Forums > MaxMSP

Windows USB port name

July 27, 2012 | 9:00 pm

Hey guys,
just finished an ardiuno/max project for a client running PC and I am unsure of the specific port names windows assigns for his USB outlets. I use and program on Macs so I always see the dev/tty/usbmodem641 or 411…what is the windows equivalent of this?

July 29, 2012 | 2:43 am

When Arduinos are plugged in on Windows machines, their USB port will be identified as COMx, where x is a number between
1-??? (I don’t know the upper limit, but would suspect 256 or smaller).

Every Arduino you plug into a given machine will have a different COM port number.
Note, plugging the same Arduino in on different windows machines will most likely cause that Arduino to be mapped to a different COM port number. If it happens to get mapped to the same number on multiple machines, it is by coincidence only.

To identify which COM port number, open Control Panel, System, Hardware, click the + sign to expand the COM ports.
Do this before and after you plug in the Arduino. You should be easily able to find which COM port is assigned to the Arduino.

If you still have problems, send me a PM to remind me.
Sometimes I forget which messages I reply to, so I don’t always look for replies.

July 30, 2012 | 9:20 pm

perfect! just finished it,

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Forums > MaxMSP