●The window in which you enter the passkey will not appear once you have connected
more than two times to the device.
●if the device with that software was the Bluetooth 2.1+EDR device, sometimes you can
pair the devices without PIN codes (such as HID devices).
4.3 Manually creating a virtual Bluetooth COM port
In order for a PC to connect to and communicate with a Bluetooth device, the
Bluetooth Utility will create a gateway for data to be exchanged between the
respective devices. This gateway is known as a "port" (or "virtual COM port").
Since one virtual COM port will be allocated to each device, trouble-free
communication will still be possible even if several devices are being used.
When you use the Bluetooth Utility, a virtual COM port will be automatically
created on set-up; however, virtual COM ports can be created manually if so
needed.
4.3.1 Clients and servers
When Bluetooth communications are performed, there will always be a
"client/server" relationship between the various devices. A "client" is a device
that sends certain requests to another device, while a "server" is a device that
provides a service on receipt of such requests from another device.
For example, when a PC issues a print command to a wireless printer, the PC
functions as the client, while the printer functions as the server.
When a PDA or other device attempts to receive files located on a PC by means
of file transfer protocol, the PC functions as the server, while the PDA functions
as the client.
Virtual Bluetooth COM ports can be created both for clients and servers.
• Bluetooth virtual COM port for a client
Virtual COM port used when your device is the client, and requests are sent
to another device.
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