Code: Select all
#include <Wire.h>
#include <Adafruit_NFCShield_I2C.h>
#define MISO (5)
#define DOOR (6)
#define LED (4)
#define IRQ (2)
#define RESET (3) // Not connected by default on the NFC Shield
Adafruit_NFCShield_I2C nfc(IRQ, RESET);
void setup(void) {
Serial.begin(115200);
Serial.println("Hello!");
// pin setup
pinMode(LED, OUTPUT);
pinMode(DOOR, OUTPUT);
digitalWrite(LED, LOW);
digitalWrite(DOOR, LOW);
nfc.begin();
uint32_t versiondata = nfc.getFirmwareVersion();
if (! versiondata) {
Serial.print("Didn't find PN53x board");
while (1); // halt
}
// Got ok data, print it out!
Serial.print("Found chip PN5"); Serial.println((versiondata>>24) & 0xFF, HEX);
Serial.print("Firmware ver. "); Serial.print((versiondata>>16) & 0xFF, DEC);
Serial.print('.'); Serial.println((versiondata>>8) & 0xFF, DEC);
// configure board to read RFID tags
nfc.SAMConfig();
Serial.println("Waiting for Technology Education Card ...");
}
void loop(void) {
uint8_t success;
uint8_t uid[] = { 0, 0, 0, 0, 0, 0, 0 }; // Buffer to store the returned UID
uint8_t uidLength; // Length of the UID (4 or 7 bytes depending on ISO14443A card type)
// Wait for an ISO14443A type cards (Mifare, etc.). When one is found
// 'uid' will be populated with the UID, and uidLength will indicate
// if the uid is 4 bytes (Mifare Classic) or 7 bytes (Mifare Ultralight)
success = nfc.readPassiveTargetID(PN532_MIFARE_ISO14443A, uid, &uidLength);
if(success) {
// out uid
Serial.print("Detected UID:");
for(int i=0; i < uidLength; i++) {
Serial.print(" ");
Serial.print(uid[i]);
}
Serial.println("");
// unlock the door
digitalWrite(DOOR, HIGH);
// blink LED
for(int i=0; i<5; i = i+1) {
digitalWrite(LED, LOW);
delay(100);
digitalWrite(LED, HIGH);
delay(100);
}
// wait another five seconds before re-entering the loop
delay(5000);
// turn led off
digitalWrite(LED, LOW);
// lock door
digitalWrite(DOOR, LOW);
}
}