Thanks to forums user deshipu for writing in with these various pieces of source code that utilize Micropython on the ESP8266, for various FeatherWings.
About the CharlieWings, deshipu writes,
Looking at the datasheet, I noticed that this chip is capable of quite more than the Adafruit libraries allow, so I went ahead and included support for additional features:
Blinking pixels Switching between frames Fading between frames Automatic animation Music-driven animation
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Adafruit 15×7 CharliePlex LED Matrix Display FeatherWing – Red: You wont be able to look away from the mesmerizing patterns created by this Adafruit 15×7 CharliePlex LED Matrix Display FeatherWing. This 15×7 LED display can be paired with any of our Feather boards for a beautiful, bright grid of 105 charlieplexed LEDs. It even comes with a built-in charlieplex driver that is run over I2C.
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