HydraFW Wiegand guide

HydraFW Bus Wiegand

This guide is updated towards firmware release HydraFW v0.10 and later

Bus: Wiegand
Connections: two pins (D0/D1) and ground.
Output types: 3.3volt normal output, or open drain
(pull-up/pull-down resistors integrated in MCU or external).
Pull-up resistors: required for open collector output mode (2K – 10K).
Pull-up/down resistors Integrated in MCU: Between 30 to 50K (Typical 40K).
Maximum Voltage: 5.5volts (5volt safe).

Protocol configuration syntax description:

• show Show wiegand parameters or show pins Show pins used in this mode

• pull with parameter up or down or floating to choose internal MCU pull up/down or no pull/external

• exit to exit wiegand mode

Note default value: 
    > wiegand 
    Device: wiegand1
    GPIO resistor: floating
    Pulse timing: 100us
    Pulse gap timing: 20000us

Configuration options:

Hardware Informations:

wiegand1> show pins 
D0: PB8
D1: PB9

Protocol configuration example:

Protocol interaction syntax description:

Bus interaction commands

Protocol interaction example usage wiegand1 write/read:

wiegand1> 0x01 0x02 ~ r 0x00:4
WRITE: 0x01 0x02 0x8B 
READ: 1 
WRITE: 0x00 0x00 0x00 0x00 

Additional informations about wiegand

For more information about the protocol, see https://en.wikipedia.org/wiki/Wiegand_interface