A card is a basic unit, which can link with a face picture and multiple fingerprints, for access control in this manual. So, before starting any other operations, you should add cards and apply the card information (e.g., card number, card type, group, permissions, and so on) to access control devices.
Make sure you have called NET_DVR_Init to initialize the development resources.
Make sure you have called NET_DVR_Login_V40 to log in to device.
Figure 1 Programming Flow of
Managing Card InformationCall NET_DVR_Logout and NET_DVR_Cleanup to log out and release the resource.