I'll show you how with RFID card checker you can open the door.
Needed
Electromechanical Strike
http://www.amig.es/en/strike-body-mod-18-19/g/372
Set permissions on /dev/ttyUSB0 and ttyUSB1
sudo chmod -R 777 /dev/ttyUSB0
sudo chmod -R 777 /dev/ttyUSB1
Code RFIDCardReader.c
open/create file RFIDcardReader.c and post code
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <termios.h>
int main(void) {
struct termios serial;
char rON[3] = {0xFF,0x01,0x01}; // USB Relay ON command
char rOFF[3] = {0xFF,0x01,0x00}; // USB Relay OFF command
char inBuff[16];
char *buffer;
int rfid = open("/dev/ttyUSB0", O_RDWR | O_NOCTTY | O_NDELAY);
int relay = open("/dev/ttyUSB1", O_RDWR | O_NOCTTY | O_NDELAY);
if (rfid == -1) {
return -1;
}
if (relay == -1) {
return -1;
}
//////////////////// Set up Serial Configuration ////////////
serial.c_iflag = 0;
serial.c_oflag = 0;
serial.c_lflag = 0;
serial.c_cflag = 0;
serial.c_cc[VMIN] = 0;
serial.c_cc[VTIME] = 10;
serial.c_cflag = B9600 | CS8 | CREAD;
fcntl(rfid,F_SETFL,0);
fcntl(relay,F_SETFL,0);
tcsetattr(rfid, TCSANOW, &serial); // Apply configuration
tcsetattr(relay, TCSANOW, &serial); // Apply configuration
//////////////////////////////////////////////////////////////
int rcount;
buffer = &inBuff[0];
while(1)
{
buffer = &inBuff[0];
while( (rcount = read(rfid,buffer,1)) > 0)
{
if (rcount < 0) {
perror("Read");
return -1;
}
buffer++;
// Valid Card number is 0x79 0x52 0x33
if (inBuff[0] == 0x79 && inBuff[1] == 0x52 && inBuff[2] == 0x33)
{
printf("%02x %02x %02x \r\n",inBuff[0],inBuff[1],inBuff[2]);
printf("Card is recognized! \r\n");
memset(&inBuff[0],0,3);
write(relay, rON, sizeof(rON));
sleep(5);
write(relay, rOFF, sizeof(rON));
}
else
{
}
}
}
}
How to Compiling C Files? - View here
chmod +x RFIDCardReader
and start file
