Design and implementation of a single button operation for a door lock control system based on a near field communication of a smartphone

This design integrates the near field communication (NFC) reader of a smartphone device with the door lock control system to provide a convenient single button operation. This design also offers three operation modes to the user in order to allow a one-time password with a time stamp permission to match the user´s password to thus enhance the door´s security. The door lock control system is fixed on the door, and also provides both the sleep state and the standby state to save power consumption for a long time operation.