Leo,
the issue may be with which version of the arduino flat panel the person is using. There are two versions of the arduino code :
This version had an error in the code (accidental or deliberate?) that restricted its use to Sequence Generator Pro. This is the version that runs with Voyager.
Another version is:
This version works with all other software, but will not work with Voyager or SGP.
This page explains things:
The first version worked fine with Voyager last time I checked (can’t check now as I’m in the middle of re doing my observatory and things are not hooked up). If the user still cannot get it working, let me know Leo and I will set mine up temporarily to check so you don’t have to buy anything!!
Hope this helps,
cheers
Gary in Australia