Arduino Forum

Using Arduino => Installation & Troubleshooting => Topic started by: Sonia_L on Mar 21, 2013, 09:52 pm

Title: Arduino Uno R3 cannot communicate with laptop
Post by: Sonia_L on Mar 21, 2013, 09:52 pm
I was using a windows xp professional SP3, and Arduino Uno R3 with starter kit. When I plugged in USB cable, I could hear the computer's sound for "recognizing" it, just like the sound when a computer recognizes a mouse.

But when I opened device manager--->Ports, I could only see Communications Port(COM1), no Arduino port. I was trying to update the driver on that port, but it didn't work. The "ON" light was on (green), and the "L" light was flashing yellow. Then I open Arduino software, and tried to upload the simple example "blink", this is the message I got:

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

I googled it and found out it means the computer is not communicating with Arduino Uno. I changed another USB cable, but the problem was the same.

Does anyone have any idea on this? Thanks!
Title: Re: Arduino Uno R3 cannot communicate with laptop
Post by: Louis Davis on Mar 21, 2013, 10:01 pm
Right click the Unknown Device in Device Manager
Select Update Driver Software
Select Browse my computer for software
Click Browse button
Select the Drivers folder under the location of your Arduino software installation. (Do not select the FTDI folder inside the Drivers folder)
Click OK
Click Next
Title: Re: Arduino Uno R3 cannot communicate with laptop
Post by: Sonia_L on Mar 21, 2013, 11:01 pm
Thanks Louis! My problem is there was no "Unknow Device" in the Ports, there was only COM1 under Device Manager--->Ports. But I did what you suggested with COM1, still didn't work...
Title: Re: Arduino Uno R3 cannot communicate with laptop
Post by: Louis Davis on Mar 21, 2013, 11:10 pm
Look for Unknown Device under Other Devices.

It will not show up under Ports until the driver is installed.
Title: Re: Arduino Uno R3 cannot communicate with laptop
Post by: Sonia_L on Mar 21, 2013, 11:22 pm

Look for Unknown Device under Other Devices.

It will not show up under Ports until the driver is installed.


Awesome! You help me solve the problem that I have been working on this whole afternoon!! Thanks so much!!! :D

Title: Re: Arduino Uno R3 cannot communicate with laptop
Post by: vally_09 on Mar 26, 2013, 12:37 pm
i have the same issue,and i followed those stepes and in Device manager arduino is shown in PORTS(COM &LPT),but i stiil get this error avrdude: stk500_getsync(): not in sync: resp=0x00.