#include <LiquidCrystal.h>

const float Vref = 1.1; 
const int ADC_resolution = 10; 

LiquidCrystal lcd(12, 11, 10, 9, 8, 7);
  float calculateTemperature(float voltage) {
 
  float temperatureThresholds[] = {0.174, 0.299, 0.424, 0.549, 0.674, 0.799, 0.924, 1.049, 1.20525};
  int temperatureValues[] = {-40,-30,-20,-10,0, 10, 20, 30, 40, 50, 60, 70, 80}; // Adjust these values based on your conversion graph
float temperature;
  int index = 0;
  for (int i = 0; i < sizeof(temperatureThresholds) / sizeof(temperatureThresholds[0]); i++) {
    if (voltage <= temperatureThresholds[i]) {
      index = i;
      break;
    }
  }

  if (index > 0) {
    float interpolationFactor = (voltage - temperatureThresholds[index - 1]) / (temperatureThresholds[index] - temperatureThresholds[index - 1]);
    temperature = temperatureValues[index - 1] + interpolationFactor * (temperatureValues[index] - temperatureValues[index - 1]);
  } 

  return temperature;
}

int adc[] = {100,200, 400, 500, 880, 710};

void setup() { 
Serial.begin(115200); 
lcd.begin(16, 2); 
lcd.clear(); 
} 
void loop() {


  for (int i = 0; i < sizeof(adc) / sizeof(adc[0]); i++) {
    float voltage = adc[i] * Vref / (pow(2, ADC_resolution) -1) ;
 float temperature = calculateTemperature(voltage);
    voltage = adc[i] * Vref / (pow(2, ADC_resolution) -1)*1000;

    lcd.setCursor(0, 0);
    lcd.print("ADC=");
    lcd.print(adc[i]);

    lcd.setCursor(10, 0);
     lcd.print(round(voltage)); 
  lcd.print("mV");

    lcd.setCursor(1, 1);
    lcd.print("Temp=");
     lcd.print(temperature); 
    lcd.print((char)223);
    lcd.print("C");

    delay(2000); 
  }
}