Is there any Android TV that could act as a Bluetooth center? I'd like to develop an app for Android TV that can control BLuetooth devices.

Is there any Android TV that could do that ?

Alternatively, could a TV box such as the Xiaomi Mi TV do that ?
http://www.mi.com/en/mibox/
The official Google Android TV support page has instructions for connecting devices via Bluetooth. This page (written in January 2018) specifies these steps for connecting Bluetooth speakers:


Find and select Settings from the app menu
Select 'Bluetooth' (may be under Wireless and Networks or Remote &amp; accessories)
Use the Pair button on your speaker (or other device) to start the pairing process
Follow the dialog on the screen to complete pairing.


According to this answer on Stack Overflow, you should be able to connect up to 7 devices as long as they are above Bluetooth 4.0. The MiBox you linked to does have Bluetooth 4.0/3.0.

All this considered, yes, controlling Bluetooth devices via an Android TV is possible.

However, in relation developing an app to control Bluetooth devices, there are several in the Play Store now, but development questions are best handled on StackOvervlow.