Geeetech

I am having a problem connecting to the Prusa i3 Pro c printer. I get the "Access to the port COM3 is denied" message.

I am running Windows 8.1 64-bit.

Looking through the forums, I found the topic "How to install Mega2560 in win8.1" and began walking through the steps. However, when I attach the USB cable, instead of a COM port called "Arduino Mega 2560", I have a COM port called "USB Serial Port(COM3)". I tried following the instructions to update the driver, but after browsing to the arduino 1.0.1 driver folder, I get the message "Windows has determined the driver software for your device is up to date. USB Serial Port" and I still get the access denied message.

Can you give any advice why the COM port is different and how to connect the computer to the printer?

the com3 is for the printer,it means that you have connected priner to you PC successfully.Please select the com 3 in arduino.

OK. I tried opening the serial monitor in Arduino and it said the com3 port was in use by another program. I accidentally installed the repetier-server software and that was loading on startup and hijacking the com3 port. Shutting that off allowed me to make the connection in reptier host.

Thanks