Gravity: Laser PM2.5 Air Quality Sensor
Laser particle sensor measures particulate concentration for particles from 0.3 to 10 microns and outputs data digitally. Suitable for indoor and outdoor air quality monitoring.
Pinout
- Pin 1Official table 2 row 1
VCC / Positive Power
Type · Power - Pin 2Official table 2 row 2
GND / Negative Power
Type · Ground - Pin 3Official table 2 row 3
SET / Mode setting (More hereof later)
Type · Unknown - Pin 4Official table 2 row 4
RXD / receive serial port pin (3.3V level)
Type · Power - Pin 5Official table 2 row 5
TXD / Transferring serial port pin (3.3V level)
Type · Power - Pin 6Official table 2 row 6
RESET / Reset
Type · GPIO - Pin 78Official table 2 row 7
NC / NUll
Type · Unknown
| Pin | Position | Type | Function |
|---|---|---|---|
| Pin 1 | Official table 2 row 1 | Power | VCC / Positive Power |
| Pin 2 | Official table 2 row 2 | Ground | GND / Negative Power |
| Pin 3 | Official table 2 row 3 | Unknown | SET / Mode setting (More hereof later) |
| Pin 4 | Official table 2 row 4 | Power | RXD / receive serial port pin (3.3V level) |
| Pin 5 | Official table 2 row 5 | Power | TXD / Transferring serial port pin (3.3V level) |
| Pin 6 | Official table 2 row 6 | GPIO | RESET / Reset |
| Pin 78 | Official table 2 row 7 | Unknown | NC / NUll |
Pin details
7 connections- Pin 1Official table 2 row 1
VCC / Positive Power
Power - Pin 2Official table 2 row 2
GND / Negative Power
Ground - Pin 3Official table 2 row 3
SET / Mode setting (More hereof later)
Unknown - Pin 4Official table 2 row 4
RXD / receive serial port pin (3.3V level)
Power - Pin 5Official table 2 row 5
TXD / Transferring serial port pin (3.3V level)
Power - Pin 6Official table 2 row 6
RESET / Reset
GPIO - Pin 78Official table 2 row 7
NC / NUll
Unknown
Start wiring
I2C · Analog · UART · 3.3 – 5 V · Breakout
Waveshare lists MQ-2 for combustible gases and smoke, MQ-3 for alcohol, and MQ-135 for mixed indoor pollutants such as NH3, NOx, alcohol,…
Module pins: Pin 1, Pin 4, Pin 5, Pin 2. Schematik maps them to your board in the app.
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