ignore BLE errors while closing

app/src/main/java/com/geeksville/mesh/service/BLEException.kt

@@ -5,4 +5,7 @@ import java.util.*
 
 open class BLEException(msg: String) : IOException(msg)
 
-open class BLECharacteristicNotFoundException(uuid: UUID) : BLEException("Can't get characteristic $uuid")
+open class BLECharacteristicNotFoundException(uuid: UUID) : BLEException("Can't get characteristic $uuid")
+
+/// Our interface is being shut down
+open class BLEConnectionClosing() : BLEException("Connection closing ")

app/src/main/java/com/geeksville/mesh/service/BluetoothInterface.kt

@@ -469,7 +469,12 @@ class BluetoothInterface(val service: RadioInterfaceService, val address: String
             safe =
                 null // We do this first, because if we throw we still want to mark that we no longer have a valid connection
 
-            s?.close()
+            try {
+                s?.close()
+            }
+            catch(_: BLEConnectionClosing) {
+                warn("Ignoring BLE errors while closing")
+            }
         } else {
             debug("Radio was not connected, skipping disable")
         }

app/src/main/java/com/geeksville/mesh/service/SafeBluetooth.kt

@@ -773,7 +773,7 @@ class SafeBluetooth(private val context: Context, private val device: BluetoothD
 
         closeGatt()
 
-        failAllWork(BLEException("Connection closing"))
+        failAllWork(BLEConnectionClosing())
     }
 
     /**