URGENT HELP! measuring humidity and temperature

Projects General Guidance
1

I want to measure humidity and temperature, so I came across this link...

http://www.ajpdsoft.com/modules.php?traducir=es-en&name=News&file=article&sid=572

I connected everything as mentioned, but the problem I am facing is in the script written it gives me a message saying "DHT11_PIN was not declared in this scope"

I need urgent help...

please find the script below

#It defines DHT11_PIN 0 // ADC0

byte read_dht11_dat()
{
byte i = 0;
byte result=0;
for(i=0; i< 8; i++)
{
while(!(PINC & _BV(DHT11_PIN))); // wait for 50us
delayMicroseconds(30);

if(PINC & _BV(DHT11_PIN))
result |=(1<<(7-i));
while((PINC & _BV(DHT11_PIN))); // wait '1' finish
}
return result;
}

void setup()
{
DDRC |= _BV(DHT11_PIN);
PORTC |= _BV(DHT11_PIN);

Serial.begin(9600);
Serial.println("Ready");
}

void loop()
{
Byte dht11_dat[5];
byte dht11_in;
byte i;
// start condition
// 1. pull-down i/Or pin from 18ms
PORTC &= _BV(DHT11_PIN);
delay(18);
PORTC |= _BV(DHT11_PIN);
delayMicroseconds(40);

DDRC &= _BV(DHT11_PIN);
delayMicroseconds(40);

dht11_in = PINC & _BV(DHT11_PIN);

if(dht11_in)
{
Serial.println("dht11 start condition 1 not met");
return;
}
delayMicroseconds(80);

dht11_in = PINC & _BV(DHT11_PIN);

if(!dht11_in)
{
Serial.println("dht11 start condition 2 not met");
return;
}
delayMicroseconds(80);
// now ready for dates reception
for (i=0; i<5; i++)
dht11_dat = read_dht11_dat();

  • DDRC |= _BV(DHT11_PIN);*
  • PORTC |= _BV(DHT11_PIN);*
  • byte dht11_check_sum = dht11_dat[0]+dht11_dat[1]+dht11_dat[2]+dht11_dat[3];*
  • // check check_sum*
  • if(dht11_dat[4]!= dht11_check_sum)*
  • {*
  • Serial.println("DHT11 checksum error");*
  • }*
  • Serial.print("Humidity = ");*
  • Serial.print(dht11_dat[0], DEC);*
  • Serial.print(".");*
  • Serial.print(dht11_dat[1], DEC);*
  • Serial.print("% ");*
  • Serial.print("Temperature = ");*
  • Serial.print(dht11_dat[2], DEC);*
  • Serial.print(".");*
  • Serial.print(dht11_dat[3], DEC);*
  • Serial.println("C ");*
  • delay(2000);*
    }
2

I've never seen a #it directive.
Ever.
(Looks like source passed through Google Translate)
Please use CODE TAGS when posting code.

3

If you really need help I would remove the URGENT HELP! from your title.
It neatly blinded me.

4

Obtener temperatura y humedad con Arduino Proyecto AjpdSoft
For testear the program that have sent to Arduino, will open the window of Serial Monitor of the IDE of Arduino, pressing in the button "Serial Monitor":

It looks to me as if the whole page has been translated - and presumably the code has been mangled in the process. The #define is the only obvious corruption, but given that the page has clearly not been proof read and the published code has never been compiled, I wouldn't trust any of it as far as I could throw it.

5

Hi, Here's some information on using those sensors:
http://arduino-info.wikispaces.com/TemperatureHumidity

And a specific example with working code:
http://arduino-info.wikispaces.com/PROJECT-Temp-Humidity-Display

Let us know how you make out...