AirQuality

Air Quality Sensor

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Overview

A multi-parameter digital air-quality sensor that returns temperature, humidity, an overall air-quality index, volatile organic compound (VOC) levels, and equivalent CO₂ — all from a single 37×27 mm module. The IC handles its own warm-up, calibration, and gas-correlation math — read each value with simple text commands over any supported interface.

Common uses: smart ventilation triggers, classroom air monitoring, plant-growth chambers, IoT dashboards, and HVAC feedback loops.

Key features • Reads temperature • Reads humidity • Reads air quality • Reads organic componds • Reads CO2 levels • 37x27mm Overall Dimension

Resources 📄 Schematics 🔩 3D STEP file PID: 0x060002

🌿 Cables not included

Modules ship without cables to reduce waste. Some specialty boards include a USB cable; for the rest, see Cables to add cables to your order.

Commands

Commands this module accepts. See Samples for runnable code in popular host languages.

Function	Description
AhtTemp()	Returns ambient temperature in celsius.
AhtHumid()	Returns relative humidity.
EnsAqi()	Returns air quality index.
EnsTvoc()	Returns Total Volatile Organic Compounds.
EnsEco2()	Returns equivalent CO2.
DVer()	This driver version.

Peek under the hood

The script below is this module's driver — it teaches the hardware how to respond to the commands listed above. It ships pre-loaded from the factory; most users never need to open it.

AirQuality Driver

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See full example on GitHub

Samples

Example code that calls this module's commands from popular host languages.

tip

New here? See Get Started to connect a module and send your first command.

Python

Python Sample

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See full example on GitHub

MicroPython

MicroPython Sample

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See full example on GitHub

JavaScript

JavaScript Sample

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See full example on GitHub

.NET

.NET Sample

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See full example on GitHub

Arduino

Arduino Sample

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See full example on GitHub

MicroBlocks

This sample runs in MicroBlocks on a any host board that's connected/tethered to this module, or a chain of modules. This module keeps its official DUELink firmware and module driver and responds to commands from the connected MicroBlocks-running host. New here? See the MicroBlocks page.

There are two ways to use it:

Open the full sample — the complete project (the module's library plus a ready-to-run example) opens directly on the MicroBlocks website.

Add just the libraries to your own project — copy the link, then in your MicroBlocks project click Add Library → Cloud and paste it. This loads this module's libraries into your project without replacing your current work.

Copy Library Link

On-Module Code

Code that runs directly on this module's MCU. See how On-Module Code allows modules to run standalone.

Script

This example runs using the default DUELink Internal Engine using its Scripting Language, and it expects the module's driver to be loaded first, see the Commands Tab.

Standalone Script Sample

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See full example on GitHub

Arduino IDE

See Arduino IDE page for more info.

Standalone Arduino Sample

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See full example on GitHub

Ordering Info

Product	Part Number	Price
DUELink AirQuality	GDL-SEAIRQLTY-A	$19.95

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