(The manufacturer provides the dynamic link library of the access control controller with the functions listed in the catalogue of the following technical articles and the content of the underlying communication protocol for the system integrator for secondary development. Simple programming cases are attached. Multiple cases. This communication protocol is only recommended for use in access control system and attendance system, and is not recommended for other applications. Because the interference source and the use environment of the access control may be different in other occasions, the anti-interference design is not the same. If the access control controller is forcibly used in other environments that we have not checked, it may lead to an increase in the repair rate. ,attention please.)