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You can use an empty USB port on your TV to power your Chromecast, or you can plug it into the wall.  Check the label on the port you plugged your Chromecast into to quickly find the right input to select. You'll need to be connected to the same wireless network that you want to connect your Chromecast to. Tap the Settings app, tap Wi-Fi, and then tap your home network to connect.          The numbers are unique for each Chromecast.       Once your Chromecast is connected to your wireless network, you can use compatible apps like Netflix and YouTube to begin casting content to your Chromecast. Tap the Cast button at the top of the app and then tap your Chromecast to begin playing video or music on your TV. Make sure your iOS device is connected to your wireless home network. You won't be able to cast if you're still trying to connect to the special network created during Chromecast's setup.
Plug the Chromecast into one of your TV's HDMI ports. Plug the Chromecast's USB cable into your TV or a wall adapter. Turn your TV on. Change inputs on your TV to select the HDMI port for your Chromecast. Connect your iOS device to your home network. Tap the App Store on your iOS device. Tap the Search tab. Type Google Home into the search field. Tap the Get button next to Google Home. Tap the Open button after the app finishes installing. Tap Set Up a New Chromecast. Press the Home button. Tap the Settings app. Tap Wi-Fi. Tap Chromecast####. Double-tap the Home button. Tap the Google Home app. Confirm that the code on the TV matches your app. Type a new name for your Chromecast. Tap your wireless network. Type in your wireless network password. Use compatible apps to begin casting to your Chromecast.