Complete frustration with my system

[sainsworth (Scott Ainsworth)]

I’m glad to hear you are having some success. The IDE is the web based programing interface. You can program device handers and apps to add in to ST. You can access the IDE here:
https://account.smartthings.com/login?redirect=https%3A%2F%2Fgraph-na02-useast1.api.smartthings.com%2F

There are instructions for how to add a device handler (DH) to the IDE and publish for use by yourself. JD has some good information here:

[OBSOLETE] FAQ: An Overview of Using Custom Code in SmartThings (SmartThings Classic, Groovy Code)

The original FAQ information in this thread refers to the original smartthings architecture, which was in place through the end of 2022 and a little beyond. Custom code was written in the groovy programming language and ran in the smartthings cloud. As of May 2023, you can no longer add new Groovy DTH‘s or smartapps to your smartthings account. So if you came here because of a link in an old forum thread, or on another site, I’m afraid the Groovy information is no longer usable. All of this was replaced by a new architecture. Cloud to cloud integrations use the smartthings API. Hub connected devices, mostly Zigbee and zwave, now use “Edge Drivers,” written in the LUA programming language. Here’s the official announcement on those: The process for using a custom Edge Driver in the new …

I would expect that you will be able the re-add the GE devices.