Figure 1.
Overall system architecture
Figure 2.
Output PWM waveform of DSM501 dust sensor
Figure 3.
Flow chart of PM2.5 particle number measurement
Figure 4.
Flowchart of the ATK-ESP8266 wireless transmission module
Figure 5.
Measurement data of temperature and humidity
TABLE I.
TEMPERATURE AND HUMIDITY MEASUREMENT DATA PROCESSING TABLE
| Time | Temperature(°C) | Humidity(%) | |
|---|---|---|---|
| Sat May | 7 23:01:42 2022 | 24.90 | 45.00 |
| Sat May | 7 23:01:44 2022 | 24.90 | 45.00 |
| Sat May | 7 23:01:46 2022 | 24.90 | 48.00 |
| Sat May | 7 23:01:48 2022 | 24.90 | 48.00 |
| Sat May | 7 23:01:50 2022 | 24.90 | 49.00 |
Figure 6.
Measurement of alcohol concentration
TABLE II.
ALCOHOL CONCENTRATION DATA MEASUREMENT TABLE
| Time | Alcohol concentration(ppm) | |
|---|---|---|
| Sat May | 7 23:01:42 2022 | 9.36 |
| Sat May | 7 23:01:44 2022 | 12.12 |
| Sat May | 7 23:01:46 2022 | 8.29 |
| Sat May | 7 23:01:48 2022 | 7.68 |
| Sat May | 7 23:01:50 2022 | 8.22 |
Figure 7.
Measurement value of PM2.5 particle number
TABLE III.
PM2.5 PARTICLE COUNT MEASUREMENT TABLE
| Time | PM2.5 concentration (per/ liter) |
|---|---|
| Sat May 7 23:01:42 2022 | 7.96 |
| Sat May 7 23:01:44 2022 | 7.25 |
| Sat May 7 23:01:46 2022 | 7.25 |
| Sat May 7 23:01:48 2022 | 7.25 |
| Sat May 7 23:01:50 2022 | 9.84 |
Figure 8.
Wireless transmission interface
Figure 9.
Wireless transmission interface
TABLE IV.
STORAGE FORMAT OF MEASUREMENT INFORMATION
| Time | Temperature(°C) | Humidness(%) | Alcohol (ppm) | PM2.5 (per/liter) |
|---|---|---|---|---|
| Sat May 7 23:01:42 2022 | 24.90 | 45.00 | 9.36 | 7.96 |
| Sat May 7 23:01:44 2022 | 24.90 | 45.00 | 12.12 | 7.25 |
| Sat May 7 23:01:46 2022 | 24.90 | 48.00 | 8.29 | 7.25 |
| Sat May 7 23:01:48 2022 | 24.90 | 48.00 | 7.68 | 7.25 |
| Sat May 7 23:01:50 2022 | 24.90 | 49.00 | 8.22 | 9.84 |