Bluetooth communication through Matlab error

Hello all,

I've started looking at communicating with devices using bluetooth, and have run into a few problems. I've already had a read through Configuring Bluetooth Communications, Transmitting Data Over the Bluetooth Interface and a couple of community questions and not found a solution.

>> instrhwinfo('Bluetooth')

ans = 

          RemoteNames: {'itsmedoug'}
            RemoteIDs: {'btspp://D4206DADA6AA'}
      BluecoveVersion: 'BlueCove-2.1.1-SNAPSHOT'
       JarFileVersion: 'Version 3.2'

So far, so good, but if I try to access the device 'itsmedoug' directly, I get an empty structure:

>> instrhwinfo('Bluetooth', 'itsmedoug')

ans = 

                 RemoteName: []
                   RemoteID: []
      ObjectConstructorName: []
                   Channels: []

Any idea why this should be the case?

If I assume that the channels are indexed from 1, I can open a connection:

>> bt = Bluetooth('itsmedoug', 1)

     Bluetooth Object : Bluetooth-itsmedoug:1

     Communication Settings 
        RemoteName:         itsmedoug
        RemoteID:           btspp://D4206DADA6AA
        Channel:            1
        Terminator:         'LF'

     Communication State 
        Status:             closed
        RecordStatus:       off

     Read/Write State  
        TransferStatus:     idle
        BytesAvailable:     0
        ValuesReceived:     0
        ValuesSent:         0

>> fopen(bt)

Which doesn't return an error (unlike when I use channel 0, 2, 3, etc...) But then when I try to write to the device:

>> fwrite(bt, uint8([2,0,1,155]))
Error using icinterface/fwrite (line 191)
An error occurred during writing

I'm assume this is a manifestation of the same issue, though I'm not sure.

The device is paired in Windows Explorer, and I'm using R2012b.

Any help would be much appreciated.

[Walter Roberson]

On an off chance.. could you try

info = instrhwinfo('Bluetooth');
disp(info.RemoteName{1})
disp(info.RemoteName{1} + 0)

I just want to check that the name does not have any invisible characters in it.

[Doug Kelly]

This returns

>>disp(info.RemoteNames{1}+0)
105 116 115 109 101 100 111 117 103

, presumably as expected. And

>>info = intrhwinfo('Bluetooth');
>>info2 = instrhwinfo('Bluetooth', info.RemoteNames{1})

gives the same empty stucture as before.

[Walter Roberson]

Yes, that does look as expected for a name.

[kalokagatija]

Worked for me, there was one extra zero in the name... Thanks a lot !