title: How do you communicate between two unpaired Bluetooth Devices using RFCOMM in UWP?
body: <p>Over the course of a couple of weeks, I have been experimenting with bluetooth communication using RFCOMM between two devices running Windows Universal apps. In the course of my research, I encountered numerous claims (like the one found at the end of this <a href="https://msdn.microsoft.com/en-us/windows/uwp/devices-sensors/bluetooth-dev-faq" rel="nofollow noreferrer">BT Developer FAQ</a>) that communications can indeed be established between two unpaired devices by using the <a href="https://github.com/Microsoft/Windows-universal-samples/tree/dev/Samples/BluetoothRfcommChat" rel="nofollow noreferrer">RFCOMMChat sample</a> in GitHub.  Unfortunately, I have never been able to get even the simplest of tests to work.</p>
  
  <p>Using the RFCOMMChat sample, I tried the following simple test:</p>
  
  <ol>
  <li>Run RFCOMMChat on laptop (Win10 14393.576) as chat server (foreground) and click 'Start Listening'</li>
  <li>Run RFCOMMChat on RPi3 (Win10 Iot Core 14393.576) as chat client.</li>
  <li>On chat client GUI: Click 'Run', Select my laptop (listed), Click 'Connect to Selected Device'</li>
  <li>Upon trying to connect, the laptop is presented with a pairing confirmation request and the app on the RPi3 dies (because it, too, is presented with a pairing confirmation dialog which kills the app). </li>
  </ol>
  
  <p>Based on the claims that I have read, I would not expect to see a pairing request dialog on either device.  </p>
  
  <p>I have asked <a href="https://social.msdn.microsoft.com/Forums/en-US/b017fefc-9335-46a8-bd0a-17fccbdbbc74/how-do-you-communicate-between-two-unpaired-bluetooth-devices-using-rfcomm?forum=WindowsIoT" rel="nofollow noreferrer">this question in the MSDN forums</a> (Windows IoT) as well.  </p>
  
  <p>Has anyone ever successfully established comms between two unpaired devices using UWP apps? </p>