Is it essential to upload a sketch to a arduino board without connections to circuitry?
Or is it ok to upload after the board is wired into the project it is intended for?
- You can do either.
Note that on AVR based boards, pins 0 and 1 are used by the hardware Serial interface and to upload code. If you have anything connected to those pins then it may interfere with the upload
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Thanks for the prompt replies!
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