Since two days, my Teensy++2 giving me an error when I clicked Serial Monitor:
processing.app.SerialException: Serial port ‘COM10’ already in use. Try quiting any programs that may be using it.
* at processing.app.Serial.(Serial.java:173)*
* at processing.app.Serial.(Serial.java:92)*
What is wrong with me? There is no any other program which uses COM10.