#include <stdio.h>
#include <pigpio.h>
#include <string.h>
#include "wiegand.h"

char code[15]; // Code to be processed (could be 4 digits, could be 8)

void callback(int bits, uint32_t value)
{
printf("bits=%d value=%un", bits, value);

// Construct the code
sprintf(code,"%s%u",code, value);

if(strlen(code)>=4){ // 4 digit pin must have been entered or card presented
     printf("nCode %s has been entered of length %d",code,strlen(code));
// Do authenticate stuff here
     if(strcmp(code,"2345")==0){
     // Open the gates
     ...
     }
// Reset code
     memset(code,0,15);

}
}

int main(int argc, char *argv[])
{
Pi_Wieg_t * w;

if (gpioInitialise() < 0) return 1;

w = Pi_Wieg(14, 15, callback, 5);
while(1){
sleep(1);
}
Pi_Wieg_cancel(w);

gpioTerminate();
}