With the SmartThings app, you can test the Raspberry Pi 3 boards developed by you. To test the boards:

1. Launch the SmartThings app.
   Note The SmartThings app (previously known as Samsung Connect application) is preloaded on Samsung devices from Galaxy S8 and Galaxy Note 8 onwards. Additionally, if the phone is based on Android version 6.0 or later, you can download the SmartThings app from the Google Play Store app. The SmartThings app version must be 1.7.02-45 or higher.
2. In Dashboard, tap the settings icon (3 dots at the top right).
3. Tap Settings from the drop-down list. The SMARTTHINGS SETTINGS screen appears.
4. Long press About SmartThings for more than five seconds. The DEVELOPER OPTIONS appears.
5. Toggle Developer mode to turn on the developer mode.
6. Tap Devices.
7. Tap ADD DEVICES.
8. Find the deviceName defined in the JSON file and tap it.

After you have completed the steps, you can control the device.

For more information on testing your device with the SmartThings app, see How to test.