Determine if new Arduino Uno is faulty

Development Tools IDE 1.x
1

Hi,

I have been trying for days to get a computer to recognise my Uno with no luck. I have tried it on Mac Mavericks, Ubuntu and Windows 8. How would I check if it is the board or whether it is to do with my setup?

Any help appreciated,

Regards,

Alex

2

Did you use also different usb cables ?

When you run lsusb in Ubuntu, connect the Arduino and run lsusb once more you should see the board. It if doesn't, there is something wrong. Is it an official board you just bought ?

3

I have tried 3 cables (2 belkin and 1 unbranded).

lsusb in Ubuntu produces the attached screenshot.

It is a brand new official (like out the box from a shop new!) Uno Rev 3.

Thanks,

Alex

Screenshot from 2014-09-22 17:26:43.png
Screenshot from 2014-09-22 17:26:43.png1366×768 198 KB

4

I think the first one, 0x3eb 0x2fef, is the Arduino board.
Does it disappear when the Arduino is disconnected ?

5

Yes it does, that must be the Arduino! I can now see it on Mac and Ubuntu but I am still not able to detect any USB serial ports?

Alex

6

I think you must make yourself member of the 'dialout' group in Ubuntu.
Type 'groups' to see in what groups your are.

When you have troubles with the serial port, the new Arduino 1.5.7 BETA is easier to use. It is easier in Windows and in Linux.

7

Thanks for the reply. I have tried the Beta version and still have no USB serial ports in Tools.

Alex

8

I have been told here that my Arduino Uno may not have a bootloader: Arduino Uno: Mac does not show USB as a serial port option - adafruit industries

Is this likely to be the problem? What can I do about it?

Alex

9

When it is faulty or doesn't have a bootloader, return it. Get a new one.

You can burn a new bootloader, when you have a programmer. But that is for advanced users. When there is no com-port at all, burning the bootloader might not be enough. I use a USBasp programmer, and in such situations there is perhaps 50% chance that a new bootloader will help.

10

Thanks for the replies. Are there any other tests I can do to determine if it definitely does not have a bootloader?

Appreciate the help,

Alex

11

Hi,

I swapped the board today. New one worked instantly! Thanks for the help determining it was faulty.

Cheers,

Alex

12

You are welcome. I'm glad the new one is working.