baiyksygg 发表于 2017-10-6 20:45:32

两天终于成了

baiyksygg 发表于 2017-10-6 20:46:57

//
//   FILE:dht11_test1.pde
// PURPOSE: DHT11 library test sketch for Arduino
//

//Celsius to Fahrenheit conversion
double Fahrenheit(double celsius)
{
return 1.8 * celsius + 32;
}

// fast integer version with rounding
//int Celcius2Fahrenheit(int celcius)
//{
//return (celsius * 18 + 5)/10 + 32;
//}


//Celsius to Kelvin conversion
double Kelvin(double celsius)
{
return celsius + 273.15;
}

// dewPoint function NOAA
// reference (1) : http://wahiduddin.net/calc/density_algorithms.htm
// reference (2) : http://www.colorado.edu/geography/weather_station/Geog_site/about.htm
//
double dewPoint(double celsius, double humidity)
{
// (1) Saturation Vapor Pressure = ESGG(T)
double RATIO = 373.15 / (273.15 + celsius);
double RHS = -7.90298 * (RATIO - 1);
RHS += 5.02808 * log10(RATIO);
RHS += -1.3816e-7 * (pow(10, (11.344 * (1 - 1 / RATIO ))) - 1) ;
RHS += 8.1328e-3 * (pow(10, (-3.49149 * (RATIO - 1))) - 1) ;
RHS += log10(1013.246);

// factor -3 is to adjust units - Vapor Pressure SVP * humidity
double VP = pow(10, RHS - 3) * humidity;

// (2) DEWPOINT = F(Vapor Pressure)
double T = log(VP / 0.61078); // temp var
return (241.88 * T) / (17.558 - T);
}

// delta max = 0.6544 wrt dewPoint()
// 6.9 x faster than dewPoint()
// reference: http://en.wikipedia.org/wiki/Dew_point
double dewPointFast(double celsius, double humidity)
{
double a = 17.271;
double b = 237.7;
double temp = (a * celsius) / (b + celsius) + log(humidity * 0.01);
double Td = (b * temp) / (a - temp);
return Td;
}


#include <dht11.h>
#include <LiquidCrystal.h>
dht11 DHT11;
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
#define DHT11PIN 10

void setup()
{
Serial.begin(115200);
Serial.println("DHT11 TEST PROGRAM ");
Serial.print("LIBRARY VERSION: ");
Serial.println(DHT11LIB_VERSION);
Serial.println();
lcd.begin(16, 2);
lcd.print("hello,world!");
}

void loop()
{
Serial.println("\n");

int chk = DHT11.read(DHT11PIN);

Serial.print("Read sensor: ");
switch (chk)
{
    case DHTLIB_OK:
      Serial.println("OK");
      break;
    case DHTLIB_ERROR_CHECKSUM:
      Serial.println("Checksum error");
      break;
    case DHTLIB_ERROR_TIMEOUT:
      Serial.println("Time out error");
      break;
    default:
      Serial.println("Unknown error");
      break;
}
Serial.print("Humidity (%): ");
Serial.println((float)DHT11.humidity, 2);
lcd.setCursor(0, 0);
lcd.print("Humi %:");
lcd.print((float)DHT11.humidity, 2);
Serial.print("Temperature (°C): ");
Serial.println((float)DHT11.temperature, 2);
lcd.setCursor(0, 1);
lcd.print("Temp C:");
lcd.print((float)DHT11.temperature, 2);
Serial.print("Temperature (°F): ");
Serial.println(Fahrenheit(DHT11.temperature), 2);

Serial.print("Temperature (°K): ");
Serial.println(Kelvin(DHT11.temperature), 2);

Serial.print("Dew Point (°C): ");
Serial.println(dewPoint(DHT11.temperature, DHT11.humidity));

Serial.print("Dew PointFast (°C): ");
Serial.println(dewPointFast(DHT11.temperature, DHT11.humidity));

delay(2000);
}
//
// END OF FILE
//

卡库脆香米 发表于 2017-10-7 09:47:46

图中圆圆的那个原件是什么啊？而且你这个1602是怎么连接的啊 ？望指教 ！感谢 感谢

galaxy 发表于 2017-10-7 10:32:38

本帖最后由 galaxy 于 2017-10-7 15:42 编辑

>>>图中圆圆的那个原件是什么啊？

在1602的屏幕上方那個圓圓的...是 VR (可變電阻,電位計)


>>>而且你这个1602是怎么连接的啊 ？

參考這一帖 http://www.geek-workshop.com/thread-78-1-1.html

在二樓的程序中

LiquidCrystal lcd(12, 11, 5, 4, 3, 2);

這就是1602的接線
LiquidCrystal lcd(12, 11, 5, 4, 3, 2); // (RS , Enable , D4 , D5 , D6,D7 )


saybey 发表于 2017-10-9 11:07:08

Serial.println(Kelvin(DHT11.temperature), 2);

把2变成0值后面的。00就没有了 :)

baiyksygg 发表于 2017-10-10 21:24:59

卡库脆香米 发表于 2017-10-7 09:47
图中圆圆的那个原件是什么啊？而且你这个1602是怎么连接的啊 ？望指教 ！感谢 感谢

电位器，调对比度的

卡库脆香米 发表于 2017-10-13 18:56:52

感谢楼主 ！！！！:loveliness:
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