: Wiegand (W26/W34) and Hikvision’s own RS-485 protocol. Update Procedure via iVMS-4200
I’m currently running on my DS-K2604T units, and stability has been solid with Hik-Connect integration. ds-k2604t firmware
Go to www.hikvision.com → → Download Center . : Wiegand (W26/W34) and Hikvision’s own RS-485 protocol