The No‑Code Indoor Air Quality Monitor with Separate Display guide walks you through building a connected, real‑time environmental monitor using the Sensirion SEN66 sensor — all without writing a single line of code. The project captures key indoor air quality metrics such as temperature, humidity, particulate matter, and CO₂ levels, then sends that data to an external display for easy viewing at your desk or anywhere you choose. It’s powered by WipperSnapper firmware and Adafruit IO Actions, making setup entirely browser‑based and approachable for beginners while still offering robust features for experienced makers.
The guide actually contains two sub‑projects: you can build just the SEN66 sensor module and view its readings in a browser dashboard, or add a second microcontroller and display to create a dedicated, always‑on visual readout. The hardware list includes QT Py ESP32‑S3 boards, a Sensirion SEN66 breakout, optional NeoPixel Sticks for visual flair, and a 20×4 character LCD with an I²C/SPI backpack for simple wiring. Using WipperSnapper, each board is configured entirely online — you select sensors, assign feeds, and start streaming data to Adafruit IO without touching a code editor.
Once the system is running, Adafruit IO Actions let you create automated responses to changing air quality, such as triggering alerts when particulate levels spike or logging historical data for trend analysis. The external display can be placed anywhere convenient, giving you at‑a‑glance insight into your indoor environment. With its modular design, no‑code setup, and clear instructions, this guide makes it easy to bring professional‑grade air quality monitoring into your home, office, or workshop.
Learn more and make your own here.
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