What is the problem that nfc mobile phone cards cannot be simulated?

1. Maybe the card is not aligned with the sensing area of the mobile phone, so the mobile card finds the sensing area again and tries to read the card;

2. It is suggested that you cross-check whether there is a problem with a specific door card or a specific access control machine, and try to simulate other door cards to brush the same access control, or try to brush access control machines in different locations in the same area with the same door card; Because some door cards and access controls are not designed according to NFC standards, there may be cases where the simulation is successful but the card cannot be swiped.

3. If the card is not on the frequency of 13.56MHz, the mobile phone can't sense it. The access card simulation can only simulate the unencrypted access card with the frequency band of 13.56MHz. If the mobile phone does not respond during the card reading process, it means that the card is not 13.56MHz, and the mobile phone cannot perform induction recognition, so there is no prompt or it cannot be used normally.

4. After updating to the latest stable version and development version of the system, the door card simulation can support the function of "custom blank card"; If your community and property can provide card writing service, and the technology used by the community access card meets the requirements of access card simulation function (unencrypted access card, frequency band is13.56 MHz); It is suggested that you use this function to open a white card, and then use it after writing information to the property management department.