return empty when I enter “”instrhwi​nfo('Bluet​ooth','Hph​one')“”

>> a = instrhwinfo('Bluetooth')

a =

        RemoteNames: {'Hphone'}
          RemoteIDs: {'btspp://087A4C001CFC'}
    BluecoveVersion: 'BlueCove-2.1.1-SNAPSHOT'
     JarFileVersion: 'Version 3.2'

>> instrhwinfo('Bluetooth','Hphone')

ans =

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

Answer 1

[HDying]

thx everybody, I think I find the reason. that is the device is cellphone. the key is it can't run the SPP profile. Look this for details. : http://www.mathworks.com/matlabcentral/answers/98837

Answer 2

[Vinod]

In this case this was because the phone did not support Bluetooth Serial Port Profile.

Note that this may also have to do with the device going into a power save mode and not being discoverable. If you are sure the device supports Bluetooth SPP, try power cycling your device and then executing

>>instrhwinfo('bluetooth','_myDevice_')

Note that the information returned is frequently usable even if the device is in power save mode, so you only potentially need this information once.