ELECFREAKS Octopus PM2.5 Module

In stock


PM2.5 Electronic brick is one of the modules in OCTOPUS series to test the PM2.5 concentration . Based on ZH03 laser dust sensors, it can test the dust particle in the air with high consistency and stability. The PWM output and serial port design also make it easily to operate.


It is compatible to both 3V/5V devices.
It is compatible to micro:bit or Arduino products.
It is equipped with standard 3 wires GVS interface.
It is of high consistency and accuracy with a real time response, the 0.3 μm diameter particle can be recognized.
With PWM output and serial port supported.

Outlook and Dimension for Installment

Diagram for Pins Connector

Introduction to Main Function Modules

ZH03B Sensor

ZH03B sensor is used to test the PM2.5 concentration in the air.

3PIN Standard GVS Electronic Brick Interfaces

With standard 3PIN electronic brick interfaces, "S" is the output pin for 3.3V PWM signal.

4PIN Serial Output Interfaces

The output interfaces are used for 3.3V serial signal.

Quick Start

Hardware Connection
Connect PM2.5 electronic brick module to P1 port on micro:bit with a micro:bit expansion board.

Step 1 Start with Makscode
Open the on-line programming page for makecode.
Step 2 Add Package
Search the key word with "iot", and add the software package called "iot-environment-kit".

Step 3 Programming

Step 4 Download
The complete program is below: https://makecode.microbit.org/_4TvKWEihahzh
You can also download it directly from below:


The value of PM2.5 is scrolling displaying on the 5x5 screen with μg/m3 as a unit.


Items Parameter
Name PM2.5 Electronic brick
Version V1.2
SKU EF04090
Operation Voltage DC 3-5V
Working Current <120 mA
Sleep Current <10 mA
Operating Temperature -10~50°C
Detective Gas PM2.5
Dimension 50.00mm x 50.00mm
Net Weight 46.30g

Package List

Items Quantity
Octopus PM2.5 module 1
3 pin F/F jumper wire 1

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