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17/05/2017 at 11:19 #6888
Alex [Tobii]
Participant
Hi!
Hard to say where exactly you get Null reference exception, but I would guess that in serial.Open();
And most likely it’s because you are trying to open the port twice.
Check https://msdn.microsoft.com/en-us/library/system.io.ports.serialport.open(v=vs.110).aspx