I spent quite a bit of time trying to get these working reliably. I finally gave up and am offering a couple of these and one DW2 (Door / Window contact sensor) for free with $10 shipping for all.
Anyway, I had to go back and forth between the app and the browser version to configure it. Only way to get the MQTT settings was via the web. It was sort of hidden in the menu settings. I forget exactly where, as I have removed them from the app and reset them. Sorry I'm not very helpful.
