The PullSDK interfaces are a group of functions, which are used to access the data of the C3 and C4 access control panels. PullSDK enables the developers of final application programs to access the access control panel more visually, conveniently, and concisely. The PullSDK interface provides the following functions: Read and set the controller parameters Read, set, and delete the related information (for example, time segment, user information, and holiday information) of the controller Search for and modify the device information