I have three d18b20 sensors connected to my ATmega2561 on PE2 pin. I tried modifying an example from dallasTemperature library to print on lcd rather then to serial monitor, and it outputs 0 as the address. Meaning it's not detecting my ds18b20 sensors. I am programing in Arduino. And I changed the pullup resistor from 470 ohm to 4.7k ohm.