Hi Guys,
I have been trying to create my own library from scratch using DHT11 sensor.
It's been weeks, and I am no where close to achieve it.
Could someone provide me the required DHT11.h, DHT11.cpp and the source file along with the keywords?
Any help/inputs would be highly appreciated.
Thank you so much.
@groundFungus, i know about the adafruit library.
But i need to create my own.
<Arduino: 1.6.1 (Windows 7), Board: "Arduino Uno"
DHT.ino:1:17: fatal error: DHT.h: No such file or directory
compilation terminated.
Error compiling.>
(I came across the above error while compiling all the three files.)
(By project.h, I meant dht.h.)
DHT.h
#ifndef DHT_h //prevents problems if someone accidently #include's your library twice
#define DHT_h
#include "Arduino.h" // access to the standard types and constants of the Arduino language
#define Tc
class DHT{
public: //can be accessed by anyone using your library
DHT(int pin); //all the variables and functions needed are defined here
float celsius();
float fahrenheit(celsius); //on the right is a constructor
long saturated_vapor_density();
float actual_vapor_density();
float relative_humidity();
double dewPoint;
private: // can be accessed within the class itself
int _pin;
};
#endif
DHT.cpp
#include "Arduino.h
#include "DHT.h"
{
pinMode(pin, INPUT);
_pin = pin;
}
float celsius
{
cel = (analogRead(_pin500)/1023);
}
float fahrenheit(float celsius)
{
fah = 1.8cel + 32;
return fah;
}
long saturated_vapor_density()
{
s_v_d = 6.335 + 0.6718Tc - 2.0887
10-2(Tc2) + 7.3095(104)(Tc3); //it is Tc to power of 1,2,and 3
//and 10 to power of -2 and 4
}
float actual_vapor_density = 1.156;
float relative_humidity(){
r_h = (actual_vapor_density/s_v_d);
}
double dewPoint(){
d_p = Tc - ((100 - r_h));
}
/Tc is taken to be 25 degree - as this is the ideal temperature. Any value can be taken.
For 25 degree, the value obtained for actual vapor density is 1.156 g/m3.
Humidity is the actual vapor density by the saturated vapor density and is found to be 5% as in the datasheet./
KEYWORDS.txt
DHT KEYWORD1
celsius KEYWORD2
fahrenheit KEYWORD2
saturated_vapor_density KEYWORD2
relative_humidity KEYWORD2
dewPoint KEYWORD2
DHT.ino
#include "DHT.h"
#define DHTPIN 4 //the pin sensor is connected to
#define DHTTYPE DHT11
DHT dht(DHTPIN, DHTTYPE);
void setup()
{
Serial.begin(9600);
}
void loop {
delay(2000); //wait for few seconds before measurements
float fah = dht.fahrenheit();
long s_v_d = dht.saturated_vapor_density();
float r_h = dht.relative_humidity();
double d_p = dht.dewPoint();
Serial.print("Temp in Fahrenheit: ");
Serial.print(fah);
Serial.print("F%t");
Serial.print("Saturated_Vapor_Density: ");
Serial.print(s_v_d);
Serial.println(" gm/m3 ");
Serial.print("Relative Humidity: ");
Serial.print(r_h);
Serial.print(" %\t ");
Serial.print("Dew Point: ");
Serial.print(d_p);
Serial.println(' ');
}
Datasheet
Please do check my code and help me out.
I have been trying for days.
Thank you.
I'm confused- you ask for the .cpp and .h files (which is a library), then when you get a link to one you say that's no help since you need to make your own.
@kenwood120s yes, i need to make them from scratch.
That is the task given to me, i know it sounds absurd, but I still gave it a try.
But no success as of now.