My Serial Port COM9 has vanished
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Please be positive and constructive with your questions and comments.
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- Posts: 19
- Joined: Sat Jul 21, 2012 4:35 am
My Serial Port COM9 has vanished
I have been successfully running my Arduino Uno R3 on my Win XP PC's COM9. However, although the Arduino is still powered, the Arduino software can no longer identify COM9. I have tried plugging in to different USB sockets, but this makes no difference. Can you please help?
- floresta
- Posts: 223
- Joined: Thu Jul 31, 2008 10:27 am
Re: My Serial Port COM9 has vanished
The operating system typically assigns a different COM port number when you change USB sockets. Your best bet is to use 'Device Manager' to determine the appropriate COM port number.I have tried plugging in to different USB sockets, but this makes no difference. Can you please help?
- Connect your Arduino to a USB socket
- Click on 'Start'
- Right click on 'My Computer' and select 'Properties'
- Select 'Hardware' and then 'Device Manager'
- Expand Ports (COM & LPT) by clicking on the + sign
- Look for the USB Serial Port to determine the COM port assignment
Don
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- Posts: 19
- Joined: Sat Jul 21, 2012 4:35 am
Re: My Serial Port COM9 has vanished
Thank you for your help. I discovered that the problem was due to the fact that I had not pushed the USB connector fully home. I was getting power, but not all connections had been made.
Please be positive and constructive with your questions and comments.