This works but requires you to follow the instructions to the T. The only thing i would add is after creating a Samsung Developer account, make SURE that your Smartthings hub shows under the same developer account before you add the Device Handler code. With Samsung, you could login via a Samsung account or a Smartthings hub. Just make sure you're using the right account. In my case, my hub or devices attached to the hub weren't showing up so once i logged in via the appropriate account, and added the device handler code, everything worked great. Before that, the motion sensor was just being detected as a 'Thing'