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Octopus PM2.5 module


Elmwood Electronics has stopped accepting orders. This product might be available at PiShop.ca. Please check this blog post about our recent team merger.

Octopus Electronic Bricks! You can use them build electronics projects just as easy as piling bricks! By using Octopus electronic bricks, you may connect Arduino or compatible boards easily with various digital, analog and I2C/Uart interfaces. These breadboard-less firm connections includes an extensive collection of modules like potentiometers, sensors, relays, servos, and even buttons.  Just plug and play!

The Octopus PM2.5 module is based on ZH03 laser dust sensors. It can test the dust particles in the air with high consistency and stability. The PWM output and serial port design also make it easily to operate.


  • Compatible with both 3V/5V devices
  • Compatible with micro:bit or Arduino products
  • Equipped with standard 3 wires GVS interface
  • High consistency and accuracy with a real time response, 0.3 μm diameter particles can be recognized
  • Both PWM output and serial port supported.

Pin Connector Diagram

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.

Software Programming

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


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



Octopus PM2.5 module

Collections: ElecFreaks

Type: Octopus Electric Bricks