Home Assistant · Zigbee · Open Source

The $59 air quality sensor that talks to Home Assistant.

Five entities on your dashboard in minutes. VOC, CO2, temperature, humidity, and AQI over Zigbee. Works with ZHA and Zigbee2MQTT. No cloud. Fully open source.

Get Your AirCube — $59
Home Assistant

Five sensors on your dashboard. One device.

Pair the AirCube over Zigbee and get live temperature, humidity, CO2, TVOC, and air quality index entities in Home Assistant. Works with both ZHA and Zigbee2MQTT.

Custom quirk and external converter included in the docs. Pair it once and it reports every second. All data stays local.

Automations

Automate your air quality.

Build automations around real air data. Turn on a fan when VOCs spike. Send a notification when AQI crosses a threshold. Trigger ventilation by room.

The AirCube gives you the data. Home Assistant gives you the logic. You decide what happens next.

Also works without Home Assistant.

Don't have HA yet? The AirCube works out of the box. Plug it into USB-C and it glows based on air quality. No coordinator needed.

Green
Air looks good
Yellow
Consider ventilating
Red
Air needs attention

No app, no wifi, no account. Plug in and go.

Entities

What it exposes

Five sensor entities, updated every second.

Entity What it measures Unit
temperatureRoom temperature°C
humidityRelative humidity%
co2Estimated CO2 concentrationppm
tvocTotal volatile organic compoundsppb
aqiAir quality index—
Why AirCube

Built for the local-first smart home.

Zigbee 3.0
Connects via any Zigbee coordinator. SONOFF ZBDongle-E, ConBee, whatever you've got.
ZHA + Zigbee2MQTT
Works with both. Custom quirk and external converter provided in the docs.
No cloud. Ever.
Everything runs locally. No accounts, no internet required, no data leaving your network.
ESP32-H2
Native Zigbee on a modern, low-power chip. Hackable firmware, fully open source.
ENS161 + ENS210
VOC and CO2 sensing paired with precision temperature and humidity. Five entities from one device.
Fully open source
Schematics, PCB layout, firmware, BOM — all on GitHub. Fork it, modify it, build on it.
Hardware

Technical specifications

SensorsENS161 (VOC / eCO2), ENS210 (temperature, humidity)
MCUESP32-H2
ConnectivityZigbee 3.0 (native radio)
CompatibilityZHA, Zigbee2MQTT
LEDIN-PI15TAT5R5G5B addressable RGB
PowerUSB-C (5V)
Size49mm × 49mm × 36mm
Enclosure3D-printed PLA, diffused top
FirmwareOpen source (GitHub)
ReportingEvery second
🇺🇸 Designed & assembled in Texas

Built by a maker, not a corporation.

I'm Damian. I design and manufacture electronics from my home in Texas. The AirCube is fully open source — schematics, PCB layout, firmware, everything. If you want to inspect it, fork it, or build on it, you can.

Hardware and firmware are built together, not outsourced. If something breaks or you have a question, you're talking directly to the person who designed it.

Reviews

What people are saying

YouTube comment from a customer
YouTube comment from a customer
YouTube comment from a customer
YouTube comment from a customer
Questions

Before you buy

How does it connect to Home Assistant?
Over Zigbee 3.0. You need a Zigbee coordinator dongle (like the SONOFF ZBDongle-E, ~$13) plugged into your HA machine. The AirCube supports both ZHA and Zigbee2MQTT. Pairing takes about 30 seconds.
Does it require internet or cloud?
No. Everything runs locally over Zigbee. No accounts, no cloud, no data leaving your network. Ever.
What entities does it expose?
Five: temperature, humidity, CO2 (estimated), TVOC, and air quality index. Temperature and humidity are detected automatically. CO2, TVOC, and AQI require a custom quirk (ZHA) or converter (Z2M), both provided in the docs.
Can I build automations with it?
Yes. Any entity the AirCube exposes can be used as a trigger or condition in HA automations. Turn on a fan when VOCs spike, get a notification when AQI crosses a threshold, adjust ventilation by room — whatever you want.
Does it work without Home Assistant?
Yes. Plug it into USB-C and it works standalone as a color-coded air quality light. Green, yellow, or red. No coordinator, no setup needed.
Can I use multiple AirCubes?
Yes. Each one pairs independently and creates its own set of five entities. Name them by room and you have whole-home air quality monitoring.

$59. Open source.
Home Assistant ready.

The air quality sensor your smart home is missing.

Get Your AirCube — $59

Ships from Texas. 30-day satisfaction guarantee.