The scanner will not read a card

The five things to check, quickest first.

Work down this list. Most of the time it is one of the first two.

1. 1Clean the camera lens. A thumbprint is the single most common cause.
2. 2Move out of direct sun, or out of deep shade. The camera needs even light on the card.
3. 3Hold the card still, about 15–20cm from the phone. Moving it closer does not help.
4. 4Check the card itself — a crease across the QR, or heavy wear, and it cannot be read. Reprint it.
5. 5Try another card you know works. If that one reads, the first card is the problem, not the phone.

If no card reads at all, close GatePass and open it again. If it still does not read, use Find a person to keep the queue moving and tell your admin — do not hold the gate up while you investigate.