Hello Everyone
When I upload the program, it took long first then it says ''COM4 already in use try quiting other program may be using it''. I checked in Device manager it says under Ports (COM & LPT) that COM4 is assigned to Arduino Mega 2560 (COM4). I reconfirmed it by checking in Arduino IDE in Tools menu which says ''Serial Port -> COM4''.
Thats very annoying.
If somebody know the solution kindly let me know.
Thanks for reading my problem.
Regards
Hassan
Don't know, but a "Standard Windows Corrective Manoeuvre" may help.
Worth a try is:
In Windows, navigate: Start -> Right-click on 'Computer' -> Select 'Properties'. Then select Device manager.
Right-click on 'Universal Serial Bus Controllers' and select 'Scan for hardware changes'
Right-click on 'USB Virtualization' and select 'Scan for hardware changes'
Still in Device Manager, expand 'Mice and other pointing devices' and check for Microsoft Serial Ballpoint. Sometimes Windows installs a driver for that when you plug in an unrecognized device and causes all sorts of problems.
John.
