The Feather M4 Express uses the extra space left over to add a Mini NeoPixel, 2 MB SPI Flash storage and a little
prototyping space. You can use the SPI Flash storage like a very tiny hard drive. When used in CircuitPython, the 2 MB
flash acts as storage for all your scripts, libraries and files. When used in Arduino, you can read/write files to it, like a
little datalogger or SD card, and then with our helper program, access the files over USB.
Easy reprogramming: the Feather M4 comes pre-loaded with the UF2 bootloader (https://adafru.it/vQd), which looks
like a USB storage key. Simply drag firmware on to program, no special tools or drivers needed! It can be used to load
up CircuitPython or Arduino IDE (it is bossa-compatible)
Comes fully assembled and tested, with the UF2 USB bootloader. We also toss in some headers so you can solder it in
and plug into a solderless breadboard.
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