I have a DMX Shield project. It works but only works when I physically touch Arduino pin No. 2 (next to TX) with my finger. This pin is labelled DE2 on the shield. (DE is used to switch between slave and master with a jumper.)
If I simply insert a long (approx 10in) wire into Pin 2/DE2 then it works. If I insert a short wire (5in) into the pin it does not work.
Can anyone suggest what the problem might be please? And, if possible, a more elegant solution than having a loose wire hanging out.
The Conceptinetics CTC-DRA-10-R2. This is the non-isolated version of the shield (for testing)
The Ardiono project library is DMXSimple.
I have the shield set up as a DMX Master (jumper to DE label).