#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include <OneWire.h>
#include <DallasTemperature.h>

// Define the pin for the DS18B20 sensor
#define ONE_WIRE_BUS 2

// OLED display dimensions
#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64
#define OLED_RESET    -1

// Create instances
OneWire oneWire(ONE_WIRE_BUS);
DallasTemperature sensors(&oneWire);
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);

const int analogPin = A0;



void setup() {
  // Start the serial communication
  Serial.begin(9600);

  // Initialize the DS18B20 sensor
  sensors.begin();

  // Initialize the OLED display
  if (!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) {
    Serial.println(F("SSD1306 allocation failed"));
    for (;;); // Halt if display initialization fails
  }
  display.clearDisplay();
  display.setTextSize(1);
  display.setTextColor(SSD1306_WHITE);
  display.setCursor(0, 0);
  display.display();
}

void loop() {
  // Read the analog value from A0 (0 to 1023)
  int analogValue = analogRead(analogPin);

  // Convert the analog value to voltage (0 to 5V)
  float voltage = analogValue * (5.0 / 1023.0);

  // Convert the voltage to temperature (0 to 100°C)
  float temperature = voltage * 20.0; // Scale factor: 5V = 100°C

  // Display the temperature on the OLED
  display.clearDisplay();
  display.setCursor(0, 0);
  display.print("Voltage: ");
  display.print(voltage);
  display.print(" V");

  display.setCursor(0, 20);
  display.print("Temperature: ");
  display.print(temperature);
  display.print(" C");

  // Display the temperature on the serial monitor
  Serial.print("Voltage: ");
  Serial.print(voltage);
  Serial.print(" V, Temperature: ");
  Serial.print(temperature);
  Serial.println(" C");

  // Render the display
  display.display();

  // Wait for a short time before updating
  delay(500);
}