DS18B20U shows -37 degrees at room +24

Projects Programming
13

I have also tested @antons15's skecth of Post-1 in my MEGA. The sketch works fine.

emperature: 30.00
Temperature: 30.00
Temperature: 30.00
Temperature: 30.00
Temperature: 30.50
Temperature: 30.50
Temperature: 31.00
Temperature: 31.00
Temperature: 31.00
Temperature: 31.00
Temperature: 31.00