Hi, I am new to Bluetooth communication and I am wondering how to connect to a paired device that is found, but getting a connection error. The project being made in Xamarin (Android app).
This is my button code that calls the class:
Button btConnect = FindViewById<Button>(Resource.Id.connect);
btConnect.Click += (sender, e) =>
{
BluetoothManager manager = new BluetoothManager();
//This calls a function that is displayed bellow
if (manager.getAllPairedDevices() == true)
{
//Just to check if it accually found it
btConnect.Text = "found";
}
else
{
btConnect.Text = "Not";
}
};
And then this is my bluetooth class:
BluetoothAdapter btAdapter = BluetoothAdapter.DefaultAdapter;
private static UUID uuid = UUID.FromString("e6f56502-9fb3-4d34-a7b3-a9d9eee043cd");
BluetoothSocket mSocket;
public bool getAllPairedDevices()
{
// Default android phone bluetooth
var devices = btAdapter.BondedDevices;
if (devices != null && devices.Count > 0)
{
// All paired devices
foreach (BluetoothDevice mDevice in devices)
{
openDeviceConnection(mDevice);
}
return true;
}
else
{
return false;
}
}
private void openDeviceConnection(BluetoothDevice btDevice)
{
try
{
mSocket = btDevice.CreateRfcommSocketToServiceRecord(uuid);
mSocket.Connect();
}
catch (IOException ex)
{
mSocket.Close();
//Then this throws Java.IO.IOException: 'read failed, socket might closed ortimeout, read
ret: -1', but if no catch the same error on mSocker.Connect();
throw ex; // <---
}
}
Then the error gets thrown in catch, but if I remove the catch the error is on the connect(). Gives this error Java.IO.IOException: 'read failed, socket might closed or timeout, read ret: -1'. Tried changing the uuid (read somewhere), but that give Java.IO.IOException: Service discovery failed. So how would I fix the connect?