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ESPHome devices

Topeler YSW102 Wall Outlet: ESPHome

Topeler YSW102 Wall Outlet (smart plugs, BK72XX): GPIO pinout and a starter ESPHome config with relays, buttons, LED. Local Home Assistant control with no cloud.

Type
Smart plugs
Chip
BK72XX
Region standard
US

Pinout

PinFunction
P8PWM2
P10RX1
P11TX1
P26PWM5

Find it in shops: AliExpress

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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: topeler-ysw102-wall-outl

esphome:
  name: ${name}
  friendly_name: "Topeler YSW102 Wall Outlet"

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:

# Other pins from the pinout:
#   P8: PWM2
#   P10: RX1
#   P11: TX1
#   P26: PWM5

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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