HIKVISION DS-2CD7A26G0/P-IZHSWG, Operation Manual, Page: 13 / 20

Wiegand Camera
·
Operation Manual
11
4 Transfer Plate Number via Wiegand
Interface
4.1 Overview
The Wiegand interface directly transmits the license plate number, and performs a hash
operation on the license plate number. The last 24 bits are taken through the Wiegand
standard interface, and an even parity bit and an odd parity bit are added before and
after the 24 bits respectively according to the standard 26 bit protocol. The result will be
sent to Wiegand access control (third parties like Paxton or Salto) equipment.
4.2 Advantage
Compatible directly with access control system and platform of Paxton in the UK and
Salto in Europe.
4.3 Applicable Wiegand Protocol
26-bit Wiegand Protocol
4.4 Plate Number Encoding Mode
Figure 4-1 Wiegand Protocol Flow Chart
Here we take plate number 2180870 as example.

The 24 bit encoded by SHA1 mode is 0x54 0x52 0x22

Add parity bit based on 3.1.4 Use Wiegand Protocol to Transfer Card
No.
Plate Number
Add parity
bit
SHA1 Keep last
24bit
Send