i have tried several things found in various posts here and cannot seem to get my icon to load… The icon is located in config/www/pficon.ico. I have also tried with a png of the same icon.
The latter results in this for pfsense on the final card… This link icon oddly enough is the one that I used on the top of my main lovelace panel. Not sure what i am doing wrong here…
Also, you should only be using picture_entity. icon is for built in icons only. Lastly, the custom integration for fontawesome has the ability to add custom svg icons that are usable in the icon field.
If you want to add many custom icons the last option would be the way forward. If you search on Github for hass icons or home assistant icons you will find many more repositories with custom icons.
So, I got it working with the SimpleIcons integration. I wish I understood more about github and I would try to make my own repo with a custom icon set.