USB serial Port not found

Using Arduino IDE 1.x
1

About an hour I was able to upload onto my arduino Uno but now the USB serial Port won't come up for me to be able to select it and I can't upload anything.

I'm using a Mac, an Arduino Uno. I've tried some of the suggestions that I found on the web but nothing seems to make a difference.

Help would be greatly appreciated :slight_smile:

2

If you have the Serial Monitor ON (Displayed), close it, then disconnet the UNO from USB, reconnect the UNO and check if COM port is now available.

Bob

3

Your driver probably isn't installed properly. This is how I solved the problem.

Go to your Control panel > hardware and sounds > device manager > Ports

  • then you should see "Unknown device". Double click on it
  • Click on the "Driver" tab
  • Click on "update Driver"
  • Click on "Browse my computer for driver software"
  • click "browse" and select the "drivers" subfolder in your Arduino folder.
  • Click "next" and hopefully, your computer will install the driver for you successfully
    Goodluck :slight_smile:
4

Do you have 1.0.3 or the beta arduino IDE?

5

togobingi:
Your driver probably isn't installed properly. This is how I solved the problem.

Go to your Control panel > hardware and sounds > device manager > Ports

Okay but they are on a Mac, so none of this applies.

When switching to the Duemilanove, did you remember to change the board type in the IDE?