Data binding in custom management command

I start work with django channels. I need bind data of my model Device. I do it. When I change Device object in admin interface I get message about changing on client (web browser) but I also run simple custom django management command. And when Device-object has been changed in custom command process I don't receive any message on client. How I can fix it?

my problem on stackoverflow:

http://stackoverflow.com/questions/40995897/databinding-with-django-channels-in-custom-command

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