Description

ESP-AirSense SCD30

Indoor air monitor built on ESP32-WROOM-32, 1.8″ TFT 128×160 SPI (ST7735), and Sensirion SCD30 (NDIR). The SCD30 measures CO₂ in 0–40,000 ppm (typical calibrated band 400–10,000 ppm). Firmware samples every 2–10 s, applies ABC (Automatic Baseline Correction) and supports manual offset calibration (e.g., outdoor ~400 ppm) so you can set a “healthy” target (commonly ≤800 ppm) and derive clear ventilation guidance.

On-device UI shows large CO₂ (ppm) and a color status:

< 800 ppm: Good (green)
800–1000 ppm: Caution (yellow)
1000–1400 ppm: Ventilate (orange)
> 1400 ppm: Stagnant / high risk (red)

Schematic and Layout

schematic

imagen_2025-11-06_160019577.png

layout_top

imagen_2025-11-06_160037610.png

layout_bottom

imagen_2025-11-06_160051106.png

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Nov 07,2025

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ESP-AirSense SCD30

ESP-AirSense SCD30: CO₂/T/RH monitor with color UI, calibrated to healthy ppm to flag when to ventilate and keep rooms safer.

122

Published: Nov 07,2025

Standard PCB

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BOM(Bill of materials)

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