Hi @robfarmer,
I’ve been using the smartthings example template smart apps to learn from, and the two lines you have commented out for iconUrl and iconX2Url are the ones that I’ve been using to change the smart app’s icon. I wanted to know all the various possible icons that ST seems to have hosted on amazon so I wrote a quick PERL script to download them. If you want to see those and the PERL script (uses “curl” so make sure that’s installed) you can look here:
This will show all the icons (at least as of 1/24/15) that are visible from https://s3.amazonaws.com/smartapp-icons/
You can look at the .txt file for the URL’s to use, after you look for the icon you want in the stIcons folder.
I’m assuming (haven’t tried it yet) you could point the smart app to any URL you want to host your own custom icons But if you want to use icons in the actual device type, then I think you can only use the ones listed here: