How to check if com Port is already being used by another application?

Processing Electronics (Arduino, etc.)
2

Hi
Port options

// display serial port list 
println(Serial.list());
printArray(Serial.list());
// get the first available port (use EITHER this OR the specific port code below)
String portName = Serial.list()[0];

// get a specific serial port (use EITHER this OR the first-available code above)
String portName = "COM5";

// open the serial port
port = new Serial(this, portName, 115200);

May in this links some hints if you looking for something else

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