Hi
Im using an uno, cos its all i have. Also i am on windows 10. Before i upgraded to windows 10 i never had an issue but now i cant seem to upload sketches. I just get this error
Arduino: 1.6.5 (Windows 8.1), Board: "Arduino/Genuino Uno"
Using Port : COM3
Using Programmer : arduino
Overriding Baud Rate : 115200
avrdude: ser_open(): can't open device "\\.\COM3": The semaphore timeout period has expired.
avrdude done. Thank you.
Problem uploading to board. See http://www.arduino.cc/en/Guide/Troubleshooting#upload for suggestions.
Any idea whats going on?