DHT11

或
將以下兩個檔案解壓縮至libraries
DHT.zip
Adafruit_Sensor.zip

#include "DHT.h"
#define dhtPin 8      //讀取DHT11 Data (GPIO2接至D8)
#define dhtType DHT11 //選用DHT11

DHT dht(dhtPin, dhtType); // Initialize DHT sensor

void setup() {
Serial.begin(115200);
dht.begin();//啟動DHT
delay(2000);
}

void loop() {
float h = dht.readHumidity();//讀取濕度
delay(2000);
float t = dht.readTemperature();//讀取攝氏溫度
delay(2000);
float f = dht.readTemperature(true);//讀取華氏溫度
delay(2000);
if (isnan(h) || isnan(t) || isnan(f)) {
    Serial.println("無法從DHT傳感器讀取！");
    return;
}
Serial.print("濕度: ");
Serial.print(h);
Serial.print("%");
Serial.print("    攝氏溫度: ");
Serial.print(t);
Serial.print("*C");
Serial.print("    華氏溫度: ");
Serial.print(f);
Serial.println("*F");
delay(2000);
}

I2C LCD

#include <LiquidCrystal_I2C.h>
#include "DHT.h"
#define dhtPin 8      //讀取DHT11 Data (GPIO2接至D8)
#define dhtType DHT11 //選用DHT11

DHT dht(dhtPin, dhtType); // Initialize DHT sensor
LiquidCrystal_I2C lcd(0x3F,16,2);
void setup() {
Serial.begin(115200);
lcd.init();
lcd.backlight();
dht.begin();//啟動DHT
}

void loop() {

float h = dht.readHumidity();//讀取濕度
delay(2000);
float t = dht.readTemperature();//讀取攝氏溫度
delay(2000);
if (isnan(h) || isnan(t)) {
    return;
}
   lcd.setCursor(0,0);
   lcd.print("h: ");
   lcd.print(h);
   lcd.setCursor(0,1);
   lcd.print("t: ");
   lcd.print(t);
   delay(2000);//延時5秒
}