The data-acquisition system is prepared to run several days with 16 analog temperature sensors (LM35DZ) and different sampling rates to test its stability and consistency. The system is subjected to many corruptions and power failures and shows the expected results. Fig. 8 shows an experiment measurement of indoor ambient temperature with the 16 sensors close. The experiment, which runs in 16/3/2013, started at 7 am and ends at 7 pm shows a stable operation. The sampling rate is selected to be 300 s (5 min). The deviation is ±0.5 °C comes with the sensor specifications.