I'm interested in general advice and experiences on developing prototype=20
devices using e.g. Arduino or other OS platforms, then transferring the=20
required hardware and evolved firmware to a custom PCB for commercial=20
production.

If OS libraries are used in the firmware, must they be declared/provided=20
with the final product, even if the end user has (or should have) zero=20
interest in further developing the product?

Just don't want to fall foul of any legalities after we've made any=20
number of such widgets.

Thanks,
Matt.
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