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rfid_escape_room.ino
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rfid_escape_room.ino
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/*
* --------------------------------------------------------------------------------------------------------------------
* Example sketch/program showing how to read data from a PICC to serial.
* --------------------------------------------------------------------------------------------------------------------
* This is a MFRC522 library example; for further details and other examples see: https://github.com/miguelbalboa/rfid
*
* Example sketch/program showing how to read data from a PICC (that is: a RFID Tag or Card) using a MFRC522 based RFID
* Reader on the Arduino SPI interface.
*
* When the Arduino and the MFRC522 module are connected (see the pin layout below), load this sketch into Arduino IDE
* then verify/compile and upload it. To see the output: use Tools, Serial Monitor of the IDE (hit Ctrl+Shft+M). When
* you present a PICC (that is: a RFID Tag or Card) at reading distance of the MFRC522 Reader/PCD, the serial output
* will show the ID/UID, type and any data blocks it can read. Note: you may see "Timeout in communication" messages
* when removing the PICC from reading distance too early.
*
* If your reader supports it, this sketch/program will read all the PICCs presented (that is: multiple tag reading).
* So if you stack two or more PICCs on top of each other and present them to the reader, it will first output all
* details of the first and then the next PICC. Note that this may take some time as all data blocks are dumped, so
* keep the PICCs at reading distance until complete.
*
* @license Released into the public domain.
*
* Typical pin layout used:
* -----------------------------------------------------------------------------------------
* MFRC522 Arduino Arduino Arduino Arduino Arduino
* Reader/PCD Uno/101 Mega Nano v3 Leonardo/Micro Pro Micro
* Signal Pin Pin Pin Pin Pin Pin
* -----------------------------------------------------------------------------------------
* RST/Reset RST 5 5 D9 RESET/ICSP-5 RST
* SPI SS SDA(SS) 10 53 D10 10 10
* SPI SS SDA(SS) 9 53 D10 10 10
* SPI SS SDA(SS) 8 53 D10 10 10
* SPI MOSI MOSI 11 / ICSP-4 51 D11 ICSP-4 16
* SPI MISO MISO 12 / ICSP-1 50 D12 ICSP-1 14
* SPI SCK SCK 13 / ICSP-3 52 D13 ICSP-3 15
*
* More pin layouts for other boards can be found here: https://github.com/miguelbalboa/rfid#pin-layout
*/
#include <SPI.h>
#include <MFRC522.h>
#include <Servo.h>
const int numberReaders = 3;
const int ssPins[] = {10, 9, 8};
const int restPin = 5;
const String validIDs[] = {"6324ce12", "a3e999d", "e3f01d11"};
bool readerState[] = {false, false, false};
int servoPosition = 0;
// id at each reader
String idAtReader[numberReaders];
MFRC522 mfrc522[numberReaders];
Servo myservo;
void setup() {
Serial.begin(9600); // Initialize serial communications with the PC
while (!Serial); // Do nothing if no serial port is opened (added for Arduinos based on ATMEGA32U4)
SPI.begin(); // Init SPI bus
delay(4); // Optional delay. Some board do need more time after init to be ready, see Readme
Serial.println(F("Scan PICC to see UID, SAK, type, and data blocks..."));
for (int i = 0; i<numberReaders; i++) {
mfrc522[i].PCD_Init(ssPins[i], restPin);
delay(100);
}
myservo.attach(3);
Serial.println(F("END SETUP"));
}
void loop() {
// boolean isValid = false;
for (int i = 0; i<numberReaders; i++) {
mfrc522[i].PCD_Init();
String currentID = "";
if(mfrc522[i].PICC_IsNewCardPresent() && mfrc522[i].PICC_ReadCardSerial()) {
currentID = getHexUID(mfrc522[i].uid.uidByte, mfrc522[i].uid.size);
// Serial.print(currentID);
// Serial.println();
}
if(currentID != idAtReader[i]) {
idAtReader[i] = currentID;
}
if(idAtReader[i] == validIDs[i]) {
readerState[i] = true;
} else {
readerState[i] = false;
}
mfrc522[i].PICC_HaltA();
mfrc522[i].PCD_StopCrypto1();
}
if(isValidIds()) {
myservo.write(180);
} else {
myservo.write(90);
}
}
String getHexUID(byte * buffer, byte bufferSize) {
String id = "";
for (byte i = 0; i < bufferSize; i++) {
id = id + String(buffer[i], HEX);
}
return id;
}
bool isValidIds() {
return readerState[0] && readerState[1] && readerState[2];
}