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September 10, 2016 20:24
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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 Mega Nano v3 Leonardo/Micro Pro Micro | |
* Signal Pin Pin Pin Pin Pin Pin | |
* ----------------------------------------------------------------------------------------- | |
* RST/Reset RST 9 5 D9 RESET/ICSP-5 RST | |
* SPI SS SDA(SS) 10 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 | |
*/ | |
#include <SPI.h> | |
#include <MFRC522.h> | |
#define RST_PIN 9 // Configurable, see typical pin layout above | |
#define SS_PIN 10 // Configurable, see typical pin layout above | |
MFRC522 mfrc522(SS_PIN, RST_PIN); // Create MFRC522 instance | |
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 | |
mfrc522.PCD_Init(); // Init MFRC522 | |
mfrc522.PCD_DumpVersionToSerial(); // Show details of PCD - MFRC522 Card Reader details | |
Serial.println(F("Scan PICC to see UID, type, and data blocks...")); | |
pinMode(2, OUTPUT); | |
digitalWrite(2, LOW); | |
} | |
void loop() { | |
// Look for new cards | |
if ( mfrc522.PICC_IsNewCardPresent()) { | |
unsigned long uid = getID(); | |
if(uid != -1){ | |
Serial.print("Card detected, UID: "); Serial.println(uid); | |
if (uid == 51233) { | |
Serial.println("OK"); | |
digitalWrite(2, HIGH); | |
delay(1000); | |
digitalWrite(2, LOW); | |
} else { | |
Serial.println("BAD!!!"); | |
} | |
} | |
} | |
} | |
/** | |
* mfrc522.PICC_IsNewCardPresent() should be checked before | |
* @return the card UID | |
*/ | |
unsigned long getID(){ | |
if ( ! mfrc522.PICC_ReadCardSerial()) { //Since a PICC placed get Serial and continue | |
return -1; | |
} | |
unsigned long hex_num; | |
hex_num = mfrc522.uid.uidByte[0] << 24; | |
hex_num += mfrc522.uid.uidByte[1] << 16; | |
hex_num += mfrc522.uid.uidByte[2] << 8; | |
hex_num += mfrc522.uid.uidByte[3]; | |
mfrc522.PICC_HaltA(); // Stop reading | |
return hex_num; | |
} |
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