title: flutter blue example can't connect to gatt server
body: <p>I am trying to create an application (on flutter/android studio) that can connect to a Ble server and read his characteristics. I used the flutter_blue_example : <a href="https://github.com/pauldemarco/flutter_blue/tree/master/example" rel="nofollow noreferrer">https://github.com/pauldemarco/flutter_blue/tree/master/example</a> . </p>
  
  <p>The scan goes fine, but when I try to connect to the BLE device it does'nt work and I get the following log on android studio : </p>
  
  <pre><code>D/BluetoothGatt( 8205): onClientConnectionState() - status=133 clientIf=8 
  device=00:1A:7D:DA:71:13
  D/FlutterBluePlugin( 8205): onConnectionStateChange: 
  D/BluetoothGatt( 8205): close()
  D/BluetoothGatt( 8205): unregisterApp() - mClientIf=8
  </code></pre>
  
  <p>I used the following example to create my Ble server : <a href="https://github.com/Jumperr-labs/python-gatt-server" rel="nofollow noreferrer">https://github.com/Jumperr-labs/python-gatt-server</a></p>
  
  <p>The problem could come from the server but as it works good with an app like Ble scanner available on the playstore, I think the problem is more likely to come from the app based on flutter. </p>