Our OPT4048 breakout is ready — now with a bonus web app! 🌈💻

Adafruit Industries · May 14, 2025 · 2m

We're wrapping up the design for the OPT4048 breakout: mostly putting the finishing touches on the Arduino library (https://github.com/adafruit/Adafruit_OPT4048). Since the whole point of this sensor is that it gives you CIE X & Y coordinates, we thought it would be cool to plot that onto a CIE diagram (https://en.wikipedia.org/wiki/CIE_1931_color_space). Historically, we’d have to use Processing (https://processing.org/), but now you can use WebSerial to get data directly from a microcontroller! Only catch — it’s been like 15 years since I wrote JavaScript, so we asked Claude Code…