OK, I helped myself. When I open the more “section” in the paper ui, I found the submit channel.
I defined two string items and bound them two this channel:
Here Herbert_Testmann describes the following encoding of the values:
xxxxxxxxxx kurz lang
Orangexxxxx 49 50
Rot xxxxxxxx 17 18
Grün xxxxxxx 33 34
Pause 2
If you look at these values in binary format you can see that the RGB led seams to be connected to the 3 lower bits of the upper nibble of the byte. So you can calculate your bit values based on this:
0100 0000 = 64 = blue
0010 0000 = 32 = green
0001 0000 = 16 = red
0000 0010 = 2 = long
0000 0001 = 1 = short
Finally you send a “short” LED blink in yellow/orange if you switch on red and green like this (4 times):