[WB3S] Flashing Ledvance Smart+ WiFi Planon Plus with CloudCutter / OpenBeken - RGB ring compatible?

Hi everyone!
I recently got my hands on a Ledvance Smart WiFi Planon Plus, which is a square ceiling LED panel (30x30 in my case) with a special feature: an RGB ring around the inner panel. Upon researching how to flash this with custom firmware to make it compatible with MQTT, I found this forum, and in particular, these posts:

- https://www.elektroda.com/rtvforum/topic4025977.html - [BK7231N / WB3S] Teardown and flashing of LEDVANCE SMART PLANON PLUS tunable white 30x30 45x45 30x6
- https://www.elektroda.com/rtvforum/topic4003820.html - [BK7231T][WB3S] Ledvance SMART Sun@Home Planon CCT light Unable to control via WebUI}

I took apart my lamp's LED control box and discovered a WB3S microcontroller, so I am quite sure it should be possible to use OpenBeken / CloudCutter. However, there is one thing that is currently keeping me from doing so: the post in question is for a slightly different model of lamp that does not have the outer RGB ring, only the inner LED panel. I also wasn't able to find any further information on this forum (might be due to my poor searching skills), so here's my question: if I were to use CloudCutter on this WB3S-controlled lamp, would it be possible to restore the full functionality including the RGB ring? Could I accidentally break something if I tried the wrong settings while debugging? And how would I go about coming up with the pin configuration in the first place?

Thank you, and sorry if this is a bit all over the place. It's my first post here.
- LW
AI: Could you provide the specific model number or version of your Ledvance Smart WiFi Planon Plus? This will help in determining compatibility with the RGB ring.
4058075752603
AI: Have you had any previous experience with flashing similar devices, or is this your first attempt? This will help in providing more tailored guidance.
I have experience with flashing ESP8266s and other microcontrollers. I'm a software developer and ex sysadmin, so I should be able to handle anything regardless of complexity. I also don't shy away from soldering.

We need more information. First of all, can the ring only have a single color at given time (like PWM LEDs), or is it per-pixel colors like WS2812?

How the LED ring control looks like in the Tuya App?

Can you take off the case and peek inside the device?

Why do you want to use cloudcutter, UART method is more reliable and provides full 2MB flash backup. It should be easy, but it depends on device internals:


For pins, you can use extraction method:


Or GPIO Doctor: https://www.elektroda.com/rtvforum/topic3976371.html

If your device is a simple variation of RGB (single color at time) + CW (aka CCT) then it should be no different than any other RGBCW bulb and very easy to configure.

Hmmm you're saying that your device is using WB3S? If that's the case, then I don't think that WB3S has SPI MOSI data pin available which is used for WS2812 LEDs, so I would suspect that your device is using "single color RGB" (aka PWM), which is very simple to handle... so the configuration should be very easy.... but any photos of WB3S board and wiring can still gives us more insights.

Hi!
As a preface, to avoid wasting time: Unfortunately, I've killed the device during my experiments after posting my original post. Shorted something out and had the magic smoke of death as well as a popped breaker. Oops...

p.kaczmarek2 wrote:

can the ring only have a single color at given time (like PWM LEDs), or is it per-pixel colors like WS2812?

It's a single-color ring, so it should be like PWM LEDs.

p.kaczmarek2 wrote:

How the LED ring control looks like in the Tuya App?

Ledvance has their own app, while it's tuya based, the normal tuya app doesn't work. In the ledvance app, I have a color slider (left to right) that has the color spectrum in it, as well as a few preset colors, an intensity and a brightness slider.

p.kaczmarek2 wrote:

Can you take off the case and peek inside the device?

Only the control box, as looking into the LED panel itself would probably break the insulation and stuff. It's a metal sheet glued to some foam, a diffuser, etc. Probably not possible nondestructively, if I were to grab another one.

p.kaczmarek2 wrote:

Why do you want to use cloudcutter, UART method is more reliable

I tried using CC because it would have been easier than extracting the WB3S. CC didn't work (probably patched), so I tried a CH340G to do it via UART. It seems my CH340G was dead because it kept disconnecting and reconnecting every 2 seconds.

p.kaczmarek2 wrote:

but any photos of WB3S board and wiring can still gives us more insights.

Since I unfortunately killed this one during reassembly after doing some testing (I believe it was caused by a screw that accidentally fell onto the board and shorted something), I don't think it's worth putting more time into this for now.

I'm really thankful that you took your time to respond, and sorry that it had to come to this abrupt end here. I should've been more careful.
I hope you have a good holiday time and a happy new year!
- LW

I think that WiFi module should be still alright. You can still take 2MB backup and get Tuya config, which will be useful for other users. You could also still use WiFi module in other DIY projects.

p.kaczmarek2 wrote:

You can still take 2MB backup and get Tuya config, which will be useful for other users

True. I don't currently have a working CH340G as mine is probably also dead, so it'll take a while. But I will do it when I grab a new CH340G adapter someday. Thanks again!