Bluetooth to PC: Device, port & UUID

Question

I'm working on an app on Android that is supposed to connect to a custom device via Bluetooth, but in order to emulate that device (which I don't have yet), I made a simulator on PC, using Java's Bluecove.

However, I'm having a hard time figuring out the different connection's method.

First, on Android, we discover the device (here, a PC), then:

-We have the "UUID" solution, as explain in android sdk doc .

-Or the "Port" solution, as proposed here .

The second one seems more natural to me, as I don't quite understand what is a UUID in this scenario.

I do understand that we need to connect to a port of a device, but what does the UUID have to do with that? Why don't we need to specify it in the second solution?

If someone could give me a clue, that would be greatly appreciated :)

Answer 1

蓝牙通信是与服务的通信，因此当您想连接到设备时，您正在尝试连接到服务，而uuid是我们用来连接服务的号码，例如，我要这个uuid（该服务）。