Connection to ble bluetooth

MIT App Inventor Help
1

Hello,
good morning,
I have the following uuids in a ble device:

    public static final UUID BATTERY_UUID = UUID.fromString("00002a19-0000-1000-8000-00805f9b34fb");
    public static final UUID FLASH_UUID = UUID.fromString("1c12aaac-f452-11e4-af34-0040f434850d");
    public static final UUID SERVICE_UUID = UUID.fromString("1c12aaa5-f452-11e4-af34-0040f434850d");

and I would like to connect to the device that has them, how should I program it in App inventor?
thanks