Take a look at your app and check if you're using the SmartThings Classic app or the newest SmartThings app. SmartThings is in the process of updating their platform and transitioning from Classic to the newer app. While the new app is still a work in progress, you'll be able to control the Power Switch remotely once you have the custom device handler added. However, at the time of writing (March 2019), the handler will not give you access to the Power Switch's advanced settings on the new app. This is because the new app simply doesn't give the option to customize your devices yet.
If you're using Classic, the Power Switch will work with SmartThings out of the box, and you'll just need to add the handler to access the advanced settings.
Once the handler is installed and shows up in your IDE portal, you can include the Power Switch to your network. Here's how:
If you're using the Classic app:
If you're using the newer app:
Once you include the Power Switch and move it to its final location, it never hurts to perform network repair to optimize connectivity. This will help SmartThings find the best communication route to the Power Switch. Here's how to repair the network.
If you're having issues including your Power Switch to SmartThings, we'd recommend excluding the device using the instructions here.
If you have any questions about the process or you're experiencing issues, please reach out to us! We'll be happy to help.