hardware.md

Hardware	Price
Arduino Uno R3 開發版	$139
Arduino 壓克力保護盒	$55
9V 電池盒	$22
杜邦線 20公分，母-公 7條	$10.15
Aosong AM2320	$85
LCD 1602 LCM (已焊 IIC底板)	$94
紙盒	$0
合計：$405.15

temptoLCD.ino

#include "DHT.h"
DHT dht;

#include <Wire.h> 
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27,16,2);  // set the LCD address to 0x27 for a 16 chars and 2 line display

void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  dht.setup(2); // data pin 2
  lcd.init(); 
  lcd.backlight();
}

void loop() {
  // put your main code here, to run repeatedly:
  //delay(dht.getMinimumSamplingPeriod()*10);
  lcd.clear() ;
  lcd.noBacklight();
  delay(3000);
  float humidity = dht.getHumidity();
  float temperature = dht.getTemperature();

  Serial.print(dht.getStatusString());
  Serial.print("\t");
  Serial.print(humidity, 1);
  Serial.print("\t\t");
  Serial.print(temperature, 1);
  Serial.print("\n");
  
  lcd.backlight();
  lcd.print(temperature, DEC );
  lcd.setCursor(1, 1);
  delay(2000);
}