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Flash a Bonsai board
Connect the board over USB and this page writes a published firmware release to it. The files go from GitHub to the board through your browser, and nowhere else.
If the board does not appear
Hold BOOT, tap RESET, then release BOOT. That puts the board in download mode and it shows up as a serial port.
Chip
MAC
Flash
Port
Pick a version
Reading the published releases.
What gets written
Write the firmware
This takes about half a minute. Leave the board plugged in until it finishes.
Board
Version
Images