A subtly obvious e-paper room air monitor
Details
- External ID
- 45962266
- Source
- HN
- Company
- —
- Product
- A subtly obvious e-paper room air monitor
- Website domain
- nicolin-dora.ch
- Launched
- Nov. 18, 2025
- Cohort
- —
- Upvotes
- 65
- Upvotes percentile
- 0.8624454148471615
- Tags
- —
- Fetched at
- Sept. 7, 2026, 9:25 p.m.
- Updated at
- Sept. 7, 2026, 9:25 p.m.
Description
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.
Enrichment
- Theme
- outdoor safety and environmental tech
- Vertical
- Horizontal
- Function
- Hardware & robotics
- Audience
- B2C
- AI stance
- Not AI
- Project type
- Commercial product
- Normalized one-liner
- e-paper room air quality monitor
- Manually corrected
- False
Could you build this?
No This is a physical DIY/commercial hardware build involving microcontrollers, physical environmental sensors (CO2/humidity), and an e-paper display.
What it would actually take: Creating this air monitor requires selecting and integrating physical hardware: an MCU (e.g., ESP32 or nRF52), precision environmental sensors (NDIR CO2 sensor like Sensirion SCD40, temperature/humidity sensor), and an e-paper display module. It requires embedded C/C++ firmware development, power management for battery life or low-power USB operation, PCB design, and CAD 3D modeling for the enclosure.
Discussion
20 comments analyzed.
Competitors mentioned: Aranet4, Awair Element, Heat recovery ventilator, ESP32 with BME280/Dallas and MHZ19
Concerns raised: SCD30 self-calibration assumes unrealistic 400 ppm baseline, atmospheric CO2 now higher, Self-calibration can lock onto wrong values if triggered during non-ventilated periods, Calibration lost when power cycled, drifts over time, Hard to expose sensor to atmospheric levels weekly in sealed buildings, Accuracy slightly lower than Aranet4 based on specs
Feature requests: 3D-printable stand design, Remote phone access when away from home, Automatic window opener integration with CO2 readings, Less distracting display refresh (segmented LCD instead of e-ink)
Competitors
Other products that read as similar to this one — 57 launches clear the similarity bar, closest 8 shown.
Attention rank: #9 of 58 (itself plus its competitors, highest first — normalized so YC and Product Hunt are compared fairly).
Looks like the first mover among its competitors.
- The Hidden Risks of Dry Indoor Air. · ph · 2026-09-08 · 1 upvotes · similarity 0.54
- Domihélie · ph · 2026-09-21 · 3 upvotes · similarity 0.47
- Dust-Proof Safety Glasses · ph · 2026-09-17 · 1 upvotes · similarity 0.41
- FullCare Air · ph · 2026-09-19 · 1 upvotes · similarity 0.40
- Fahrenheit · github · 2026-09-19 · 12 upvotes · similarity 0.39
- eMission Zero · ph · 2026-09-16 · 2 upvotes · similarity 0.38
- Room Temperature Calculator · ph · 2026-09-22 · 1 upvotes · similarity 0.38
- Keep My Screen On! · ph · 2026-09-14 · 2 upvotes · similarity 0.37
Other launches for this product
- No other launches for this product.
Same idea, different domain
Nobody's really built a hardware & robotics tool for Fintech yet.