Standard Arduino COM port already in use / COM port locking / Arduino uploading problem.
I use Arduino IDE 22 on Windows XP, with Arduino Mega 2560. It started getting locked no matter what I do. This is actually the second computer on which this is happening. The worst is that once Arduino locks a COM port not even rebooting will release it. Problem manifests itself when I try to upload a sketch. Even the basic Blink sketch takes infinite amount of time to upload. It never uploads.
- unplugging USB cable,
- resetting the Mega board,
- rebooting the computer,
- lowering COM port from COM 15 to COM 2,
- disabling than enabling the COM port,
- killing avrdude.exe and jawaw.exe manually in Windows XP Task Manager,
What else can I do?
What other processes can be locking a COM port?