[Support] 
**Describe your problem**
Shelly "dimmer 2" is not discoverable

**Describe what you have tried so far**
everything... nothing works with playing with the settings in the plugin.
tried clicking on "make device discoverable" in the web interface of shelly, but it didn't work as well.

**Environment:**
 - Shelly device(s): [Dimmer2]
 - Plugin version: [homebridge-shelly v0.15.7]
 - Device running homebridge: [Raspberry Pi]
