Figure 12 is a chart of the value of data read by
sensor and the value of data read by thermometer.
Figure 12. The chart of data read by thermometer and
sensor
From table 2 can be determined error percetage
from data read by SHT11 sensor using the
equation:
Error percetage =
SHT11 data − Thermometer data
Thermometer data
x 100%
Error percetage of data read by SHT11 sensor
can be seen in table 3. According to table 3, the
error presentation of data read by SHT11 sensor is
1.9 %.
3.2 Testing The Premature Infant Incubator
Alert System via SMS
Testing is done by measure the times needed to
send a message to destination number. In this
testing we use 3 destination hand phone number.
Table 4 is the times needed by three destination
hand phone numbers to receive a warning message.
The measuring is done when the condition of
temperature and relative humidity in the incubator
based on the error condition that has determined by
the system.
Table 3. Error presentation of data read by SHT11 sensor