So, I have experiment with thermometer based on DS18b20 and experiment with real time clock IC DS1307, and I took decision to combine it in one single device. Other reason why I did it is that I have broken china clock with good enclosure (:
Result looks something like this:
Goal: To get temperature data from DS18b20 sensor
What we have: PIC16f628a, DS18b20, MAX232 level converter, devboard, proteus.
There is example of working with one DS18b20 at line, and you can find some useful functions for work with 1-wire protocol.