Can I send a message via bluetooth to multiple devices at the same time?

Question

The code I'm using is:

ContentValues values = new ContentValues(); 
String filePath1 = Environment.getExternalStorageDirectory().toString() + "/filename.txt";
values.put(BluetoothShare.URI, Uri.fromFile(newFile(filePath1)).toString()); 
values.put(BluetoothShare.DESTINATION,itDevices.getAddress());
values.put(BluetoothShare.DIRECTION, BluetoothShare.DIRECTION_OUTBOUND); 
Long ts = System.currentTimeMillis(); 
values.put(BluetoothShare.TIMESTAMP, ts); 
Uri contentUri = getContentResolver().insert(BluetoothShare.CONTENT_URI, values);

How can I adapt this to send data to multiple devices at once?

Answer 1

Yes, It is pretty much possible. The official Bluetooth specifications state seven/7 is the maximum number of Bluetooth devices that can be connected at once. And around 248 is the limit for paired devices

However, three to four devices is a practical limit, depending on the types of devices and profiles are used. Some profiles require more Bluetooth data, so they are more demanding than other profiles. Data-intensive profiles may reduce the total number of devices that can be active at the same time. If a Bluetooth device becomes slow to connect or does not perform reliably, reduce the total number of connected devices.

See this answer which can be of your help

Answer 2

You can pair your device(say X) with any number of devices. But if device A is connected with X, device B won't be able to connect at all. You have to disconnect X from A and then connect X with B. Multiple connections at an instant is not allowed.