If you can't set up the Apple TV Remote app or the Apple TV Remote in Control Center, * try these steps. After each step, check to see if you can set up the app: Check that your iPhone, iPad, or iPod touch is on the same Wi-Fi network as your Apple TV. read more
How to set up the Remote app Manually. If, for some reason, you don't want to use Home Sharing to connect your Remote app to your Apple TV, you can instead set it up manually. On your iPhone, iPad, or iPod touch, open the Remote app. Tap Add a Device. A four-digit code will appear on the screen. read more
If you don't already have the Apple TV Remote app on your iPhone or iPad, be sure to download it for free in the App Store. You will need your Apple TV, a router, an HDMI cable, your iPhone, and a couple of ethernet cables. Find a regular TV remote. Plug the ethernet cable to the Apple TV. With the iOS Remote App go to Settings -> Geenral -> Remotes, Select Learn Remote and follow the easy steps to teach to Apple TV your TV remote. read more