A subtly obvious e-paper room air monitor
In the cold season we tend to keep the windows closed. The air gets "stale": humidity often rises above 60 %, which can harm our wellbeing and promote mould. At the same time the CO₂ level in the air increases, which impacts our ability to concentrate. So I built a room air monitor that stays unobtrusive as long as everything is in the green zone, but becomes deliberately noticeable once thresholds are exceeded. For my personal love of statistics I also visualise the measurements in a clear dashboard.
In plain words
A subtly obvious e-paper room air monitor displays indoor air quality by tracking humidity and CO₂ levels. The device remains discrete when conditions are healthy but becomes noticeable when humidity exceeds 60% or CO₂ rises too high, signaling when ventilation is needed. It includes a dashboard for viewing detailed measurement history and statistics. The monitor addresses wellbeing concerns during cold seasons when windows stay closed, helping prevent mold growth and maintain concentration levels.
written from the facts on this page · September 2026
Does the same job
all alternatives →- ALAir Lab – A portable and open air quality measuring device2025 · networkedartifacts.com · ▲497
Hi HN! I’ve been working on an air quality measuring device called Air Lab for the past three years. It measures CO2, temperature, relative humidity, air pollutants (VOC, NOx), and atmospheric pressure. You can log and analyze the data directly on the device — no smartphone or laptop needed. To better show what the device can do and how it feels like, I spent the past week developing a web-based simulator using Emscripten. It runs the stock firmware with most features available except for networking. Check it out and let me know what you think! The firmware will be open-source and available…
- EPE-Paper 7-color display showing the current weather2024 · github.com · ▲229
A hobby project of mine that was surprisingly easy to put together! I love waking up and seeing the freshly generated image.
- LALive Air Quality Monitor2025 · github.com · ▲19
A comprehensive indoor air quality monitoring system built with ESP32-C3 Super Mini and multiple environmental sensors. This project helps you monitor CO2, temperature, humidity, volatile organic compounds (VOCs), nitrogen oxides (NOx), and particulate matter (PM1.0, PM2.5, PM10) to maintain healthy air quality in your home or office.
More work this month
the category →
The app store for voice native apps that lives in your notch
Work · 28d ago · voiceos.com
The New Calendly▲211Handle all of the work before, during, and after meetings
Work · 17d ago · calendly.com
Launched alongside, November 2025
the whole month →
- IB
Life & fun · Nov 2025 · bitsnpieces.dev
- BBoing▲782
Life & fun · Nov 2025 · boing.greg.technology