WSAL10500 – Dust Sensor/en

Documentation notice: This technical documentation was independently rewritten from an archived supplier source. Check technical details and commands against the product version and manufacturer documentation before use.

Summary

The Waveshare Dust Sensor uses an onboard GP2Y1010AU0F and provides an analog output that is proportional to dust density. The module supports a wide supply range via an embedded voltage boost circuit.

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WSAL10500 – Dust Sensor

Technical overview

Sensitivity: 0.5 V per 100 µg/m³; measurement range up to 500 µg/m³.
Supply voltage: 2.5 V to 5.5 V; maximum operating current 20 mA.
Operating temperature: −10 °C to 65 °C; storage temperature: −20 °C to 80 °C.
Dimensions: 46 mm × 45.5 mm × 21 mm; mounting hole diameter 2.0 mm; air hole 9.0 mm.
Control principle: set ILED HIGH, wait 0.28 ms, then sample AOUT because the output reaches steady state after 0.28 ms.
Raspberry Pi Pico connection example: VCC to 3.3 V, GND to GND, AOUT to GP26, ILED to GP22.
Arduino UNO connection example: VCC to 5 V, GND to GND, AOUT to A0, ILED to D7.
STM32F103R example: AOUT to GPIOA.6, ILED to GPIOA.7; USART2 serial at 115200 baud, 8 data bits, 1 stop bit, no parity.

Commands and examples – verify before use:

sudo apt-get install p7zip-full
cd ~
sudo wget https://files.waveshare.com/upload/2/2a/Dust-Sensor-code.7z
7z x Dust-Sensor-code.7z -o./Dust-Sensor-code
cd ~/Dust-Sensor-code/Pico/c/build/
export PICO_SDK_PATH=../../pico-sdk
cmake ..
make -j9
cp main.uf2 /media/pi/RPI-RP2/

Notes and version constraints

The shown pin mappings apply to the listed example boards; other boards require modified wiring and code.
The provided Pico MicroPython firmware (v1.15) may cause abnormal runtime behavior with different firmware; the supplied firmware is recommended for testing.
The STM32 examples are based on STM32F103RBT6 and STM32H743; other STM32 boards need custom adaptation.
The Arduino examples target the Arduino UNO; other Arduino boards require changed connections.
The PM2.5 AQI reference table in the source contains obvious typos (“Serious pullution”); exact thresholds should be verified by a specialist before publication.

Source and revision record

Dust Sensor - Waveshare Wiki
Source revision: 110852
Captured: 2026-08-29T10:04:10+00:00
SHA-256: 9e33459b8b48df353b3c01da3bc90f1076845d4c485afc8e2740cb0741d6fb92