== Firmware ==
Updating (or downgrading) a firmware is done by unpacking the update zip file to the root directory of the microSD card (from a PC). Then insert to the M4 and powercycle the CPC/M4 board, after about 20 seconds it should be updated. Verify with |version command.
Latest firmware version can always be obtained via |upgrade command (no need to use PC, as long as CPC is setup to the internet).
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