Not sure what else, but the thing can tell you if a cable is USB2.0, USB3.0/3.1/… or just for charging.

I could design and produce a small batch of those adaptors.

Would anyone be interested in getting a prototype and helping to test it?

You’re 100% right, I’ve lost ‘i’ somewhere in my debugging process

byte upper_byte = input_bin >> (8+i) ; byte lower_byte = (input_bin >> i) & 0x00FF;

Good idea, I’ve tried usleep after all lines, but no change…

You’re probably right, but that should only change the order of the outputs right?