> Bluetooth?
It's not in or around the standard at all. Android/Google has Fast Pair. I guess Apple get to make their own Fast Pair now.
> Chromecast exists and is quite open, this is not rocket science.
Chromecast is not open at all. Google provide SDKs for specific platforms, but you can't just go make a Chromecast receiver device.
> Bluetooth?
It's not in or around the standard at all. Android/Google has Fast Pair. I guess Apple get to make their own Fast Pair now.
> Chromecast exists and is quite open, this is not rocket science.
Chromecast is not open at all. Google provide SDKs for specific platforms, but you can't just go make a Chromecast receiver device.