I just tested the latest code (from master) on my jetson nano running ubuntu 18.04. Filter wheels worked fine in simulator mode.

Pre- required libraries did not install right away, had to install them separately using pip. This was ubuntu issue i guess.

One minor thing I noticed was , Once i pressed shoot to take a picture , exposure timer stuck to image exposure time instead of count down.

Everything said I am excited to use this app :-) . I will further test the app in the field in the next few days.