diff --git a/app/src/main/java/de/ccc/events/badge/card10/scanner/ScannerFragment.kt b/app/src/main/java/de/ccc/events/badge/card10/scanner/ScannerFragment.kt
index 8721fb046dbefa3d87dcf79ef0318497993e0f41..f3385470d22ad55e4ec84a277340258da7f637bc 100644
--- a/app/src/main/java/de/ccc/events/badge/card10/scanner/ScannerFragment.kt
+++ b/app/src/main/java/de/ccc/events/badge/card10/scanner/ScannerFragment.kt
@@ -48,18 +48,21 @@ class ScannerFragment : Fragment() {
     val callback = object : ScanCallback() {
         override fun onScanResult(callbackType: Int, result: ScanResult) {
             val device = result.device
-            if (device.address.startsWith(CARD10_BLUETOOTH_MAC_PREFIX, true)) {
-                listAdapter.put(
-                    Device(
-                        btMac = device.address,
-                        name = device.name,
-                        paired = device.bondState == BluetoothDevice.BOND_BONDED
-                    )
-                )
-            }
+            if (device.address.startsWith(CARD10_BLUETOOTH_MAC_PREFIX, true))
+                putToListAdapter(device)
         }
     }
 
+    private fun putToListAdapter(device: BluetoothDevice) {
+        listAdapter.put(
+            Device(
+                btMac = device.address,
+                name = device.name,
+                paired = device.bondState == BluetoothDevice.BOND_BONDED
+            )
+        )
+    }
+
     val receiver = object : BroadcastReceiver() {
         override fun onReceive(context: Context, intent: Intent) {
             System.out.println("===== onReceive " + intent)
@@ -71,6 +74,14 @@ class ScannerFragment : Fragment() {
         super.onCreate(savedInstanceState)
         activity?.registerReceiver(receiver, IntentFilter(BluetoothDevice.ACTION_BOND_STATE_CHANGED))
         bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
+        for (device in bluetoothAdapter.bondedDevices.filter {
+            it.address.startsWith(
+                CARD10_BLUETOOTH_MAC_PREFIX,
+                true
+            )
+        }) {
+            putToListAdapter(device)
+        }
         bluetoothAdapter.bluetoothLeScanner.startScan(callback)
     }