Figure 1.
System structure diagram
TABLE 1.
CHARACTERISTICS OF DUST CONCENTRATION SENSOR
Figure 2.
The structure of the dust concentration sensor
TABLE 2.
DUST SENSOR PIN
Figure 3.
The pin of the DS1820
TABLE 3.
DS1820 STORAGE
TABLE 4.
THE WORKING MODE OF THE SIM900A
Figure 4.
The flow chart of the system
Figure 5.
PM2.5 collection flow chart
Figure 6.
The flow chart of temperature collection
Figure 7.
Data collection and concentration setting diagram
Figure 8.
System alarm and SMS