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Arduino changing serial com ports

July 23, 2013 | 9:14 am

Hi I am creating a permanent installation using an arduino. The install needs to start up and run on its own on a mac mini. I have noticed that the arduino jumps between serial port a and c every time I restart the computer. I tried to get around this by including message "port usbserial-A4001lMt, open" but I’m worried that this will change too. Is there anyway to get around this or to specify whichever port the arduino is using every time?

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August 9, 2014 | 2:33 pm

Guess you don’t need the answer any more, but i will write it anyway. if you keep arduino connected to the same usb computer port and use the name of the port instead of a, b, c etc you should be fine….


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