Litemate LM044 SmartHome LED Lamp Teardown: WiFi, BK7231N, BP5758 Driver

Teardown of Litemate LM044: SmartHome WiFi LED Lamp 9W B22 BK7231N (CBLC5) with BP5758 driver

Packaging:


Bulb with markings:


Prise out the press fitted electrical contacts:


Loosen silicone sealant before twisting the plastic bulb cover back and forth to free it:


First sight of the BP5758 driver and four pin connector surrounded by Red, Green and Blue LEDs as well as Cool and Warm white LEDs:


Close up of driver, and LEDs:


Board CX2228 with daughter-board CBLC5:


Bottom of board showing traces and SMDs:


Back of daughter-board CBLC5 :


Front of daughter-board CBLC5 with BT7321N behind sticker:


Front of daughter-board CBLC5 with sticker removed to show BT7321N:



Tracing data and clock pins
J4 - P4 on BP5758 SCL
J3 - P3 on BP5758 SDA
J2 -
J1 - P2 on BP5758 High Voltage Input

J4 - CBLC5 PWM0 P6
J3 - CBLC5 PWM4 P24

Ergo:
BP5758 S-Clock =PWM0 (P6)
BP5758 S-Data = PWM4 (P24)

Mapping order:
Red: 1
Green: 0
Blue: 2
Cool: 4
Warm: 3

Pin-out References:
https://github.com/dbuezas/esphome-bp5758/blob/main/BP5758D_EN_DS_Rev.1.1.pdf
https://docs.libretiny.eu/boards/cblc5/#pinout
AI: Did you encounter any issues or have specific questions about the components or functionality during the teardown?
Order of LEDs was off but specifying a mapping order sorted that out.

https://github.com/OpenBekenIOT/webapp/commit/9a1a2d096dfde4fbce3998f92f192be09e69d487

did you set powersave?
did you happen to take a factory firmware backup?
you can also set current with BP5758D_Current command - your factory values may be in boot log from original firmware and/or in config extraction json

https://github.com/openshwprojects/OpenBK7231T_App/blob/main/docs/commands-extended.md

>>21502002

I did not try to set powersave.

I did save this from a couple of bulbs:
BK7231N_TuyaConfig_obk0868????.bin

Would that contain the factory values?

maybe.
run it through easy flasher

>>21502814

I would have, but I don't have any Windows machines, and trying to use Mono was a failure.

Feel free to send it me and I'll have lookie