Start by wiring your components so you can connect to Adafruit IO, install the WipperSnapper firmware, and run an initial test to confirm everything is functioning correctly. This ensures your hardware and cloud connection are solid before you move on to the full build.
For both the air quality monitor and the display unit, you have the option to add a NeoPixel Stick. This extra feature provides a bright, at‑a‑glance visual indicator of air quality status that’s visible from across the room — perfect for quick checks without looking at the LCD.
If you’re building the LCD display unit, you’ll first need to solder the Stemma LCD Backpack to your 20×4 LCD. Once that’s done:
- Connect the LCD to one QT Py using a Stemma QT cable.
- Connect your SEN66 breakout to a second QT Py with another Stemma QT cable.
- Use a 6‑pin GST cable to link the SEN66 sensor to the SEN66 breakout — this connection is essential for the sensor to function.
With these connections in place, you’ll be ready to power up, link to Adafruit IO, and start streaming live air quality data.
Learn about the LCD Backpack and how to assemble it here:
If you want to connect up a NeoPixel stick to your SEN66 QT Py, just wire it up exactly like the LCD QT Py.
Page last edited September 11, 2025
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