maintain the relative humidity in the incubator. The
SHT11 sensor is used to read the condition of
temperature and humidity in the incubator[7]. The
LCD is used to show command to choose the
desired condition. The switches are used to regulate
input of temperature and relative humidity and to
activate the warning system of incubator. In this
device using 5 switches, 4 switches is used to
choose the condition of temperature and relative
humidity and 1 switch is used to activate the
warning system of incubator. ATmega8535
microcontroller [8] serves as the receiver set point
of the switch and the data from sensor SHT11 for
later comparison. The results of the comparison
data is sent to the GSM modem.The GSM modem
is used to send a warning message when the system
cannot maintain the temperature and relative
humidity in the incubator[9].
According to the function of the incubator
system, it can be divided into several blocks, seen
in figure 5