My garadget also stopped sending notifications also to my phone a few days ago. It was ok initially since I'm still getting IFTTT applet notification. But it stopped working with IFTTT as well today.
I tried the things I see in the forums.
- Reset using 'R'
- logging out of the the app
- un-installing the app
- toggling alerts on the app and also the on the cloud service
- long-pressing the 'M' button to repeat the wi-fi setup
But nothing works.