Fingerprint Attendance Project

 Final Project - Fingerprint Attendance 
 RTC on SCL/SDA Lines
 SD Card on SPI Interface
 LCD Screen Nominal Pinout - except chip select(en) is 10 for SPI Interface
 Fingerprint on DI 2 and 3
 
  
 */

#include <Adafruit_Fingerprint.h>
#include <SoftwareSerial.h>
#include <LiquidCrystal.h>
#include <DS3231_Simple.h>

#include <SPI.h>
#include <SD.h>

//Declare a file object for the SD card 

File myFile;



DS3231_Simple Clock;
SoftwareSerial mySerial(2, 3);
Adafruit_Fingerprint finger = Adafruit_Fingerprint(&mySerial);


const int rs = 9, en = 10, d4 = 8, d5 = 5, d6 = 6, d7 = 7;
LiquidCrystal lcd(rs, en, d4, d5, d6, d7);

//Int values for the RTC module 

 int hr ;
 int mn ;
 int sc ;
 int yr ;
 int mnt ;
 int dy ;
 byte rtcTemp;


//Standard issued finger print function 

int getFingerprintIDez();  // Function declaraton. This calls the get.finger object from the Adafruit library 

int fingerPrintID ;   // Set this to 0 for a place holder
boolean mainUser;  // This is a true / false for showing the main user 

String userID = " ";
int confidence;


void dispDateAndTime()
{
  DateTime MyDateAndTime;
  
  lcd.clear();
  MyDateAndTime = Clock.read();

 hr = MyDateAndTime.Hour;
 mn = MyDateAndTime.Minute;
 sc = MyDateAndTime.Second;
 yr = MyDateAndTime.Year;
 mnt = MyDateAndTime.Month;
 dy = MyDateAndTime.Day;
 rtcTemp = Clock.getTemperature();

    
    lcd.setCursor(0,0);
    lcd.print("TIME - HH:MM:SS");
    lcd.setCursor(0,1);
    lcd.print("DATE - DDMMYY");
    delay(1000);
    lcd.clear();

    lcd.setCursor(0,0);
    if (hr < 10) lcd.print("0");
    lcd.print(hr);
    lcd.setCursor(2,0);
    lcd.print(":");
    lcd.setCursor(3,0);
    if (mn < 10) lcd.print("0");
    lcd.print(mn);
    lcd.setCursor(5,0);
    lcd.print(":");
    lcd.setCursor(6,0);
    if (sc < 10) lcd.print("0");
    lcd.print(sc);
    
    lcd.setCursor(0,1);
    if (dy < 10) lcd.print("0");
    lcd.print(dy);
    lcd.setCursor(2,1);
    lcd.print("/");
    lcd.setCursor(3,1);
    if (mnt < 10) lcd.print("0");
    lcd.print(mnt);
    lcd.setCursor(5,1);
    lcd.print("/");
    lcd.setCursor(6,1);
    lcd.print(yr);
    delay(2000);
    lcd.clear();
    lcd.setCursor(0,0);
    lcd.print("CURRENT TEMP");
    lcd.setCursor(0,1);
    lcd.print(rtcTemp);
    lcd.setCursor(5,1);
    lcd.print("C*");
    delay(2000);
    lcd.clear();
   
}

void fetchDate()
{
  DateTime MyDateAndTime;
  
  
  MyDateAndTime = Clock.read();

 hr = MyDateAndTime.Hour;
  mn = MyDateAndTime.Minute;
  sc = MyDateAndTime.Second;
 yr = MyDateAndTime.Year;
 mnt = MyDateAndTime.Month;
dy = MyDateAndTime.Day;
rtcTemp = Clock.getTemperature();

}


void setup()  
{


Serial.begin(9600);
 Clock.begin();
 finger.begin(57600);

 lcd.begin(16, 2);

 lcd.setCursor(0,1);
 lcd.clear();



 dispDateAndTime();
 delay(2000); 
 lcd.clear();
 lcd.print("Init SD card...");
 delay(500);
  if (!SD.begin(4)) {
    lcd.clear();
    lcd.print("SD Init failed!");
    delay(1000);
    return;
  }
  lcd.clear();
  lcd.print("SD Ready.");
  delay(1000);
  

  lcd.clear();


// Declare a file and write a header 
  myFile = SD.open("attend.csv", FILE_WRITE | O_APPEND);
 if (myFile)
    {
    myFile.println("TLI-31300 Attendance Project"); 
    myFile.println("Student,Time,Date,Temp,Confidence");   
    myFile.close();
    }
    else
    {
    Serial.println("Couldn't open log file");
    return;
    }  
  
  

}


void loop() 
  
{   

    fingerPrintID = getFingerprintIDez();
  delay(50);

  if (!mainUser )  //Waiting for a valid user 
  {
    lcd.setCursor(0, 0);
    lcd.print("Waiting on");
    lcd.setCursor(0, 1);
    lcd.print("A Valid Finger");
    delay(500);

  }

  if (mainUser)  // found a valid user 
  {
    lcd.clear();
    fetchDate();
    delay(150);

    /*Several if statements on the finger.fingerID to assign an actual name.  To Save space this may be removed, and a .txt file could be created on the SD card with the information.  Then a matching
     Algoritihim to sort through the interger values and assign an actual name .  For now this was easier 
    */
    if (finger.fingerID == 1) {
      userID = "Casey 1";
    }

    if (finger.fingerID == 4) {
      userID = "Casey 4";
    }
  
  myFile.close();  // This proves to be critical. If the file is already open for whatever reason, you couldn't write to it again. 
  myFile = SD.open("attend.csv", FILE_WRITE | O_APPEND);

 if (myFile) {
  Serial.println("Writing to SD Card"); 
  myFile.println("");
  myFile.print(String(userID));
  myFile.print(",");
  myFile.print(String(hr)+":"+(mn)+":"+(sc));
  myFile.print(",");
  myFile.print(String(yr)+"/"+(mnt)+"/"+(dy));
   myFile.print(",");
  myFile.print(String(rtcTemp));
  myFile.print(",");
  myFile.print(String(confidence));

myFile.close();
delay(1000);
lcd.setCursor(0, 0);
    lcd.print("Recorded");
    lcd.setCursor(0, 1);
    lcd.print(userID);
    delay(1000);

 }
 else
 {
  Serial.println("Issue Opening SD Card");
 }
lcd.clear();
} 

}// end of main 

int getFingerprintIDez() {
  uint8_t p = finger.getImage();
  if (p != FINGERPRINT_OK) return mainUser = false;
  //
  p = finger.image2Tz();
  if (p != FINGERPRINT_OK)  return mainUser = false;


  // OK converted!

  p = finger.fingerFastSearch();
  if (p != FINGERPRINT_OK) return mainUser = false;

  // found a match!  Serial.print("Found ID #"); Serial.print(finger.fingerID);
  Serial.print(" with confidence of "); Serial.println(finger.confidence); Serial.println(finger.fingerID);


  confidence = finger.confidence;
  mainUser = true;
   
  return finger.fingerID;

}