Back to Home11/18/2025, 7:14:03 AM

A subtly obvious e-paper room air monitor (Part 1: Why?)

nomarv
1 points
1 comments

Mood

thoughtful

Sentiment

positive

Category

tech

Key topics

IoT

air quality monitoring

DIY electronics

The author built an e-paper room air monitor to track humidity and CO2 levels, and shares their motivation and design process in a blog post, sparking a discussion on the importance of indoor air quality.

Snapshot generated from the HN discussion

Discussion Activity

Light discussion

First comment

N/A

Peak period

1

Hour 1

Avg / period

1

Comment distribution1 data points

Based on 1 loaded comments

Key moments

  1. 01Story posted

    11/18/2025, 7:14:03 AM

    14h ago

    Step 01
  2. 02First comment

    11/18/2025, 7:14:03 AM

    0s after posting

    Step 02
  3. 03Peak activity

    1 comments in Hour 1

    Hottest window of the conversation

    Step 03
  4. 04Latest activity

    11/18/2025, 7:14:03 AM

    14h ago

    Step 04

Generating AI Summary...

Analyzing up to 500 comments to identify key contributors and discussion patterns

Discussion (1 comments)
Showing 1 comments
nomarv
14h ago
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.
View full discussion on Hacker News
ID: 45962266Type: storyLast synced: 11/18/2025, 7:14:39 AM

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