Wiegand.h -

Remember: Implement it correctly once, and you’ll support every major card reader on the market. Have you battled Wiegand jitter or bit‑order issues? Share your experience below.

// Public API void wiegand_init(const wiegand_config_t *config); void wiegand_set_callback(wiegand_callback_t cb); void wiegand_reset(void); bool wiegand_available(void); uint32_t wiegand_get_facility(void); uint32_t wiegand_get_card(void); int wiegand_get_bit_count(void); wiegand.h

bool validate_26bit(uint32_t raw) uint8_t even_parity = parity_even((raw >> 25) & 0x7F); // Bits 1..13? uint8_t odd_parity = parity_odd((raw >> 1) & 0x3FFF); // Bits 14..25? return (even_parity == ((raw >> 25) & 1)) && (odd_parity == ((raw >> 0) & 1)); Remember: Implement it correctly once, and you’ll support

void IRAM_ATTR on_d1_falling() record_bit(1); Remember: Implement it correctly once

#ifndef WIEGAND_H #define WIEGAND_H #include <stdint.h> #include <stdbool.h>

// Callback type for completed card reads typedef void (*wiegand_callback_t)(uint32_t facility_code, uint32_t card_number, int bits_received);

while (1) vTaskDelay(pdMS_TO_TICKS(1000));