The wiegand.h header defines the classes and methods necessary to capture these rapid pulses using hardware interrupts. Because the timing of these pulses can be as short as 50 microseconds, using interrupts is more reliable than "polling" (constantly checking the pin state). Key Classes and Methods
while (1) vTaskDelay(pdMS_TO_TICKS(1000)); wiegand.h
Between bits, a fixed gap (typically 500µs to 2ms) exists. After the last bit, a longer inter-character gap (often >10ms) signals the end of transmission. The wiegand
In the world of physical access control and security systems, few protocols are as ubiquitous and enduring as the Wiegand interface. It is the invisible handshake that occurs thousands of times a day in office buildings, gyms, and parking garages. For the embedded systems developer, translating the raw signals from a card reader into usable data often involves a specific, critical file: . After the last bit, a longer inter-character gap
The
#include <stdint.h> #include <stdbool.h>
It abstracts the complexity of reading asynchronous, non-standard pulse trains and converts them into standard data types like integers or strings.