Control dimmer item through voice command in habpanel

Hello ,

I have recently done test with voice based command control for switch item, like when a person say " turn on item name" . it will recognize the command like " turn on switch" and also that item getting updating at user interface.
But when I try to control dimmer item through voice command , it will not updating at user interface side.
Don’t know what type of voice command could be used for controlling dimmer item.
What type of voice command we should use to control dimmer item. If any one knows the voice command,
please let me help…

Thanks and Regards,