Device (with custom DTH) not connecting to Smartthings hub (3rd gen)

[jkp]

1. do not use the graph.api URL. Instead use https://account.smartthings.com
2. for custom code, it is recommended that you install and use the SmartThings Classic app instead of the Samsung Connect app at this point.
3. which dth are you trying to modify to work in the new app? Or which zigbee device?

SPECIFIC differences between "SmartThings Classic" (the V2 app) and “SmartThings (Samsung Connect)” (the V3 app)

this thread is intended only as a listing of specific differences between the two apps, not for complaints, suggestions, discussions of design philosophy, bug reports, questions about migration, joke memes or anything else. Just individual feature differences. We originally used the abbreviation STSC for “SmartThings (Samsung Connect)”, but that never caught on, so now we are calling it the V3 app since it came out with the V3 hub. The V3 app is changing rapidly, so feel free to edit this as needed. The official knowledgebase FAQ is at the following link. Read it. https://support.smartthings.com/hc/en-us/articles/360000114006-New-SmartThings-app-FAQ The “how to” official articles for the V3 app are at the following link: https://support.smartthings.com/hc/en-us/categories/115…