The hardware part works perfectly!
But the software part doesn’t work for me. After hours of experience I tried “ltchiptool”. And now it was easy! I converted four spotlights and the last one only took me five minutes to fully install.
Here the Way
→ Manual Download
→ UF2 package
Download the ltchiptool here:
Start the Program Select your Com and the “UF2” File and klick to start
Don’t forget the bridge CEN to GND after start
And here is my Hardware.
I still had a suitable plug for 3V and GND lying around, so I only needed to operate TX and RX. I managed the bridge connection with a loose cable (or press the Resetbutton on back).
Thanks, for your work!