@noel - USBDeview appears to be a Windows app and I’m doing this on a Mac. The serial ports on a Mac may be displayed in Terminal using the command “ls /dev/cu.*”. At any rate, I think I’m going down the wrong road; what I need is a list of paired Bluetooth devices and devices available for pairing on my Android tablet. Therefore, I don’t think “println(Serial.list(this))” will work for this purpose. Hopefully, there is another way to find Bluetooth devices using Processing Android; I need to read some more. Thanks.