The BME25K322A is a laser-based dust detection module developed by Best Modules.
It consists of an adapter board, connection cable, and the BM25S3221-1 laser particle sensor.
Using the Mie scattering principle, the module detects airborne particulate matter and outputs the concentrations of PM1.0, PM2.5, and PM10.
It is factory-calibrated and requires no additional driving circuitry.
With the included adapter board, the sensor's 8-pin interface is converted into a 5-pin BMCOM interface, making it easy to connect to development boards such as the BMduino UNO.
Through UART communication via the BMCOM interface, dust concentration and other data can be read.
This module is suitable for dust monitoring, air-quality measurement, and smart-home applications.
The BME25K322A is a laser dust detection module from Best Modules, composed of an adapter board, cable, and the BM25S3221-1 laser dust sensor.
It uses the Mie scattering method to detect particulate matter in the air and outputs mass concentrations of PM1.0, PM2.5, and PM10.
The module is factory-calibrated and can be used directly without any additional circuitry.
With the included adapter board, the sensor’s 8-pin connector is converted into a standard 5-pin BMCOM interface, allowing seamless integration with development boards such as the BMduino UNO.
Dust concentration data can be retrieved through UART communication via the BMCOM interface.
It is suitable for applications such as air-quality monitoring, dust detection, and smart-home systems.
Features
Detection principle: Mie scattering
Detection targets: PM1.0, PM2.5, PM10
Communication interface: UART (via BMCOM adapter interface)
Output format: particulate concentration (μg/m³)
Supply voltage: 5V
Sensor module: BM25S3221-1 laser dust sensor
Factory-calibrated, no additional calibration required
Dimensions: based on the BM25S3221-1 sensor module
Package includes: BME25K322A module x1 (with adapter board and cable)
Function Overview
Pin Description
Pin
Name
Function
1
STA
PWM signal output
2
RX
UART receive line
3
TX
UART transmit line
4
VDD
Positive power supply
5
GND
Ground (negative supply)
6
VDD
Positive power supply
7
GND
Ground (negative supply)
8
SET
Power-saving mode configuration pin
Low level: enters power-saving mode
High level or floating: normal operation
