使用Arduino的基于RFID的考勤系统

描述

你好极客，希望你做得很好。这是我们使用Arduino UNO微控制器板制作的基于 RFID 的智能考勤系统。您也可以在我们的网站上阅读完整的项目。学生只需将智能卡放在阅读器模块上即可自行注册。该系统足以在串行监视器屏幕上记录考勤情况。稍后，您可以从中提取信息。

 

 

基于RFID的考勤系统如何工作？

该系统适用于射频识别，即 RFID。我们在这里使用的智能卡预先编码了学生的卷号。每当有人使用未在系统内存中注册信息的卡时，红色 LED 将亮起，蜂鸣器开始发出哔哔声。当系统启动时，它会要求您将智能卡放在读卡器模块上。为了显示内容，我们使用带有 I2C 模块的16×2 LCD 。

 

 

当 RFID 读取印有学生正确详细信息的卡片时，绿色 LED 将亮起。

 

 

您可以根据需要添加任意数量的学生，也可以通过修改代码来更改他们的姓名。

 

 

 

 

 

 

 

 

所需组件

• Arduino UNO
• RC522 射频识别模块
• 不同的RFID标签
• 跳线和面包板
• 红色和绿色 LED
• 蜂鸣器和 220 欧姆电阻
• I2C模块
• 16×2液晶显示器
• 用于上传代码的 USB 电缆

基于RFID的考勤系统电路图

下面给出了使用 I2C 模块和不使用 I2C 模块的电路图。你可以让任何你想要的人。

 

 

Arduino 5 伏引脚 -> I2c 模块的 VCC

Arduino GND 引脚 -> I2C 模块的 GND

Arduino模拟4针-> I2C模块的SDA

Arduino模拟5针-> I2C模块的SCL

Arduino digital-2 pin -> 蜂鸣器正极

Arduino digital-4 pin -> 红色 LED 的正极

Arduino digital-5 pin -> 绿色 LED 的正极

不带 I2C 模块

 

 

基于RFID的考勤系统代码

带I2C模块

// 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();
}
}

不带 I2C 模块

#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();
}
}

我们希望您了解项目的概念，并且必须尝试自己制作。更多有趣的项目请访问我们的官方网站。

学习愉快！