Mobile-based access control system with wireless access controller

An access control system, comprising:

• a server;
• a controller for regulating the accessibility of an entrance;
• and
• a mobile device having:
• an application for a user to trigger an access authentication process,
• means for collecting biometric information of the user, and
• a BLUETOOTH module to establish a BLUETOOTH communication link between the mobile device and the controller;
• wherein the controller comprises:
• a communication module for connecting the controller to the server and mobile device for receiving updates on user access credentials;
• an access module for activating/deactivating a barrier of entrance;
• and
• a microprocessor for verifying the received user access credentials, generating an door execution command, and uploading the entrance status to the server;
• wherein, upon the controller receiving a BLUETOOTH signal from the mobile device after a successful biometric verification, the controller then performs a second authentication via the microprocessor to verify the user's accessibility based on the updated user access credentials, and followed by triggering the access module to provide access permission for the user based on the outcomes of the authentications, and further uploads the entrance status to the server.