[BK7231N] APPECK Smart Lights - SM16703P_SetRaw controls only first LED, GPIO 28 needed

Hello everyone,

a quick introduction: My name is Thomas and I originally come from the ESP world.

I recently bought these APPECK Smart Landscape Lights: https://www.amazon.de/dp/B0DMDW5HPT



- They contain a BK7231N (CBU). I flashed the OpenBK7231T_App firmware and I am now trying to control the LEDs.
- The LEDs have VCC, GND and a data line.



Based on the template from this thread https://www.elektroda.com/rtvforum/topic4131618.html, I created the following configuration and

autoexec.bat

:




When I try to control the individual LEDs using the **Command Tool**, it only works for the first LED. The command does not seem to work for the other LEDs. For example:



However, if I use

SM16703P_SetRaw

with the colors of all LEDs - its working

Another strange thing I noticed is that the LEDs only work if I assign the following function to GPIO 28:
"28": "Btn_ScriptOnly;4"
If GPIO 28 is left unassigned, the LEDs do not turn on at all.

So there seem to be three things I don't fully understand:
1. Why do I have to initialize 7 LEDs, even though there are only 6 physical LEDs?
2. Why does

SM16703P_SetPixel

not work but

SM16703P_SetRaw

works?
3. Why does GPIO 28 have to be assigned as Btn_ScriptOnly;4 for the LEDs to work?

Does anyone have an idea why this is happening? In particular, I would like to understand why controlling the individual LEDs with

SM16703P_SetPixel

does not work as expected.

Thanks in advance for any help!
AI: Which exact OpenBK7231T_App firmware version/build are you using, and have you tested the same commands on the latest build?
Built on Aug 2 2026 19:38:07 version 1.18.300
AI: Can you provide clear photos of both sides of the PCB or confirm by tracing whether GPIO 28 is connected to an LED power enable transistor, level shifter, or any part of the LED data/power circuit?
yes