How to debug Device Handlers that worked in Classic but no longer work in the "New" app?

[orangebucket (Graham)]

@marclennox

There appears to be no documentation and/or debugging capability to figure out what’s going on here. If anyone can point me in the right direction to even try and figure out why they aren’t showing properly, it would be much appreciated!

To cut a long story short, here is a post I knocked up yesterday …

Define main tile in new app DH

Here is one of several flags I have knitted on the forum … You may also the following broadly interesting. You may need to scroll back a few posts in a rather long thread to get the context, but I was quite pleased with it. I do recommend going back to post 1 in that thread and reading the intro. The following is something I wrote in a private messages thread: DTHs have always allowed custom attributes and commands to be added, that is to say the attribute and command lines. They were always accessible to any legacy app that bothered to look, webCoRE being particularly effective at working with them. However apps like Smart Lighting and ActionTiles that are based on a limited selection of stock capabilities, couldn’t work with them. In the new environment everything is based…