#include <OneWire.h> 
OneWire  ds(10);  // on pin 10 (a 4.7K resistor is necessary) 

#include "DHT.h" 
#define DHTPIN 2     // what digital pin we're connected to 
#define DHTTYPE DHT11   // DHT 11 
//#define DHTTYPE DHT22   // DHT 22  (AM2302), AM2321 
//#define DHTTYPE DHT21   // DHT 21 (AM2301) 
DHT dht(DHTPIN, DHTTYPE); 

bool running = false; 

void setup(void) { 
  pinMode(13, OUTPUT); 
  digitalWrite(13, HIGH); 
  Serial.begin(9600); 
  Serial.setTimeout(1000); 
  dht.begin(); 
  digitalWrite(13, LOW); 
} 

void loop(void) { 
  byte i; 
  byte present = 0; 
  byte type_s; 
  byte data[12]; 
  byte addr[8]; 
  float celsius, fahrenheit; 
  float h,t; 

  if( !running ){ 
    digitalWrite(13, LOW); 
    Serial.flush(); //flush all previous received and transmitted data 
    while(!Serial.available()){ 
      delay(500); 
    } 
    digitalWrite(13, HIGH); 

    Serial.readString(); 
    Serial.flush(); //flush all previous received and transmitted data 

    running = true; // start execution 
  } 

if ( !ds.search(addr)) { 
    ds.reset_search(); 

    //DHT11 Code 
    h = dht.readHumidity(); 
    t = dht.readTemperature(); 
    if (!isnan(h) && !isnan(t)) { 
      Serial.print("DHT "); 
      Serial.print(t); 
      Serial.print(" "); 
      Serial.println(h); 
    } 
    Serial.println("EOF"); 

    running = false; // done with this cycle, wait again 
    return; 
  } 

  if (OneWire::crc8(addr, 7) != addr[7]) { 
      Serial.println("CRC is not valid!"); 
      return; 
  }
  
  // the first ROM byte indicates which chip 
  switch (addr[0]) { 
    case 0x10: 
//      Serial.println("  Chip = DS18S20");  // or old DS1820 
      type_s = 1; 
      break; 
    case 0x28: 
//      Serial.println("  Chip = DS18B20"); 
      type_s = 0; 
      break; 
    case 0x22: 
//      Serial.println("  Chip = DS1822"); 
      type_s = 0; 
      break; 
    default: 
//      Serial.println("Device is not a DS18x20 family device."); 
      return; 
  }
  
  ds.reset(); 
  ds.select(addr); 
  ds.write(0x44, 1); // start conversion, without parasite power 
 Serial.println(celsius); 
}