Which pins control each LED channel?
PWM0=Blue, PWM1=Green, PWM2=Red, PWM4=Warm-White, PWM5=Cool-White [Elektroda, NorthernMan54, post #20394984]
Globe 4" Smart Recessed Led Lighting Kit RGBCW ( WB2S - BK7231T ) - Teardown
TL;DR 
- The Globe 4" Smart Recessed LED Lighting Kit RGBCW, internal part number 50323, supports RGB plus tunable white from 2000K to 5000K.
- The module sits in a plastic box attached to the LED, and one screw opens it for a very simple teardown.
- UART flashing is straightforward because the board needs no trace cuts or module removal; grounding CEN starts the upload with uartprogram.
- The wiring maps PMW0 to blue, PMW1 to green, PMW2 to red, and PMW4/PMW5 to white channels, with a pair of SM15633EK LED driver chips onboard.
- OpenBK7231T configuration is still being worked out because the unit stays in white mode, so a similar Globe 4-Inch 9W Downlight 50359 was used as a reference.
AI summary based on the discussion. May contain errors.
This is a pretty straight forward LED Lighting kit, with a very simple tear down. It's best feature is support for RGB and Tunable White ( 2000K to 5000 K ). The internal part number is 50323.
The module is within a plastic box attached to the LED, so you just need to undo one screw to open it and get access to the module.
Connecting it to your uart is straight forward, and you do not need to remove it from the board or cut any traces. I just wired it up, started the upload with the command
And grounded CEN for a second for the upload to start.
Taking a look at the wiring it appears to have these connections
PMW0 - Blue
PMW1 - Green
PMW2 - Red
PMW4 - W ( Not sure what W is )
PMW5 - C ( Not sure what C is, color temperature ? )
And in tracing the circuit, identified that it is using a pair of SM15633EK to drive the LED's. After some intense googling, found some details here on the chip - https://www.dianyuan.com/bbs/2511027.html
Am currently trying to determine the configuration needed for OpenBeken, as the unit is constantly in white mode. ( maybe its defective ). I did for these details for a similar unit from globe - https://www.esphome-devices.com/devices/Globe-4-Inch-9W-Downlight-50359
For a configuration I used this, and I also set Flag 3, so I could play with the PWM channels individually.
The module is within a plastic box attached to the LED, so you just need to undo one screw to open it and get access to the module.
Connecting it to your uart is straight forward, and you do not need to remove it from the board or cut any traces. I just wired it up, started the upload with the command
python3 uartprogram -d /dev/cu.SLAB_USBtoUART -w OpenBK7231T_UA_1.15.344.bin And grounded CEN for a second for the upload to start.
Taking a look at the wiring it appears to have these connections
PMW0 - Blue
PMW1 - Green
PMW2 - Red
PMW4 - W ( Not sure what W is )
PMW5 - C ( Not sure what C is, color temperature ? )
And in tracing the circuit, identified that it is using a pair of SM15633EK to drive the LED's. After some intense googling, found some details here on the chip - https://www.dianyuan.com/bbs/2511027.html
Am currently trying to determine the configuration needed for OpenBeken, as the unit is constantly in white mode. ( maybe its defective ). I did for these details for a similar unit from globe - https://www.esphome-devices.com/devices/Globe-4-Inch-9W-Downlight-50359
For a configuration I used this, and I also set Flag 3, so I could play with the PWM channels individually.
Comments
Hello, C is Cool White and W is Warm White. Those are channels used for CCT mode. Please do not set Flag 3 - [LED][Debug] Show raw PWM controller on WWW index instead of new LED RGB/CW/etc picker ... [Read more]
Well after spending some time reviewing my work, I found my issue with the lights being stuck on white. I had a solder bridge between PMW4 and tx. After removing the bridge it worked perfectly. My... [Read more]
can anyone find the spec sheet for SM15633EK, in any language? can anyone advise the correct PWM frequency? [Read more]
Why do you need SM15633 datasheet? The PWM frequency used by Tuya is as far as I know either 1000Hz or 600Hz. In OBK, you can configure any supported PWM frequency by hardware. I'm searching, found... [Read more]
Got another batch of these and am busy flashing them. A couple of notes for myself if I do them again. When flashing with a Mac mini M4, do not use a USB Hub, but a straight cable. Used a cp2102... [Read more]