Windows Firewall is blocking phone connections. The hub is running, but the phone will see a blank page until inbound traffic is allowed (one tightly-scoped rule: this Python, TCP port 8754 only). Click the button and confirm the Windows User Account Control dialog.

RhinoCV Hub

Pair a phone

QR code
Waiting for a phone…
Scan with the phone camera. The browser shows a one-time “connection not private” notice (self-signed certificate on your own network) — tap Advanced → Continue, then Start camera. No app needed; iPhone & Android both work.

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