#include <Arduino.h>
#include <math.h>

// Define constants
const float B = 3540;       // Beta value
const float T0 = 25;        // Reference temperature (in Celsius)
const float R0 = 10000;     // Reference resistance (in ohms)

const int adcPin = 34;      // Analog pin connected to thermistor

// Function to calculate temperature from resistance
float calculateTemperature(float R) {
  return 1.0 / (B * log(R / R0)) + 273.15; // Convert temperature to Kelvin
}

void setup() {
  Serial.begin(9600);
  pinMode(adcPin, INPUT); // Set ADC pin as input
}

void loop() {
  // Read ADC value
  int adcValue = analogRead(adcPin);
  
  // Debug: Print raw ADC value
  Serial.print("ADC Value: ");
  Serial.println(adcValue);
  
  // Convert ADC value to voltage
  float voltage = adcValue * (3.3 / 4095.0); // Assuming 3.3V reference voltage and 12-bit ADC
  
  // Debug: Print calculated voltage
  Serial.print("Voltage (V): ");
  Serial.println(voltage, 4); // Print with 4 decimal places
  
  // Calculate resistance using voltage divider formula
  float R = (3.3 * R0) / (voltage) - R0; // Calculate thermistor resistance
  
  // Debug: Print calculated resistance
  Serial.print("Resistance (Ohms): ");
  Serial.println(R);
  
  // Calculate temperature
  float temperature = calculateTemperature(R);
  
  // Print temperature
  Serial.print("Temperature: ");
  Serial.print(temperature);
  Serial.println("°C");

  delay(2000);  // Delay for demonstration purposes
}