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ESPHome devices

Generic 2CH Wifi Curtain Module: ESPHome

Generic 2CH Wifi Curtain Module (other devices, BK72XX): GPIO pinout and a starter ESPHome config with relays, buttons, LED. Local Home Assistant control with no cloud.

Type
Other devices
Chip
BK72XX
Region standard
GLOBAL

Pinout

PinFunction
GPIO11S1, Curtain1 Open switch
GPIO10S2, Curtain1 Close switch
GPIO9S3, Curtain2 Open switch
GPIO8S4, Curtain2 Close switch
GPIO4L1, to Curtain1 Open motor
GPIO17L2, to Curtain1 Close motor
GPIO20L3, to Curtain2 Open motor
GPIO2L4, to Curtain2 Close motor
GPIO19LED

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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: generic-2ch-wifi-curtain

esphome:
  name: ${name}
  friendly_name: "Generic 2CH Wifi Curtain Module"

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:

status_led:
  pin:
    number: GPIO19
    inverted: false  # LED

# Other pins from the pinout:
#   GPIO11: S1, Curtain1 Open switch
#   GPIO10: S2, Curtain1 Close switch
#   GPIO9: S3, Curtain2 Open switch
#   GPIO8: S4, Curtain2 Close switch
#   GPIO4: L1, to Curtain1 Open motor
#   GPIO17: L2, to Curtain1 Close motor
#   GPIO20: L3, to Curtain2 Open motor
#   GPIO2: L4, to Curtain2 Close motor

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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