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The product is an air quality sensor that is mainly used to detect the concentration of PM1.0, PM2.5, and PM10 (ranging 0~1000μg/m3) and read values and PWM signals via UART interface and PWM pin. The product has been calibrated at the factory.
The product uses laser scattering to radiate suspending particles in the air, then collects scattering light to obtain the curve of scattering light change with time. There is a MCU built in the product that can calculate particles diameter and the number of particles (concentration).
The values can be outputted via UART interface once every second.
You can also read PWM signals through PWM pin and use the formula to calculate the concentration of PM2.5. Refer to the PWM Output Chapter in the datasheet for more formula details.
| Pin | Pin name | Function |
|---|---|---|
| 1 | VDD | Power supply: 4.8V~5.5V |
| 2 | GND | Ground |
| 3 | SET | Output low: enter power-saving mode
Output high: enter normal mode |
| 4 | RX | UART: RX |
| 5 | TX | UART: TX |
| 6 | NC | Reserved pin |
| 7 | PWM | PWM output |
| 8 | NC | Reserved pin |
| HS Code (reference) | 8504.50.90.00-5 |
|---|
