#include <OneWire.h>
#include <DallasTemperature.h>

// Data wire is connected to GPIO 4
#define ONE_WIRE_BUS 4

// Setup a oneWire instance to communicate with any OneWire devices
OneWire oneWire(ONE_WIRE_BUS);

// Pass our oneWire reference to Dallas Temperature sensor
DallasTemperature sensors(&oneWire);

void setup() {
  // Start serial communication
  Serial.begin(115200);
  
  // Start the DS18B20 sensor
  sensors.begin();
}

void loop() {
  // Request temperature readings
  sensors.requestTemperatures();

  // Fetch and print temperature in Celsius
  float temperatureC = sensors.getTempCByIndex(0);
  
  // Check if the reading is valid
  if (temperatureC != DEVICE_DISCONNECTED_C)
   {
    Serial.print("Temperature: ");
    Serial.print(temperatureC);
    Serial.println(" °C");
  } else 
  {
    Serial.println("Error: Could not read temperature data");
  }

  // Wait 1 second before the next reading
  delay(1000);
}