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It didn't hang - transmission just stopped and my program ended.
Same with the port-handler. The shell immediately displayed a new line prompt.
So i don't know what to expect if nothing is connected. I could measure execution time to see if more than 14 bytes are transmitted to nirvana?
Haven't checked IOSer.io_Error with my code yet.
Handshaking was always disabled - it's not supported by my hardware.
I will revert my code and do some more testing...
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