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uploading sketch with Windows 7 - no COM3

kjhart0133

Hello all,

 

I just migrated all my Arduino stuff to a Windows 7 PC.  I was using a MAC with no problems, but since I've started looking into wireless with XBees I need to use X-CTU which only runs on a PC. <sigh>  X-CTU is necessary to program the XBees in API mode, etc. etc.  Anyway, now I'm having a problem uploading sketches using the PC.  I keep getting the following message:

 

avrdude: stk500_getsync(); not in sync: resp = 0x00

 

I believe this has something to do with the COM port.  I only see COM1 and COM2, which Arduino can't use, COM3 does not seem to come up and the sketches won't upload.

 

Any help is greatly appreciated.

 

Thanks,

 

Kevin H.

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  • 0

    Mark and Nico,

     

    Thanks for the helpful information.  I was able to use Nico's instrutions and successfully (I think) loaded the Arduino driver.  I now see COM4 on the list of ports under Tools>Serial Ports.  I still, however, have the same problem even when selecting COM4.  I get the exact same error when I try to upload even a simple sketch like the Blink program:

     

    avrdude: stk500_getsync(): not in sync: resp=0x00

     

    Any other suggestions?

     

    Kevin H.

  • 0 in reply to kjhart0133

    Hi Kevin

     

    Do you have the wireless modules plugged in at the same time you are trying to upload the sketch?  If so, and if the tx/rx lines are connected to the Arduino's tx/rx pins, they may be interfering with the transfer.

     

    Have you tried uploading to a plain vanilla Arduino with no shields or modules?

     

    Regards

     

    Terry

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