【Arduino】使用LCD1602和DHT11制作温湿度显示器

来源：互联网发布：淘宝网外贸原单店铺编辑：程序博客网时间：2024/05/18 00:21

材料：
1.DHT11
2.LCD1602
3.LCD1602 转接板
4.Arduino UNO
5.Arduino 传感器扩展版

那个Arduino UNO 我当初挑类个便宜的山寨货买，结果发来和正版的长得一样 O(∩_∩)O吓死我了，，，，
这里写图片描述

double Fahrenheit(double celsius) {        return 1.8 * celsius + 32;}    //摄氏温度度转化为华氏温度double Kelvin(double celsius){        return celsius + 273.15;}     //摄氏温度转化为开氏温度// 露点（点在此温度时，空气饱和并产生露珠）// 参考: [url=http://wahiduddin.net/calc/density_algorithms.htm]http://wahiduddin.net/calc/density_algorithms.htm[/url] double dewPoint(double celsius, double humidity){        double A0= 373.15/(273.15 + celsius);        double SUM = -7.90298 * (A0-1);        SUM += 5.02808 * log10(A0);        SUM += -1.3816e-7 * (pow(10, (11.344*(1-1/A0)))-1) ;        SUM += 8.1328e-3 * (pow(10,(-3.49149*(A0-1)))-1) ;        SUM += log10(1013.246);        double VP = pow(10, SUM-3) * humidity;        double T = log(VP/0.61078);   // temp var        return (241.88 * T) / (17.558-T);}// 快速计算露点，速度是5倍dewPoint()// 参考: [url=http://en.wikipedia.org/wiki/Dew_point]http://en.wikipedia.org/wiki/Dew_point[/url]double dewPointFast(double celsius, double humidity){        double a = 17.271;        double b = 237.7;        double temp = (a * celsius) / (b + celsius) + log(humidity/100);        double Td = (b * temp) / (a - temp);        return Td;}#include <dht11.h>#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 displaydht11 DHT11;#define DHT11PIN 2void setup(){  lcd.init();                      // initialize the lcd   lcd.backlight();  lcd.print("Waiting...");  Serial.begin(9600); }void loop(){  int chk = DHT11.read(DHT11PIN);  switch (chk)  {    case DHTLIB_OK:                 lcd.setCursor(0, 0);                lcd.print("Temp:");                lcd.print((float)DHT11.temperature,2);                lcd.write(0xDF);                lcd.print("C");                lcd.setCursor(0, 1);                lcd.print("Humidity:");                lcd.print((float)DHT11.humidity,2);                lcd.print("%");                break;    case DHTLIB_ERROR_CHECKSUM:                 lcd.clear();                lcd.print("Checksum error");                 delay(1000);                  lcd.clear();                break;    case DHTLIB_ERROR_TIMEOUT:                 lcd.clear();                lcd.print("Time out error");                 delay(1000);                             lcd.clear();                break;    default:                 lcd.clear();                lcd.print("Unknown error");                 delay(1000);                                lcd.clear();                break;  }  delay(1000);}

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