Start by troubleshooting these steps:

1. Check that the batteries in your device are fresh and installed correctly.
2. Ensure that the wireless dongle is inserted correctly in the USB port, and the connection is adequate positioned towards the wireless device.
3. Check that the wireless device is compatible with your model of Smart TV.
4. Check the settings on your Smart TV, and make sure they are properly set up to recognize your device.
5. After you’ve checked all the settings, reboot your Smart TV and your wireless device.