The problem is Chromecast requires the phone to have a Chromecast SDK using app on it anyway. Additionally you couldn&#x27;t communicate without having a wifi connection, at least without proxying over the internet which is slow.<p>The closest thing to this would be to have the NFC auto open a webpage that is already paired to the app on the screen so that you can then use the custom web page&#x27;s UI to send control messages to the TV via internet relaying.