Blue not displaying


I have a P4-256*128-2121-A5 (64x32 LEDs) panel with an Electrodragon driver board on a Raspberry Pi3. I can run the demo scripts and it’s nearly working.

However, I am not getting any blue pixels. The options I am using are:
sudo ./demo -D3 runtext.ppm --led-rows=32 --led-cols=64 --led-slowdown-gpio=5 --led-no-hardware-pulse

Any ideas for what else needs tweaking?



I have answered my own question. It also needs the option --led-multiplexing=0

All works fine now.