有把DHT.h都下載下來並放到library 裡面了，代碼也是參考網上資源的，

有導通〈但不持續，綠色LED是只閃一下〉，甚至有信號回傳〈黃色LED也是同綠色LED閃一下〉，信號收到卻都是NAN

以下是代碼

#include "DHT.h"           // Include the DHT library 
#define DHTPIN 13        // Where you have connected you DHT Sensor
#define DHTTYPE DHT11    // Defines the type of the sensor
DHT dht(DHTPIN, DHTTYPE);

//LiquidCrystal lcd(12, 11, 5, 4, 3, 2);  // LCD connection
void setup() {
  Serial.begin(115200);             // Begins serial communication
  Serial.println("Temperature");  // prints the message Temperature on the serial monitor
  dht.begin();                    // Begins the communications with the temperature sensor
}

void loop() {
  float h = dht.readHumidity();         // reads the humidy and stores on the float variable named h
  float t = dht.readTemperature();      // reads the temperature and stores on the float variable named t

  Serial.print("Humidity: ");           // prints the message Humidity: on the serial monitor
  Serial.print(h);                      // prints the humidity value on the serial monitor
  Serial.print(" %\t");
  Serial.println();                     // goes to the next line on the serial monitor

  Serial.print("Temperature: ");        // prints the message Temperature: on the serial monitor 
  Serial.print(t);                      // prints the temperature value on the serial monitor
  Serial.print(" *C ");
  Serial.println();                     // goes to the next line on the serial monitor

  if (isnan(h) || isnan(t)) {                    //This if statement check to see if the DHT sensor is connected or disconnected
    Serial.println("Sensor is not connected");   //prints the message sensor is not connected on the serial monitor  
  }

  delay(2000);                                  // wait for two seconds
}