Old Way: For Non-Express Boards Without A Uf2 Bootloader (Feather M0 Basic Proto, Feather Adalogger, Arduino Zero); Running Out Of File Space On Non-Express Boards - Adafruit Feather M4 Express Manual

2. Double-click the reset button on the board to bring up the
3. Drag the erase
.uf2
4. The onboard NeoPixel will turn yellow or blue, indicating the erase has started.
5. After approximately 15 seconds, the mainboard NeoPixel will light up green. On the NeoTrellis M4 this is the
first NeoPixel on the grid
6. Double-click the reset button on the board to bring up the
7. Drag the appropriate latest release of CircuitPython
the drive.
boardname BOOT
It should reboot automatically and you should see
If the LED flashes red during step 5, it means the erase has failed. Repeat the steps starting with 2.
If you haven't already downloaded the latest release of CircuitPython for your board, check out the installation
page (https://adafru.it/Amd). You'll also need to install your libraries and code!
Old Way: For Non-Express Boards with a UF2 bootloader (Gemma M0, Trinket M0):
If you are running a version of CircuitPython before 2.3.0, and you don't want to upgrade, or you can't get to the REPL,
you can do this.
1. Download the erase file:
2. Double-click the reset button on the board to bring up the
3. Drag the erase
.uf2
4. The boot LED will start flashing again, and the
5. Drag the appropriate latest release CircuitPython
It should reboot automatically and you should see
If you haven't already downloaded the latest release of CircuitPython for your board, check out the installation
page (https://adafru.it/Amd)
Old Way: For non-Express Boards without a UF2 bootloader (Feather M0 Basic Proto,
Feather Adalogger, Arduino Zero):
If you are running a version of CircuitPython before 2.3.0, and you don't want to upgrade, or you can't get to the REPL,
you can do this.
Just follow these directions to reload CircuitPython using
.
CIRCUITPY

Running Out of File Space on Non-Express Boards

The file system on the board is very tiny. (Smaller than an ancient floppy disk.) So, its likely you'll run out of space but
don't panic! There are a couple ways to free up space.
The board ships with the Windows 7 serial driver too! Feel free to delete that if you don't need it or have already
© Adafruit Industries
file to the
boardname BOOT
CIRCUITPY
https://adafru.it/AdL
https://adafru.it/AdL
file to the
boardname BOOT
CIRCUITPY
You'll also need to install your libraries and code!
https://learn.adafruit.com/adafruit-feather-m4-express-atsamd51
boardname BOOT
drive.
boardname BOOT
(https://adafru.it/Amd)
in your file explorer again.
boardname BOOT
drive.
drive will reappear.
boardname BOOT
(https://adafru.it/Amd)
in your file explorer again.
(https://adafru.it/Bed), which will erase and re-create
bossac
drive.
drive.
file to
.uf2
drive.
file to the
.uf2 boardname BOOT
drive.
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