HI,

I have programmed a gui and I want to realize a button that checked, if the arduino is connected to the pc via USB(serial) and I used the Serial library.

When the Arduino is connected so it will pop up a window with the message OK, if the arduino isn't connected so it will pop up a window with "failed".

But I have a problem to realize this, because I don't know, if there are a function to check all the ports whether the arduino is connected.

 

I programmed this with the available() but this doesn't work see here:

1. import processing.serial.*;
   
   Serial myPort;
   
   void check_connection_click() // This is the event when i press the button Check connection
   
   {
   
   myPort= new Serial(this, Serial.list()[0], 9600);
   
   if (myPort.available()==4)
   
   {
   
   connection_ok.setVisible(true);
   
   }
   
   else {
   
   connection_failed.setVisible(true);
   
   }

So but this is not what I want, I would like to recognize whether my arduino is connected via usb( don't care which port),  to my pc, is it possible?

 

Thanks a lot .