Okay, I'm stumped. I'm having an issue compiling a sketch for
my DHT11 Temp/Humidity senor, would appreciate help.
Here's the compiling error:
/home/user/sketchbook/libraries/DHT11/DHT11.cpp:8:19: fatal error:
DHT11.h: No such file or directory
#include "DHT11.h
^
compilation terminated.
Error compiling
And here's the sketch I'm trying to compile:
/* YourDuino Ethernet Temperature/humidity Web Server
Reads a DHT11 Sensor
Outputs a web page with Temperature and Humidity
terry@yourduino.com
Circuit:
* Ethernet shield attached to pins 10, 11, 12, 13
* DHT11 Sensor connected to Pin 2
Based on code by David A. Mellis & Tom Igoe
*/
/*-----( Import needed libraries )-----*/
#include <SPI.h>
#include <Ethernet.h>
#include <dht11.h>
#include <Wire.h>
/*-----( Declare Constants and Pin Numbers )-----*/
#define DHT11PIN 2 // The Temperature/Humidity sensor
// Enter a MAC address and IP address for your controller below.
// The IP address will be dependent on your local network:
byte mac[] = {
0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
/*-----( Declare objects )-----*/
IPAddress ip(192,168,1,120);
// Initialize the Ethernet server library
// with the IP address and port you want to use
// (port 80 is default for HTTP):
EthernetServer server(80);
dht11 DHT11; //The Sensor Object
/*-----( Declare Variables )-----*/
void setup() /****** SETUP: RUNS ONCE ******/
{
// Open serial communications and wait for port to open:
Serial.begin(9600);
while (!Serial) {
; // wait for serial port to connect. Needed for Leonardo only
}
// start the Ethernet connection and the server:
Ethernet.begin(mac, ip);
server.begin();
Serial.print("server is at ");
Serial.println(Ethernet.localIP());
}//--(end setup )---
void loop() /*----( LOOP: RUNS OVER AND OVER AGAIN )----*/
{
// listen for incoming clients
EthernetClient client = server.available();
if (client) {
Serial.println("new client");
// an http request ends with a blank line
boolean currentLineIsBlank = true;
while (client.connected()) {
if (client.available()) {
char c = client.read();
Serial.write(c);
// if you've gotten to the end of the line (received a newline
// character) and the line is blank, the http request has ended,
// so you can send a reply
if (c == '\n' && currentLineIsBlank) {
// send a standard http response header
client.println("HTTP/1.1 200 OK");
client.println("Content-Type: text/html");
client.println("Connnection: close");
client.println();
client.println("<!DOCTYPE HTML>");
client.println("<html>");
// add a meta refresh tag, so the browser pulls again every 5 seconds:
client.println("<meta http-equiv=\"refresh\" content=\"5\">");
client.print("Hi Mary Alice!");
client.println("
");
/*----(Get sensor reading, calculate and print results )-----------------*/
int chk = DHT11.read(DHT11PIN);
Serial.print("Read sensor: ");
switch (chk)
{
case 0:
Serial.println("OK");
break;
case -1:
Serial.println("Checksum error");
break;
case -2:
Serial.println("Time out error");
break;
default:
Serial.println("Unknown error");
break;
}
client.print("Temperature (C): ");
client.println((float)DHT11.temperature, 1);
client.println("
");
client.print("Temperature (F): ");
client.println(Fahrenheit(DHT11.temperature), 1);
client.println("
");
client.print("Humidity (%): ");
client.println((float)DHT11.humidity, 0);
client.println("
");
client.print("Temperature (K): ");
client.println(Kelvin(DHT11.temperature), 1);
client.println("
");
client.print("Dew Point (C): ");
client.println(dewPoint(DHT11.temperature, DHT11.humidity));
client.println("
");
client.print("Dew PointFast (C): ");
client.println(dewPointFast(DHT11.temperature, DHT11.humidity));
client.println("
");
/*--------( End Sensor Read )--------------------------------*/
client.println("</html>");
break;
}
if (c == '\n') {
// you're starting a new line
currentLineIsBlank = true;
}
else if (c != '\r') {
// you've gotten a character on the current line
currentLineIsBlank = false;
}
}
}
// give the web browser time to receive the data
delay(1);
// close the connection:
client.stop();
Serial.println("client disonnected");
}
} // END Loop
/*-----( Declare User-written Functions )-----*/
//
//Celsius to Fahrenheit conversion
double Fahrenheit(double celsius)
{
return 1.8 * celsius + 32;
}
//Celsius to Kelvin conversion
double Kelvin(double celsius)
{
return celsius + 273.15;
}
// dewPoint function NOAA
// reference: http://wahiduddin.net/calc/density_algorithms.htm
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);
}
// delta max = 0.6544 wrt dewPoint()
// 5x 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/100);
double Td = (b * temp) / (a - temp);
return Td;
}
/* ( THE END ) */
I believe I have the necessary libraries to make this sketch work
such as DHT11, DHTlib and DHT-sensor-library-master.
