Attiny 85V and DHT 11

Using Arduino Sensors
1

Hi Guys,

I am new to the electronic stuff but not new to the programing. So i always wanted to program something that does something that i can get into my hands. :)...
I done some things and got the hand of it .
I am doing a hobby project, for plant irrigation. I wrote the code for my plants and it works on arduino but i want to scale it down to Attiny.

So i made a simple program that blinks for practice like :

int led = 0; 
void setup{
   pinmode (led, OUTPUT);
}

void loop{
   digitalWrite(0,HIGH);
   delay(300);
   digitalWrite(0,LOW);
   delay(300);
   digitalWrite(0,HIGH);
}

And that works great i connect the led on pin 5 and i work's . Now i won't to add DHT 11 to monitor the temperature and humidity.

int led = 0; 
int val = 0;
void setup{
   pinmode (led, OUTPUT);
}

void loop{
   val = analogRead(2);
    if val > 20){
      digitalWrite(0,HIGH);
      delay(300);
      digitalWrite(0,LOW);
      delay(300);
      digitalWrite(0,HIGH);
    }
}

And it doesn't do nothing . I have tried messing arround whit the pins , and without the analogRead() but i am getting nowhere.

This is located in hardware/attiny45_85/pins_arduino.c
ATMEL ATTINY45 / ARDUINO
//
// +-/-+
// Ain0 (D 5) PB5 1| |8 Vcc
// Ain3 (D 3) PB3 2| |7 PB2 (D 2) Ain1
// Ain2 (D 4) PB4 3| |6 PB1 (D 1) pwm1
// GND 4| |5 PB0 (D 0) pwm0
// +----+

Can someone give me a clue why it doesn't work...

2

Do you have a Arduino board like the Arduino Uno ?
Use that to make the DHT11 work. The DHT11 is not an analog sensor, it has a microcontroller inside and it uses digital communication.
http://playground.arduino.cc/Main/DHT11Lib

If that is working, you can try to make it work on a ATtiny85.

3