nodemcu RFID 門禁卡

電路圖

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程式碼

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	#include <SPI.h>
	#include <MFRC522.h>
	#define SS_PIN D4
	#define RST_PIN D8
	MFRC522 rfid(SS_PIN, RST_PIN); // Instance of the class
	MFRC522::MIFARE_Key key;
	// Init array that will store new NUID
	byte nuidPICC[4];
	byte ansidPICC[4] = {0xE5, 0x0F, 0x23, 0x77};
	void setup() {
	Serial.begin(9600);
	SPI.begin(); // Init SPI bus
	rfid.PCD_Init(); // Init MFRC522
	for (byte i = 0; i < 6; i++) {
	key.keyByte[i] = 0xFF;
	}
	pinMode(D1, OUTPUT);
	pinMode(D2, OUTPUT);
	pinMode(D3, OUTPUT);
	Serial.println(F("This code scan the MIFARE Classsic NUID."));
	Serial.print(F("Using the following key:"));
	printHex(key.keyByte, MFRC522::MF_KEY_SIZE);
	}
	void loop() {
	// Look for new cards
	if ( ! rfid.PICC_IsNewCardPresent())
	return;
	// Verify if the NUID has been readed
	if ( ! rfid.PICC_ReadCardSerial())
	return;
	Serial.print(F("PICC type: "));
	MFRC522::PICC_Type piccType = rfid.PICC_GetType(rfid.uid.sak);
	Serial.println(rfid.PICC_GetTypeName(piccType));
	// Check is the PICC of Classic MIFARE type
	if (piccType != MFRC522::PICC_TYPE_MIFARE_MINI &&
	piccType != MFRC522::PICC_TYPE_MIFARE_1K &&
	piccType != MFRC522::PICC_TYPE_MIFARE_4K) {
	Serial.println(F("Your tag is not of type MIFARE Classic."));
	return;
	}
	if (rfid.uid.uidByte[0] != nuidPICC[0] ||
	rfid.uid.uidByte[1] != nuidPICC[1] ||
	rfid.uid.uidByte[2] != nuidPICC[2] ||
	rfid.uid.uidByte[3] != nuidPICC[3] ) {
	Serial.println(F("A new card has been detected."));
	// Store NUID into nuidPICC array
	for (byte i = 0; i < 4; i++) {
	nuidPICC[i] = rfid.uid.uidByte[i];
	}
	Serial.println(F("The NUID tag is:"));
	Serial.print(F("In hex: "));
	printHex(rfid.uid.uidByte, rfid.uid.size);
	Serial.println();
	Serial.print(F("In dec: "));
	printDec(rfid.uid.uidByte, rfid.uid.size);
	Serial.println();
	}
	else Serial.println(F("Card read previously."));
	// Halt PICC
	rfid.PICC_HaltA();
	// Stop encryption on PCD
	rfid.PCD_StopCrypto1();
	}
	/**
	Helper routine to dump a byte array as hex values to Serial.
	*/
	void printHex(byte *buffer, byte bufferSize) {
	int ans_counter = 0;
	for (byte i = 0; i < bufferSize; i++) {
	Serial.print(buffer[i] < 0x10 ? " 0" : " ");
	Serial.print(buffer[i], HEX);
	if (buffer[i] == ansidPICC[i])
	ans_counter++;
	}
	if ( ans_counter == 4)
	{
	digitalWrite(D1, 1);
	digitalWrite(D3, 1);
	delay(300);
	digitalWrite(D1, 0);
	digitalWrite(D3, 0);
	}
	else if ( ans_counter == 0)
	{
	for (int i = 0; i < 2; i++) {
	digitalWrite(D2, 1);
	digitalWrite(D3, 1);
	delay(50);
	digitalWrite(D2, 0);
	digitalWrite(D3, 0);
	delay(50);
	}
	}
	}
	/**
	Helper routine to dump a byte array as dec values to Serial.
	*/
	void printDec(byte *buffer, byte bufferSize) {
	for (byte i = 0; i < bufferSize; i++) {
	Serial.print(buffer[i] < 0x10 ? " 0" : " ");
	Serial.print(buffer[i], DEC);
	}
	}

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