Learning Bluetooth

Steps to setup Bluetooth

1. Add Permissions in AndroidManifest.xml.
2. Enable Bluetooth using BluetoothAdapter.
3. Check if Bluetooth is supported.
4. Find Bluetooth devices using BluetoothDevice & BroadcastReceiver.
5. Pair Bluetooth devices using BluetoothDevice.
6. Establish connection with Bluetooth devices using BluetoothSocket.
7. Transfer Bluetooth data using BluetoothSocket.
8. Close connection using BluetoothSocket.

Note to clarify here between points 5 and 6, as they are closely related. There is a difference between being paired and being connected:

• To be paired means that two devices are aware of each other's existence, have a shared link-key that can be used for authentication, and are capable of establishing an encrypted connection with each other.
• To be connected means that the devices currently share an RFCOMM channel and are able to transmit data with each other. The current Bluetooth APIs require devices to be paired before an RFCOMM connection can be established. Pairing is automatically performed when you initiate an encrypted connection with the Bluetooth APIs.

Other Specifications

• Koin for dependency injection

Documentation

Developer Android Setup Bluetooth

Github Bluetooth Chat