Serial Port 'Com5' is already in use.

Forum 2005-2010 (read only) Hardware Troubleshooting
1

Hi,

I'm new to Arduino. I have a brand new Duemilanove. I'm using windows xp, and version 0012 of the development environment.

I'm just getting started, but can't upload sketches to the arduino. I get the message 'Serial port 'COM5' already in use. Try quiting any programs that may be using it.'

I've tried removing and reinstalling the drivers. And a reboot or two.

Duemilanove doesn't appear in the list of boards, so I've left 'Diecimila' selected.

Any ideas?

2

Perhaps you can try changing the port that the FTDI USB drivers are using. (System Prop | Hardware | Device Manager -> Ports, "FTDI something", Port Settings, Advanced) You need to have the Duemilanove plugged in for this.

Select another port (COM 6) and see if COM 6 is listed in the IDE under Tools | Serial Port.

This may help get you started.

I think "Diecimila" is OK for the Duemilanove.

3

Found it. There was another application - a (mobile) Phone Connection Link application that was scanning all com ports just in case I happened to plug in a phone....

I tried changing the com port as you suggested, but all were "in use"; thats when I got really suspicious. Another google on 'com port in use' and I found lots about phone sync applications! Bingo.

Thanks for you help.