As was explained earlier in the chapter,
GPS receiver configuration requires that you enter the correct COM
port number for your receiver. This information can be either
automatically detected in the GPS configuration dialog or easily
found by the user.
For Bluetooth devices,
open Devices and
Printers in Windows,
find your Bluetooth device, and double-click on it. The
tab will display the port
number, as shown below.
For USB devices, open
Manager and find your
device under Ports (COM &
LPT). The device name
will be followed by the port number, as shown below.