Android Question B4A Bluetooth Pairing to Invisible device

[jobykpaul]

Is it possible to connect an unpaired invisible Bluetooth device, by using its MAC address?. The user know the MAC address of Bluetooth device, but the device are in invisible and unpaired to app installed phone.
Have seen few Bluetooth application and found that the user can search the Bluetooth device and connect to it. Any help is appreciated.

 

[Erel]

Yes. You just need to call Serial.Connect with the Mac address. If pairing is required then the system will show the pairing dialog.

 

[jobykpaul]

Thank you, Then how do we enter the pairing password in Serial.Connect. ?
I found this line from the example code.
Dim device As NameAndMac = Starter.Manager.foundDevices.Get(Index)
Starter.Manager.ConnectTo(device)
Thank you

 

[DonManfred]

Then how do we enter the pairing password in Serial.Connect. ?

The Device user must Enter it.
It can not be done programatically.

 

[jobykpaul]

Thank You for your reply,
When the app try to connect to the Bluetooth phone , the error displayed "Error connecting:java.io.IOexpecption:read failed, socket might closed or timeout, readret: -1"

 

[Erel]

This means that the other device is no listening for SPP connections, at least not on the default UUID address.

 

[jobykpaul]

I did the following , First i installed the app on my Phone(Bluetooth Example) you provided, and then click the "search for devices" button , and found my PC , then try to connect it and got the above error.

How to make listening SPP connection in my PC or another phone ?

 

[Erel]

and found my PC , then try to connect it and got the above error.

This is expected. Your PC doesn't listen for incoming connections.

The simplest way to test it is with two Android devices. If you don't have a second device then you can create a virtual serial port mapped to your Bluetooth adapter and then use this program to test it: https://www.b4x.com/android/forum/threads/jserial-library.34762/#content

 

[jobykpaul]

It worked