverted)
    on_press:
      - switch.toggle: relay1
  - platform: gpio
    pin:
      number: P24
      mode: INPUT_PULLUP
      inverted: true
    name: "Button 2"  # Yellow Led top button (inverted)
    on_press:
      - switch.toggle: relay2
  - platform: gpio
    pin:
      number: P8
      mode: INPUT_PULLUP
      inverted: true
    name: "Button 3"  # Yellow Led middle button (inverted)
    on_press:
      - switch.toggle: relay1
  - platform: gpio
    pin:
      number: P23
      mode: INPUT_PULLUP
      inverted: true
    name: "Button 4"  # Open button
    on_press:
      - switch.toggle: relay1
  - platform: gpio
    pin:
      number: P7
      mode: INPUT_PULLUP
      inverted: true
    name: "Button 5"  # Stop button
    on_press:
      - switch.toggle: relay1
  - platform: gpio
    pin:
      number: P9
      mode: INPUT_PULLUP
      inverted: true
    name: "Button 6"  # Close button
    on_press:
      - switch.toggle: relay1

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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