Adding Tuya BL-XK01 Star Projector Light to OpenBeken: Configuring, Pin Values & Device Profile

Hello! I've just bought a generic Tuya BL-XK01 star projector light and used Tuya-cordcutter to flash OpenBeken to it successfully.

I imagine it's close to the Genio projector shown here, but not enough. Using the pin config from that post allows for some RGB control using the 5 PWM sliders and the dimmer, but not predictably. The "LED RGB color" option does not react at all, and "toggle light" only adjusts PWM values.

The device profile from cloudcutter is here: https://github.com/tuya-cloudcutter/tuya-clou...es/tuya-generic-bl-xk01-music-star-light.json

What is the process for me to find the correct pin values and have this device added to the HCL? Thanks!

Edit: using the "Nedis Smartlife LED strip" device profile via the webapp improves some settings. The LED dimmer works and the "toggle light" button turns PWM1 to PWM3 off, while keeping 4 and 5 manual. The LED RGB color picker also works if PWM4 and 5 are kept off. I'm not sure what PWM5 is, but 4 appears to be the white LED.

Hello,
please clear the current config first. Make sure there are no scripts in autoexec.bat and in the short startup command.
Then try followng settings:
- red - P9 - (channel 0)
- green - P24 - (channel 1)
- blue - P26 - (channel 2)
- cool - P8 - (channel 3)
I am not sure about white channel yet. It doesn't seem to be present in the JSON data. Maybe this device is somehow emulating it.

Can you post some photos of the device, both from outside and the internals? I would like to see if warm white LEDs are there.

Here are some pictures of the insides. The black cable is the one that connects to the LED board and has color values marked. Hopefully that helps! I'll update this post with the pin values once I put it back together.

There are indeed two types of diode - RGB and cool white (I guess? YOu'd have to check if they are cool or warm). So 4 PWM channels for LED.

What else features do this device have?

It has a separate mode ("on" vs "WiFi") that I think is powered by a completely separate microcontroller. It also acts as a Bluetooth speaker and maybe music-light synchronization. The Bluetooth must be a separate circuit, as the "Bluetooth on" sound plays on either WiFi or offline mode. There is a remote, but the manual says it does not work in WiFi mode.

There is an identical model, same model number and manual (almost), that does not have WiFi. I also have one of those that I bought by mistake that I will tear down before returning. It may be the same product without the Tuya board. The manual does not mention the Smart Life app at all.

Is the MCU connected to WB3S via RXD1/TXD1 port of WB3S, like in TuyaMCU product? So it uses UART for control...

What abilities did Tuya application have for this product? What do we have to support?

I haven't used the multimeter yet, and I never used the Tuya app (bought it to flash immediately) but the manual only shows RGBW lighting effects and dimming. The remote has a timer and color effects like transitions.

p.kaczmarek2 wrote:

- red - P9 - (channel 0)
- green - P24 - (channel 1)
- blue - P26 - (channel 2)
- cool - P8 - (channel 3)

With these settings, the toggles in the web GUI work (0 is red on/off, etc.) and they all turn on the laser projector. But "Toggle Light," "LED dimmer," and "LED RGB" do nothing.

It is hard to tell more without direct access to the device.

One of the things you can try is enabling the "show RAW PWM controllers" flag and then testing each slider (each PWM) and noting down what it does. I have no other way to figure out the GPIO roles of your device since I don't have it physically in front of me.

You could also open the device case and sketch the GPIO connections, where each port of BK7231 connects, etc.

Thanks, I'll try that over the next few days. I have a multimeter and logic analyzer available if those would help.

If I can't do more by myself, would it be possible to either send you this device or have one sent to you?

Of course, you can sent me one device as a donation, and I will do my best to research it. We've already done that with Jennifer and other users:
https://www.elektroda.com/rtvforum/topic3892160.html
We are currently accepting devices as donations and featuring them on our YouTube channel:
https://www.youtube.com/@elektrodacom
Most of the devices on that YouTube channel are donated. If you want to see a movie about yours, we can make one. I am making video movies with the help of my assistant, so at least give a like or a sub for her.

Fantastic! I see one device on Amazon.pl that is identical: https://www.amazon.pl/gwia%C5%BAdzistego-ster...%C4%85cy-odtwarzacz-Walentynki/dp/B093BBR43D/

Could you DM me here or email me at specialk(_at_)minidisc.wiki for where to send it? Thanks!

Thanks, I've sent you a DM here. Such a nice device would be an interesting addition to our youtube channel.