[BK7231N on board] Flashing Anko Sunset Lamp (I004055) RGB LED lamp controller

#1 28 Aug 2023 07:52

This is a lamp sold by Kmart in Australia. Seems to be made by Mirabella but exclusively for the Kmart Anko brand. It went a bit nuts on TikTok late last year.
User manual:

Good news is (1) it's a 5v device (powered by USB) and (2) it's running a BK7231N inside. Doesn't seem to be a SoC/ESP type chip, just the BK7231N directly on a circuit board. Even more good news is that most of the pins are exposed and labelled on the underside of the board.

Photos:

Pin roles:
- P20 - button
- P6 - PWM (red)
- P7 - PWM (green)
- P8 - PWM (blue)

I was able to flash using LTChipTool (remembering to connect CEN to GND when it starts) using TX1 and RX1. Was a bit hit and miss, sometimes it would freeze at 0 or low %, but I eventually read the data from the chip and uploaded binary.

The LED bulbs are all exposed as a single RGB PWM output from the controller (R=6 G=7 B=8). The button on the controller is pin 20, inverted, with pullup active.

OBK Config:

ESPHome config (snippet, add your own Wifi etc):


binary_sensor:
  - platform: gpio
    name: Button
    pin:
      number: P20
      mode:
        input: true
        pullup: true
      inverted: true


output:
- platform: ledc
  id: output_red
  pin: P6
- platform: ledc
  id: output_green
  pin: P7
- platform: ledc
  id: output_blue
  pin: P8

light:
- platform: rgb
  id: light_rgb
  name: Light
  red: output_red
  green: output_green
  blue: output_blue

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