Flutter supports individually addressable RGB LED strips such as the WS2812 based strips. Sometimes they are called Neopixels, the name Adafruit uses to refer to them.
The official Adafruit library, while a wonderful open source contribution on their part, blocks all system interrupts while writing to the strip, breaking time keeping and thus frequency hopping on Flutter. Problem! Fortunately, I was able to update the library to use Flutter's hardware timers. The updated library can address at least 1000 LEDs without disturbing the time keeping system.
Wiring up the LEDs is easy. Most LED strips already come with the appropriate three wire connector, so you just need to solder it to a board such as the Breakout board. Hook up 5v power to the RAW voltage line, ground to ground, and signal to a hardware timer output like S2. We should be able to use D9 in the future, but I need to do some more work on the hardware timer library for that output. Wiring should be done as below:
In the future we'll include a link to the updated driver as well as example code.