SmartThings synchronous GET webservice call

[nayelyz (SmartThings Developer Support)]

Welcome to the SmartThings Community, @stevepb!
Where are you creating the SmartThings app? physicalgraph.device.HubAction is a function of the legacy platform (IDE)
I suggest you use the SmartApp Node JS SDK instead, which is part of the current Developer Tools. Here’s a tutorial on how to create a simple SmartApp that can help you get started.

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…

Also, you can provide more details about your integration so I can give you other recommendations.