kikitron:
Yes i would like to use 3 pieces of DS18B20 and yesterday I did the project with one DS18B20 from this page with LCD 1602, and it was working
Arduino Digital Temperature Sensor TutorialIs it possible to use this project that I past the link and add "if temp>36 do this" or I have to start all from beginning?
I found the Hacktronics tutorial the best, and I am running three DS18B20s based on it. I just slipped the code below into the loop as a test. You can can have a command to start a pump instead of print to LCD
if ( InTemp > 30.00)
{
 lcd.clear();
 lcd.setCursor(0,0);
 lcd.print("30+");
 lcd.setCursor(0,1);
 lcd.print(InTemp);
 delay(2000);
}