- Make sure the light on the chime is flashing red, which means the system is not in a pairing mode.
- Try to power off the doorbell and power it up again, then ring the doorbell a few times until you hear the chime ringing. This means the doorbell is linking to the chime internally.
- After Step 1 and Step 2 mentioned above, long-press the SET button on the right side of the chime for 3 seconds until hearing the chime announces "Ready to Scan" again (for the 2nd time).
- If at this time, your doorbell is powered on, you should hear "Ready to scan the QR code" from the doorbell and proceed with the rest of the setup process.
You can also read https://support.wuuklabs.com/hc/en-us/articles/900004288363-The-doorbell-is-not-scanning-the-QR-code-What-should-I-do- for more tips on getting the doorbell to scan the QR code during pairing.