Under Device Manager, my Arduino Mega 2560 is connected via USB to COM4. However, when I go to upload a program to it, under Tools -> Serial Ports, only COM3 shows up. My drivers are up to date. Also, COM3 seems to be in use, according to Device Manager. COM3 is the only one that shows up, regardles…

COM4 Serial Port not showing up

system January 26, 2011, 5:07am 3

Windows 7 x64. Is there any way to fix these problems?

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