Serialport object behavior when copied

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Daniel on 12 Mar 2021
Edited: Daniel on 12 Mar 2021
I am reworking some code which used serial objects. As those are due to be removed, I am rewriting using serialport. In principle, I want to share the serialport object by copying it into the global variable space and retrieving it whenever a function is called.
My question now: Since serialport creates and opens at the same time, and I am able to copy the serialport object, how does the connection behave? There can't be two open connections at the same time.

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