Custom App Development for new V3 app?

[GSzabados (Gabor Szabados)]

I guess you meant SmartApps. You can use the old groovy ones from the IDE with the new app as well. You might will see some teething problems meanwhile, or crashes of the new SmartThings app.

Otherwise look here for the new way of SmartApps.

Simple SmartApp Tutorial (SmartApp SDK)

Getting Started with a Simple SmartApp using the new SmartApp SDK This SDK builds on the CoreSDK and provides kick start for SmartApp development. The SmartApp SDK reduces the amount of code necessary to write a SmartApp using the new platform and API. The SmartApp SDK supports both Webhook and AWS Lamda deployment, but this tutorial will focus on the deploying a webhook SmartApp using Glitch. Maybe Try this first: Prerequisites Samsung Account Developer Workspace Account Github or Glitch Account One Contact Sensor One or more Light Devices Guide I suggest having all of the required accounts created before getting started. You will need a location prepared with at least one contact sensor and one or more light devices. Links SDK: GitHub - SmartThingsCommunity/smartapp-sdk-nodejs…