If you want to have centralized up to 8 locations temperature readings – you should consider building this temperature logger. Design is really simple as it used up to 8 1-wire buss temperature sensors DS1820.
Temperature sensor device is interfaced with LCD panel which is able to display up to 2 temperature values. It also has a separate DS1302 Real Time Clock (RTC) module with over 3 months backup. It also supports Wayne’s NTP format for updating the clock to a Time server. If you need to monitor more than two temperatures then you need to connect device to PC via Serial port. Any terminal software can be used for this. Full project files are available for download here.