WiFi QR Troubleshooting Guide

Last updated: February 18, 2026 — See all guides at /guides/

Use this guide to quickly diagnose and fix WiFi QR scan and connection issues across iPhone and Android devices.

1) Code scans, but device cannot join network

• Confirm SSID is exact (case-sensitive, spaces included).
• Check security mode in QR payload matches router (`WPA2`, `WPA3`, or mixed mode).
• Re-enter password and re-export QR after every credential rotation.

2) Camera does not detect the QR code

• Increase contrast: dark code on light background only.
• Increase quiet zone (minimum 4 modules; use 6 for small prints).
• Avoid glossy lamination, curved surfaces, and strong reflections.

3) Hidden SSID prompts or repeated confirmation

• Some iOS and Android versions prompt manual confirmation for hidden networks.
• If support load is high, use a broadcast guest SSID and rotate password regularly.
• Keep fallback text (SSID + password) near the QR for accessibility.

4) Venue rollout QA sequence

1. Test in real lighting and placement distance.
2. Test with one recent iPhone and one recent Android device.
3. Verify old printed signs are removed after password changes.
4. Log recurring failures by venue location and adjust placement.

5) Fast recovery playbook for staff

• Keep latest QR file in a shared folder with date stamp.
• Keep one backup printed sign at the counter.
• If incident persists, temporarily display fallback SSID/password text.

FAQ

Why does QR scan but fail to connect?

Usually because SSID, security mode, or password in the QR does not match router settings exactly.

How can I reduce failed scans in bright venues?

Use matte materials, larger QR size, stronger contrast, and better placement away from glare.

Should guest WiFi use hidden SSID?

In most cases no. Broadcast guest SSID with regular rotation gives faster onboarding and fewer support tickets.

Back to the generator