int tempPin = 15;
int redLedPin = 14;
int greenLedPin = 27;

int sliderPin = 26;

int relayPin = 4;

#include <LiquidCrystal_I2C.h>
#define I2C_ADDR    0x27
#define LCD_COLUMNS 20
#define LCD_LINES   4

LiquidCrystal_I2C lcd(I2C_ADDR, LCD_COLUMNS, LCD_LINES);

const float BETA = 3950; // should match the Beta Coefficient of the thermistor

void drawProgressBar(int progress, int maxProgress) {
  int progressBarWidth = LCD_COLUMNS - 2;  // Leave space for borders
  int filledBarWidth = progressBarWidth * progress / maxProgress;

  lcd.setCursor(0, 2);
  lcd.print("[");
  for (int i = 0; i < progressBarWidth; i++) {
    if (i < filledBarWidth) {
      lcd.print("#");
    } else {
      lcd.print(" ");
    }
  }
  lcd.print("]");
}

void setup() {
  Serial.begin(9600);
  analogReadResolution(10);

  lcd.init();
  lcd.backlight();

  pinMode(tempPin, INPUT);
  pinMode(sliderPin, INPUT);

  pinMode(redLedPin, OUTPUT);
  pinMode(greenLedPin, OUTPUT);

  pinMode(relayPin, OUTPUT);


}
void loop() {

  int analogValue = analogRead(tempPin);
  float celsius = 1 / (log(1 / (1023. / analogValue - 1)) / BETA + 1.0 / 298.15) - 273.15;
  Serial.print("Temperature: ");
  Serial.print(celsius);
  Serial.println(" ℃");

  int sliderValue = analogRead(sliderPin);
  Serial.print("Slider Value: ");
  Serial.println(sliderValue);

  if (celsius >= 35) {
    digitalWrite(redLedPin, HIGH);
    digitalWrite(greenLedPin, LOW);
    digitalWrite(relayPin, HIGH);

  }
  else {
    digitalWrite(redLedPin, LOW);
    digitalWrite(greenLedPin, HIGH);
   digitalWrite(relayPin, LOW);

  }

  lcd.setCursor(0, 0);
  lcd.print("Temperature: ");
  lcd.print(celsius);
  lcd.print(" C");

  sliderValue = analogRead(sliderPin) / 4; // Adjust the division factor based on the range of your slider

  int desiredTemp = map(sliderValue, 0, 255, 0, 80);
  lcd.setCursor(0, 1);
  lcd.print("Desired Temp: ");
  lcd.print(desiredTemp);
  lcd.print(" C");

  drawProgressBar(desiredTemp, 80);


  delay(1000);
  lcd.clear();
}