I have an ARDUINO UNO and installed it on both a windows vista and a windows 7 machine. Basically i see only COMport 3 whether the arduino is connected to the computer or not - i suspect the computer is just not able to communicate with the board. Therefore i am unable to run even the BLINK program. Any help would be greatly appreciated.
I have already looked at the troubleshooting section to no avail.
I'm guessing you've already tried uploading to COM3 with the board plugged in?
I am using the modified version in http://arduino.cc/forum/index.php/topic,118440.0.html and still basically have the same problem
I have 4 versions of IDE on my Vista laptop - but thinking about it I've never actually connected a board with 8U2 or 16U2 USB/Serial adapter since I stopped using a Duemilanove for testing(all custom boards now, I don't torture myself with those ridicously small chips).
More than likely you are just missing the Uno driver.
Can you connect to the board, do the Settings: Control Panel: Add New Hardware and browse to the Uno file:
C:...\Arduino-1.0.1\drivers\Arduino UNO REV3.inf as an example path?
Karthik77:
I am using the modified version in http://arduino.cc/forum/index.php/topic,118440.0.html and still basically have the same problem
You see the com port but can't use it? are you sure the com port is the arduino? can you open the serial monitor and send something so the RX led blinks in the arduino?
The issue with arduinos is that we don't have like a lot of "error codes", there are few problems, but lot of causes.