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AIR-1 Air Quality Sensor For Home Assistant

AIR-1 Air Quality Sensor For Home Assistant

Regular price $88.99
Regular price Sale price $88.99
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SCD40 CO2 Sensor
MiCS-4514 Gas Sensor


The Apollo AIR-1 is the most compact, feature-rich, affordable, and expandable air sensor for Home Assistant.  Utilizing wifi and ESPHome it is locally controlled with no subscription or cloud required. 

Powered via USB-C and a standard wall plug, the device uses WIFI to connect to ESPHome on your Home Assistant install. 

We proudly offer the software and CAD drawings to the community, encouraging all to modify and improve upon them. For more information, visit our GitHub or wiki. We're eager to see the innovative adaptations you come up with. Join our Discord community to share your unique remakes, or to engage in discussions about future products. 

Use Cases

The SEN55 particulate sensor is great for telling you about dust, pollen, and other particles in your air. Want to know if you should turn in your HVAC fan to filter your home air? Doing wood working in the garage? This will let you know when you might need to turn on a filter.


The optional CO2 sensor is very eye opening. Many people do not know the air in their office or bedroom reaches CO2 levels that have an affect on you. From poor sleep at night, drowsyness in the office, and brain fog can all be caused by high CO2. This sensor will let you know if your levels are getting too high and you need to turn on the air circulation or open a window.


The RGB leds are great for notifications. Trash night? Turn the LED green. Mail in the mailbox? Turn the LED blue. Air quality approaching bad levels? Turn red.



The AIR-1 measures only 61mm x 61mm x 30mm and has an aesthetic design to blend in.  

So what does the AIR-1 do?

PM1, PM2.5, PM4, PM10, VOC, NOx, Temperature, Humidity (SEN55)

**There is a temperature offset needed due to heat buildup from the ESP32-C3. We are still evaluating it but it is between 2 and 6 degrees C.

Many air quality measurements from a very reputable manufacturer. The sensor has a 10-year lifespan at continuous use (Most PM sensors only have 3 years) meaning you can have very short update intervals

  • Monitor 3d printers
  • Turn your air purifier on when air quality becomes unhealthy
  • Detect new paint fumes

CO (Carbon Monoxide), C2H5OH (Ethanol), H2, NO2, NH3 (Ammonia), CH4 (Methane) (MiCS-4514 From DFRobot) - Optional

** Our beta test group has noticed the methane reading will spike when exposed to high amounts of other gasses. We all believe this is manageable for the vast amount of automations still but wanted to let you know. It is much more a exists/doesn't exist type of gas monitoring vs the actual PPM readout, it will read 0ppm in normal air.

(This device does not meet the requirements for gas safety monitoring per the NBIC, NFPA, or IFC)

Monitor the individual gas percentages in your air with this optional add-on.

CO2 (SCD40) - Optional

This optional add-on brings a CO2 sensor to the package, which comes pre-calibrated and ready to use. (This device does not meet the requirements for CO2 safety monitoring per the NBIC, NFPA, or IFC)

  • Get alerts to open a window or automate your HVAC fan to run when CO2 levels are high.

Barometric Pressure (DPS310)

This pressure sensor feeds into the SCD40 (CO2) for more accurate readings


Bluetooth Tracker(ESP32-C3-Mini) - YAML Config Required

Track Bluetooth devices in your house, letting you know which devices are closest to the sensor. You will need to know the MAC of the Bluetooth devices you want to track.

  • Find your phone if you left it in the office or the bedroom.
  • Know who just walked into the room.
  • Track a beacon attached to your dog's collar.

RGB Pixels

Uses color-coded alerts for various home scenarios.

  • Flash red if the air quality is unhealthy.
  • Flash green on trash night.
  • Flash blue when it's treat time for your pup.

Power And Sensor Expansion Connector 

A connector that'll allow future sensors and power methods. A few expansion boards are in development currently but no set release date. Let us know what you'd like to see on the expansion slots.

What's in the box?

  • 1 x Apollo AIR-1 (Assembled board, and case)
  • Links to our documentation, open-source code, and CAD models
  • Sticker of Apollo 

 Extras Always available:

  • Access to our discord for support, product announcements, and home automation ideas.  Link
  • Access to our code and CAD files for you to remix or browse community remixes. Link

 Community Support: 

  • We hope to build a community on our discord and continue delivering products the community wants. Our team will be there to help answer any questions, suggestions, or problems you might have. Join us here: link
  • Wiki for documentation:



SmartHomeScene AIR-1

Simon Says AIR-1 Video

BeardedTechGuy AIR-1 Video


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Customer Reviews

Based on 40 reviews

Previously I'd been using an Ecobee to track air quality. After buying the Air1 I was blown away by how inaccurate the ecobee sensor was. Plus the shear number of sensors packed in this thing is awesome. At the price point nothing else comes close.

Mark Munsch

AIR-1 Air Quality Sensor For Home Assistant

Neil H.
Awesome sensor, super easy set up.

The AIR-1 was up and running on my existing Homeassistant set up (which already had esphome) in under 2 minutes, and worked flawlessly. I liked it so much I went and ordered the gas sensor upgrade to it.

Highly recommended.

Simon Roberts
Love my AIR-1 for keeping track of VOC and particulates in my wood-shop

Installed the device, easy connect to Home Assistant, and the data insights immediately led me to upping my protective gear. With a new mask/respirator, no more headaches (duh). See screenshot for VOC and particulates across a sanding then wood-finish this morning.

Brady Duga
Great product, easy integration

I have been meaning to make something like this for years, but have never gotten around to sourcing the parts, setting up the firmware, etc. Turns out Apollo Automation did all that work for me, with some quality sensors at a reasonable price. And integration into Home Assistant was trivial, with all sensors exposed. Definitely recommend this for tracking indoor air conditions.