使用Arduino的基于RFID的考勤系統(tǒng)

描述

你好極客，希望你做得很好。這是我們使用Arduino UNO微控制器板制作的基于 RFID 的智能考勤系統(tǒng)。您也可以在我們的網(wǎng)站上閱讀完整的項(xiàng)目。學(xué)生只需將智能卡放在閱讀器模塊上即可自行注冊(cè)。該系統(tǒng)足以在串行監(jiān)視器屏幕上記錄考勤情況。稍后，您可以從中提取信息。

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基于RFID的考勤系統(tǒng)如何工作？

該系統(tǒng)適用于射頻識(shí)別，即 RFID。我們?cè)谶@里使用的智能卡預(yù)先編碼了學(xué)生的卷號(hào)。每當(dāng)有人使用未在系統(tǒng)內(nèi)存中注冊(cè)信息的卡時(shí)，紅色 LED 將亮起，蜂鳴器開始發(fā)出嗶嗶聲。當(dāng)系統(tǒng)啟動(dòng)時(shí)，它會(huì)要求您將智能卡放在讀卡器模塊上。為了顯示內(nèi)容，我們使用帶有 I2C 模塊的16×2 LCD 。

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當(dāng) RFID 讀取印有學(xué)生正確詳細(xì)信息的卡片時(shí)，綠色 LED 將亮起。

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您可以根據(jù)需要添加任意數(shù)量的學(xué)生，也可以通過修改代碼來更改他們的姓名。

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所需組件

• Arduino UNO
• RC522 射頻識(shí)別模塊
• 不同的RFID標(biāo)簽
• 跳線和面包板
• 紅色和綠色 LED
• 蜂鳴器和 220 歐姆電阻
• I2C模塊
• 16×2液晶顯示器
• 用于上傳代碼的 USB 電纜

基于RFID的考勤系統(tǒng)電路圖

下面給出了使用 I2C 模塊和不使用 I2C 模塊的電路圖。你可以讓任何你想要的人。

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Arduino 5 伏引腳 -> I2c 模塊的 VCC

Arduino GND 引腳 -> I2C 模塊的 GND

Arduino模擬4針-> I2C模塊的SDA

Arduino模擬5針-> I2C模塊的SCL

Arduino digital-2 pin -> 蜂鳴器正極

Arduino digital-4 pin -> 紅色 LED 的正極

Arduino digital-5 pin -> 綠色 LED 的正極

不帶 I2C 模塊

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基于RFID的考勤系統(tǒng)代碼

帶I2C模塊

// Techatronic.com
#include 
#include 
#include 
#include 
// Set the LCD address to 0x27 for a 16 chars and 2 line display
LiquidCrystal_I2C lcd(0x27, 16, 2);
#define SS_PIN 10
#define RST_PIN 9
#define LED_G 5 //define green LED pin
#define LED_R 4 //define red LED pin
#define BUZZER 2 //buzzer pin
MFRC522 mfrc522(SS_PIN, RST_PIN);  // Create MFRC522 instance.
void setup()
{
Serial.begin(9600);  // Initiate a serial communication
SPI.begin();   // Initiate SPI bus
mfrc522.PCD_Init();  // Initiate MFRC522
lcd.begin();
lcd.backlight(); // Turn on the blacklight and print a message.
pinMode(LED_G, OUTPUT);
pinMode(LED_R, OUTPUT);
pinMode(BUZZER, OUTPUT);
noTone(BUZZER);
}
void loop()
{
// Look for new cards
if ( ! mfrc522.PICC_IsNewCardPresent())
{
lcd.setCursor(3,0);
lcd.print("SHOW YOUR");
lcd.setCursor(4,1);
lcd.print("ID CARD");
return;
}
else{
lcd.clear();
}
// Select one of the cards
if ( ! mfrc522.PICC_ReadCardSerial())
{
return;
}
//Show UID on serial monitor
Serial.print("UID tag :");
String content= "";
byte letter;
for (byte i = 0; i < mfrc522.uid.size; i++)
{
Serial.print(mfrc522.uid.uidByte[i] < 0x10 ? " 0" : " ");
Serial.print(mfrc522.uid.uidByte[i], HEX);
content.concat(String(mfrc522.uid.uidByte[i] < 0x10 ? " 0" : " "));
content.concat(String(mfrc522.uid.uidByte[i], HEX));
}
Serial.println();
content.toUpperCase();
if (content.substring(1) == "36 B1 03 32") //change here the UID of the card/cards that you want to give access
{
lcd.print("STUDENT 01");
lcd.setCursor(0,1);
lcd.print("PRESENT");
digitalWrite(LED_G, HIGH);
tone(BUZZER, 500);
delay(300);
noTone(BUZZER);
delay(3000);
digitalWrite(LED_G, LOW);
lcd.clear();
}
else if (content.substring(1) == "81 93 40 43") //change here the UID of the card/cards that you want to give access
{
lcd.print("STUDENT 02");
lcd.setCursor(0,1);
lcd.print("PRESENT");
digitalWrite(LED_G, HIGH);
tone(BUZZER, 500);
delay(300);
noTone(BUZZER);
delay(3000);
digitalWrite(LED_G, LOW);
lcd.clear();
}
else if (content.substring(1) == "91 69 3E 43") //change here the UID of the card/cards that you want to give access
{
lcd.print("STUDENT 03");
lcd.setCursor(0,1);
lcd.print("PRESENT");
digitalWrite(LED_G, HIGH);
tone(BUZZER, 500);
delay(300);
noTone(BUZZER);
delay(3000);
digitalWrite(LED_G, LOW);
lcd.clear();
}
else  {
lcd.print("UNAUTHORIZE");
lcd.setCursor(0,1);
lcd.print("ACCESS");
digitalWrite(LED_R, HIGH);
tone(BUZZER, 300);
delay(2000);
digitalWrite(LED_R, LOW);
noTone(BUZZER);
lcd.clear();
}
}

不帶 I2C 模塊

#include 
#include 
#include "LiquidCrystal.h"
LiquidCrystal lcd(A0, A1, A2, A3, A4, A5);
#define SS_PIN 10
#define RST_PIN 9
#define LED_G 5 //define green LED pin
#define LED_R 4 //define red LED pin
#define BUZZER 2 //buzzer pin
MFRC522 mfrc522(SS_PIN, RST_PIN);  // Create MFRC522 instance.
void setup()
{
Serial.begin(9600);  // Initiate a serial communication
SPI.begin();   // Initiate SPI bus
mfrc522.PCD_Init();  // Initiate MFRC522
lcd.begin(16,2); // Turn on the blacklight and print a message.
pinMode(LED_G, OUTPUT);
pinMode(LED_R, OUTPUT);
pinMode(BUZZER, OUTPUT);
noTone(BUZZER);
}
void loop()
{
// Look for new cards
if ( ! mfrc522.PICC_IsNewCardPresent())
{
lcd.setCursor(3,0);
lcd.print("SHOW YOUR");
lcd.setCursor(4,1);
lcd.print("ID CARD");
return;
}
else{
lcd.clear();
}
// Select one of the cards
if ( ! mfrc522.PICC_ReadCardSerial())
{
return;
}
//Show UID on serial monitor
Serial.print("UID tag :");
String content= "";
byte letter;
for (byte i = 0; i < mfrc522.uid.size; i++)
{
Serial.print(mfrc522.uid.uidByte[i] < 0x10 ? " 0" : " ");
Serial.print(mfrc522.uid.uidByte[i], HEX);
content.concat(String(mfrc522.uid.uidByte[i] < 0x10 ? " 0" : " "));
content.concat(String(mfrc522.uid.uidByte[i], HEX));
}
Serial.println();
content.toUpperCase();
if (content.substring(1) == "36 B1 03 32") //change here the UID of the card/cards that you want to give access
{
lcd.print("STUDENT 01");
lcd.setCursor(0,1);
lcd.print("PRESENT");
digitalWrite(LED_G, HIGH);
tone(BUZZER, 500);
delay(300);
noTone(BUZZER);
delay(3000);
digitalWrite(LED_G, LOW);
lcd.clear();
}
else if (content.substring(1) == "81 93 40 43") //change here the UID of the card/cards that you want to give access
{
lcd.print("STUDENT 02");
lcd.setCursor(0,1);
lcd.print("PRESENT");
digitalWrite(LED_G, HIGH);
tone(BUZZER, 500);
delay(300);
noTone(BUZZER);
delay(3000);
digitalWrite(LED_G, LOW);
lcd.clear();
}
else if (content.substring(1) == "91 69 3E 43") //change here the UID of the card/cards that you want to give access
{
lcd.print("STUDENT 03");
lcd.setCursor(0,1);
lcd.print("PRESENT");
digitalWrite(LED_G, HIGH);
tone(BUZZER, 500);
delay(300);
noTone(BUZZER);
delay(3000);
digitalWrite(LED_G, LOW);
lcd.clear();
}
else  {
lcd.print("UNAUTHORIZE");
lcd.setCursor(0,1);
lcd.print("ACCESS");
digitalWrite(LED_R, HIGH);
tone(BUZZER, 300);
delay(2000);
digitalWrite(LED_R, LOW);
noTone(BUZZER);
lcd.clear();
}
}

我們希望您了解項(xiàng)目的概念，并且必須嘗試自己制作。更多有趣的項(xiàng)目請(qǐng)?jiān)L問我們的官方網(wǎng)站。

學(xué)習(xí)愉快！