Most people dont think about air quality until it becomes a problem. It might not be random if youve ever felt sluggish in a home office or noticed your allergies acting up indoors. CO2 levels, humidity, and temperature all affect how comfortable and healthy your home actually is. A car fire at my neighbors house a few months ago reaffirmed this for me. The SwitchBot Meter Pro CO2 Monitor is built to make tracking air quality easier and integrates with HomeKit over Matter.HomeKit Weekly is a series focused on smart home accessories, automation tips and tricks, and everything to do with Apples smart home framework.What can it do?At its core, theSwitchBot Meter Pro CO2 Monitoris a5-in-1 sensorthat measures:CO2 levelsTemperatureHumidityTime and dateComfort levelbased on the air qualityIt features alarge, easy-to-read display, and the built-in battery lasts up toa year. More importantly, it can send alerts when CO2 levels get too high, telling you when to crack a window or turn on an air purifier. Of course, you can automate the latter over HomeKit. Whats needed for HomeKit support?Heres the catch before you purchase: this isnt a native HomeKit device. It works with the SwitchBot app, but to get it into HomeKit, you have to enable Matter support through a SwitchBot Hub 2, which acts as a bridge. The Hub 2 supports Matter, and thats your way into HomeKit. Once set up, HomeKit will recognize the SwitchBot Meter Pro as a temperature and humidity sensor (though not as a CO2 monitor). That limitation aside, it still opens the door for useful automation opportunities within HomeKit.What can it do within HomeKit?Bridging this device over Matter/the Switchbot Hub into HomeKit adds some nice automation options:Trigger a smart plug to turn on an air purifier if humidity rises.Turn on a HomeKit-enabled air purifier based on readingsAdjust a HomeKit-enabled thermostat based on temperature readings.Get Siri updates by asking for the current temperature or humidity in a room.Use automations to flash a HomeKit-compatible light red when air quality worsens.The most significant missing option for it is that CO2 readings dont show up in HomeKit. If you want CO2 alerts, you must use the SwitchBot app alongside HomeKit. Its not ideal, but its better than nothing. The Switchbot app is pretty useful overall.Wrap upOverall, its a really useful and good looking product. If youre looking for a fully HomeKit-native CO2 monitor, this isnt it. But if youre okay using SwitchBots Hub 2 as a bridge, the SwitchBot Meter Pro CO2 Monitor can still be a useful addition to your HomeKit environment. It wont unlock every feature inside HomeKit, but with temperature and humidity automations, it can still unlock some pretty nice use cases.You can buy the SwitchBot Meter Pro CO2 Monitor from Amazon or directly from Switchbot. Add 9to5Mac to your Google News feed. FTC: We use income earning auto affiliate links. More.Youre reading 9to5Mac experts who break news about Apple and its surrounding ecosystem, day after day. Be sure to check out our homepage for all the latest news, and follow 9to5Mac on Twitter, Facebook, and LinkedIn to stay in the loop. Dont know where to start? Check out our exclusive stories, reviews, how-tos, and subscribe to our YouTube channel