Two-dimensional code is also called two-dimensional bar code. The most common form is QR Code. QR is called Quick Response. It is a very popular encoding method on mobile devices in recent years. It can store more than traditional Bar Code. Information can also represent more data types.
Two-dimensional bar code/two-dimensional bar code (2-dimensional bar code) uses a certain geometric figure to record data symbol information in a black and white pattern distributed on a plane (two-dimensional direction) according to a certain law; in the code preparation skillfully Using the concept of "0" and "1" bit stream that constitute the internal logic of the computer, several geometric shapes corresponding to the binary system are used to represent the text value information, and the information is automatically read by image input equipment or photoelectric scanning equipment to realize the information Automatic processing: It has some common features of barcode technology: each code system has its specific character set; each character occupies a certain width; it has a certain check function, etc. At the same time, it also has the function of automatically identifying different lines of information, and processing graphics rotation change points.
Two-dimensional code access control has an open interface, which can integrate peripheral systems, such as office, elevator control, fire protection, and parking lot systems, to achieve unified management and control of multiple systems, improve operational efficiency, and reduce costs.
At the same time, the QR code access control system can be connected to third-party platforms such as official accounts, APPs, small programs, DingTalk, etc., to guide the long-term flow of intelligent integrated management platforms for office buildings and parks, and improve the closed-loop business ecosystem.
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