#include <OneWire.h>
#include <DallasTemperature.h>
//#include <U8glib.h>
//---

//U8GLIB_SSD1306_128X32 u8g(U8G_I2C_OPT_NONE); 
//----


const int SENSOR_PIN = 8; // Arduino pin connected to DS18B20 sensor's DQ pin

int sensor = 2;              // the pin that the sensor is atteched to
int state = LOW;             // by default, no motion detected
int val = 0;   


OneWire oneWire(SENSOR_PIN);         // setup a oneWire instance
DallasTemperature tempSensor(&oneWire); // pass oneWire to DallasTemperature library

float tempCelsius;    // temperature in Celsius
float tempFahrenheit; // temperature in Fahrenheit

void setup()
{
  pinMode(sensor, INPUT); 
  Serial.begin(9600); // initialize serial
  tempSensor.begin();    // initialize the sensor

}

void loop()
{
  tempSensor.requestTemperatures();             // send the command to get temperatures
  tempCelsius = tempSensor.getTempCByIndex(0);  // read temperature in Celsius（获取索引号0的传感器摄氏温度数据）
  tempFahrenheit = tempCelsius * 9 / 5 + 32; // convert Celsius to Fahrenheit

  Serial.print("Temperature: ");
  Serial.print(tempCelsius);    // print the temperature in Celsius
  Serial.print("°C");
  Serial.print("  ~  ");        // separator between Celsius and Fahrenheit
  Serial.print(tempFahrenheit); // print the temperature in Fahrenheit
  Serial.println("°F");

  val = digitalRead(sensor);
  if (state == LOW) {
      Serial.println("Motion detected!"); 
      state = HIGH; 
}else{
        Serial.println("Motion stopped!");
        state = LOW; 
}

/*
u8g.setFont(u8g_font_unifont);
  u8g.setPrintPos(0, 15);
  u8g.print("0.91 OELD");
  u8g.setPrintPos(0,30);
  u8g.print("hello world");
  delay(500);*/

  delay(1000);


}