//Name: Albert Madakson
//AE598 PROJECT Simulation with SD Card PROJECT
//Date: 12/07/2022

#include <SD.h>
#include <LiquidCrystal.h>

LiquidCrystal lcd(6, 5, 4, 9, 8, 7);

#define CS_PIN 10
const float BETA = 3950; // should match the Beta Coefficient of the thermistor
File root;


void setup() {
  Serial.begin(115200);
  lcd.begin(16, 2);
  
  
  Serial.print("Initializing SD card... ");
  
  if (!SD.begin(CS_PIN)) {
    Serial.println("Card initialization failed!");
    lcd.print("Card initialization failed!");
    while (true);
  }

  Serial.println("Initialization Done.");
  

   Serial.println("");
   Serial.println("Reading Temperature from Sensor...");

  int analogValue = analogRead(A0);
  float celsius = 1 / (log(1 / (1023. / analogValue - 1)) / BETA + 1.0 / 298.15) - 273.15;
  Serial.print("Temperature: ");
  Serial.print(celsius);
  Serial.println(" ℃");
  //Print on LCD first row
  lcd.print("Temperature: ");
  //Print on LCD second row
  lcd.setCursor(0, 1);
  lcd.print(celsius);
  lcd.print(" deg. C");
  delay(1000);

    // Creating New File in Card and Writing Temperature
  File textFile = SD.open("PROJECT.txt", FILE_WRITE);
  if (textFile){
    textFile.print(celsius);
    textFile.println(" ℃");
    Serial.println("");
    Serial.println("File Creation & Writing Complete");
    textFile.close();
  } else {
    Serial.println("error opening file to write!");
  }


  Serial.println("Files Now Available in the Card:");
  root = SD.open("/");
  printDirectory(root, 0);
  Serial.println("");

  // Reading Data on New File in Card
  textFile = SD.open("PROJECT.txt");

  if (textFile){
    Serial.println("Opening PROJECT.txt... ");
    Serial.print("PROJECT.txt: Temperature Saved in Card is ");
    while (textFile.available()) {
      Serial.write(textFile.read());
      
    }
    
    textFile.close();
  } else {
    Serial.println("error opening file for reading!");
  }
   // initialize digital pin LED_BUILTIN as an output.
  pinMode(LED_BUILTIN, OUTPUT);

  


}


void loop() {
  
}

void printDirectory(File dir, int numTabs) {
  while (true) {

    File entry =  dir.openNextFile();
    if (! entry) {
      // no more files
      break;
    }
    for (uint8_t i = 0; i < numTabs; i++) {
      Serial.print('\t');
    }
    Serial.print(entry.name());
    if (entry.isDirectory()) {
      Serial.println("/");
      printDirectory(entry, numTabs + 1);
    } else {
      // files have sizes, directories do not
      Serial.print("\t\t");
      Serial.println(entry.size(), DEC);
    }
    entry.close();
  }
}