Fix #67, see that issue for writeup. gatt needs to be @Volatile

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

@@ -322,7 +322,8 @@ class BluetoothInterface(val service: RadioInterfaceService, val address: String
         val s = safe
         if (s != null) {
             warn("Forcing disconnect and hopefully device will comeback (disabling forced refresh)")
-            hasForcedRefresh = true
+            hasForcedRefresh =
+                true // We've already tossed any old service caches, no need to do it again
             ignoreException {
                 s.closeConnection()
             }

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

@@ -38,6 +38,7 @@ class SafeBluetooth(private val context: Context, private val device: BluetoothD
     var timeoutMsec = 15 * 1000L
 
     /// Users can access the GATT directly as needed
+    @Volatile
     var gatt: BluetoothGatt? = null
 
     @Volatile