QR Master
The Better Way to Manage Visitor Access with QR Code
QR Master is another great addition to TimeTec line of smart products and solutions. It is an access control reader in the form of a mobile App in Android smart devices, where each QR Master is a unique access point that controls the IN and OUT activities of each door. However, the QR Master does not control the door opening/closing action by itself. Instead, it has to be paired with a TimeTec BLE-2 via a Bluetooth connection. The TimeTec BLE-2 is a Bluetooth Low Energy smart door controller that controls the door opening and closing mechanism once it receives command from a QR Master.
The Mechanism of a QR Master with Authentic QR Code

Everytime an admin approves or invites a visitor, the cloud server will generate an authentic QR code to be sent to the visitor immediately. No self-generated QR code is permitted to be used at a QR Master. Whenever the visitor presents this QR code to a QR Master, the information of an access permission based on time zone and access points contained in the QR Code will be relayed to a cloud server for a real-time authentication of an access. If the result returns true, the visitor will be given access via the QR Master, whereby it will send the encrypted unlock door command to the TimeTec BLE-2. For every access activity happening via the QR Master, the cloud server will record the access point, the date and time immediately, and it applies Antipassback rules by default instantaneously. It means that the same QR code must be scanned at the entry point of a QR Master before it can be scanned for exit at the Exit point QR Master. In case the visitor share the same QR code with one other person, that person cannot be using the same QR code to gain access once the visitor have used it. This anti passback rules is preventing unauthorised access by using duplicated QR Codes.
The Affordable Pairing

The combination of a QR Master and a TimeTec BLE-2 is a cost effective option for visitor management access control system as compared to installing a normal access reader where the management has to think about access token to be supplied to visitors at all times. With QR Master and TimeTec BLE-2, visitors can use their own smartphone as an access token, reduce cost and management operation, and add convenience.