HydraFW Wiegand guide

HydraFW Bus Wiegand

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).
Maximum Voltage: 5.5volts (5volt safe).

This guide is updated towards firmware release HydraFW v0.9 Beta

Protocol configuration syntax description:

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

• device with parameter 1

• 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:

Configuration of twowire1 500KHz:

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

Protocol interaction syntax description:

r or read Read one byte. (r:1…255 for bulk reads)

hd Read one byte. (hd:1…255 for bulk reads). Displays a hexdump of the result (See Hexdump guide)

w or write Followed by values to write byte(s). (w:1…255 for bulk writes)

0 Write this Octal value. Format is prefixed by a 0 (values from 000 to 077)

0b Write this binary value. Format is 0b00000000 for a byte, but partial bytes are also fine: 0b1001.

0x Write this HEX value. Format is 0x01. Partial bytes are fine: 0xA. A-F can be lower-case or capital letters.

0-255 Write this decimal value. Any number not preceded by 0x or 0b is interpreted as a decimal value.

" Write an ASCII-encoded string

Write support optional repeat : (eg.: 10:1…255 for repeated write of same value 10 in this example)

space Value delimiter. Use a space to separate numbers/commands. Any combination is fine, delimiter is required between each number/command, example: [ 0x1 0xff 0 10 0b11 077 ]

& Delay 1uS. (&:1…1000000 for multiple delays)

% Delay 1mS. (%:1…1000000 for multiple delays)

~ Write a random byte. (~:10 repeats the same random byte 10 times)

Protocol interaction example usage twowire1 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