一些 Arduino 程式碼

#include <DHT.h> // 匯入程式庫 DHT sensor library

#include <DHT_U.h>

#define DHTPIN 2 // DHT pin 2 連接 Arduino pin 2

#define DHTTYPE DHT11 // 適用 DHT 11

DHT dht(DHTPIN, DHTTYPE);

void setup() {

  Serial.begin(9600);

  Serial.println(F("DHT11 test!"));

  dht.begin();

}

void loop() {

  delay(2000);                     // 等 2 秒鐘

  float h = dht.readHumidity();    // 讀取濕度值 h

  float t = dht.readTemperature(); // 讀取攝氏溫度值 t

  if (isnan(h) || isnan(t)) {      // 如果讀不到數值，印出讀取失敗訊息

    Serial.println(F("Failed to read from DHT sensor!"));

    return;

  }

  Serial.print("Humidity: "); // 在序列埠螢幕中印出濕度、攝氏溫度

  Serial.print(h);

  Serial.print(" %\t");

  Serial.print("Temperature: ");

  Serial.print(t);

  Serial.print(" *C \n");

}

// the setup function runs once when you press reset or power the board

void setup() {

  // initialize digital pin LED_BUILTIN as an output.

  pinMode(8, OUTPUT);

}

// the loop function runs over and over again forever

void loop() {

  digitalWrite(8, HIGH);   // turn the LED on (HIGH is the voltage level)

  delay(1000);                // wait for a second

  digitalWrite(8, LOW);    // turn the LED off by making the voltage LOW

  delay(1000);

}