How to identify Platform and Board on KOAANW 810lm 9W bulb

Tags: #<Tag:0x00007f77ff585628>

I got myself this bulb or a very similar one (you never really know what you get):


I found a reference to a very similar bulb here:

I did not plan to use the tuya cloud to control it. So I used tuya-convert to flash it with tasmota.
After playing around with MQTT and not really falling in love for that option, I decided to move over to ESPHome as that just appears to be the better option for my HomeAssistant setup.
I had to flash to a tasmota-minimal.bin first but was then able to flash an ESPHome bin that I compiled on guessing = platform: ESP8266; board: esp01
I did select the ESP8266 platform and I am quite sure that should fit here but how can I identify the correct board? The bulb is closed and sealed. I can connect with ESPHome and flash different settings but none have worked so far. Here is my current .yaml for a starting point:

substitutions:
  devicename: mylight

esphome:
  name: $devicename
  platform: ESP8266
  board: esp01

wifi:
  ssid: !secret wifi_ssid
  password: !secret wifi_password

# Enable logging to ESPHome
logger:

# Enable Home Assistant API
api:
  password: !secret api_password

# Setup OTA password
ota:
  password: !secret ota_password

# Define output pins
output:
  - platform: esp8266_pwm
    id: output_red
    pin: GPIO4
  - platform: esp8266_pwm
    id: output_green
    pin: GPIO12
  - platform: esp8266_pwm
    id: output_blue
    pin: GPIO14
  - platform: esp8266_pwm
    id: output_warm_white
    pin: GPIO13
  - platform: esp8266_pwm
    id: output_cold_white
    pin: GPIO5

# Define a light entity
light:
  - platform: rgbww
    name: $devicename
    id: $devicename
    red: output_red
    green: output_green
    blue: output_blue
    warm_white: output_warm_white
    cold_white: output_cold_white
    cold_white_color_temperature: 6200 K
    warm_white_color_temperature: 2800 K

It is probably an esp8285.

But more fundamentally the tasmota example uses a my9291. You’ll need to use that if yours is the same.