shelly dimmer not discoverable [Bug] 
I'm using homebridge under hoobs environment and I'm testing it with a shelly dimmer trying to get it working, but nothing to to do, despite countless trials. I couldn't associate the device shelly dimmer in home-bridge. 
The hub and the device work under the same network and the same subnet. 

I will report below the most relevant information about my configuration.
Can you help me to find out where I'm wrong and how I can fix this issue.
Many thanks in advance to the community.

Mario

**config**
{
    "platform": "Shelly",
    "name": "Shelly",
    "username": "myuser_shellycloud",
    "password": "mypw_shellycloud",
    "devices": [
        {
            "id": "D47558",
            "name": "shellydimmer"
        },
        {
            "id": "D47558",
            "type": "SHDM-1"
        }
    ],
    "admin": {
        "enabled": true,
        "port": 8181
    }
}

**Log output**
homebridge-shelly describe 192.168.1.19
Type: SHDM-1
CoAP description: {"blk":[{"I":1,"D":"light_0"},{"I":2,"D":"input_0"},{"I":3,"D":"input_1"},{"I":4,"D":"device"}],"sen":[{"I":9103,"T":"EVC","D":"cfgChanged","R":"U16","L":4},{"I":1101,"T":"S","D":"output","R":"0/1","L":1},{"I":5101,"T":"S","D":"brightness","R":"1/100","L":1},{"I":2101,"T":"S","D":"input","R":"0/1","L":2},{"I":2102,"T":"EV","D":"inputEvent","R":["S/L",""],"L":2},{"I":2103,"T":"EVC","D":"inputEventCnt","R":"U16","L":2},{"I":2201,"T":"S","D":"input","R":"0/1","L":3},{"I":2202,"T":"EV","D":"inputEvent","R":["S/L",""],"L":3},{"I":2203,"T":"EVC","D":"inputEventCnt","R":"U16","L":3},{"I":4101,"T":"P","D":"power","U":"W","R":["0/230","-1"],"L":1},{"I":4103,"T":"E","D":"energy","U":"Wmin","R":["U32","-1"],"L":1},{"I":6102,"T":"A","D":"overpower","R":["0/1","-1"],"L":1},{"I":6104,"T":"A","D":"loadError","R":"0/1","L":1},{"I":3104,"T":"T","D":"deviceTemp","U":"C","R":["-40/300","999"],"L":4},{"I":3105,"T":"T","D":"deviceTemp","U":"F","R":["-40/572","999"],"L":4},{"I":6101,"T":"A","D":"overtemp","R":["0/1","-1"],"L":4},{"I":9101,"T":"S","D":"mode","R":"color/white","L":4}]}
CoAP status: {"G":[[0,9103,2],[0,1101,0],[0,5101,89],[0,2101,0],[0,2102,""],[0,2103,0],[0,2201,0],[0,2202,""],[0,2203,0],[0,4101,0],[0,4103,0],[0,6102,0],[0,6104,0],[0,3104,49.93],[0,3105,121.88],[0,6101,0],[0,9101,"white"]]}
HTTP Settings:: {"device":{"type":"SHDM-1","mac":"F4CFA2D47558","hostname":"shellydimmer-D47558","num_outputs":1,"num_meters":1},"wifi_ap":{"enabled":false,"ssid":"shellydimmer-D47558","key":""},"wifi_sta":{"enabled":true,"ssid":"Vodafone_Federico_Wi-fi","ipv4_method":"dhcp","ip":null,"gw":null,"mask":null,"dns":null},"wifi_sta1":{"enabled":false,"ssid":null,"ipv4_method":"dhcp","ip":null,"gw":null,"mask":null,"dns":null},"mqtt":{"enable":false,"server":"192.168.33.3:1883","user":"","id":"shellydimmer-D47558","reconnect_timeout_max":60,"reconnect_timeout_min":2,"clean_session":true,"keep_alive":60,"max_qos":0,"retain":false,"update_period":30},"coiot":{"update_period":15},"sntp":{"server":"time.google.com","enabled":true},"login":{"enabled":false,"unprotected":false,"username":"admin"},"pin_code":"Kw&GWJ","name":null,"fw":"20200904-094531/v1.8.4@699b08ac","factory_reset_from_switch":true,"discoverable":false,"build_info":{"build_id":"20200904-094531/v1.8.4@699b08ac","build_timestamp":"2020-09-04T09:45:31Z","build_version":"1.0"},"cloud":{"enabled":true,"connected":true},"timezone":"Europe/Rome","lat":45.459599,"lng":7.87453,"tzautodetect":true,"tz_utc_offset":7200,"tz_dst":false,"tz_dst_auto":true,"time":"09:05","unixtime":1600679105,"led_status_disable":false,"actions":{"active":false,"names":["btn1_on_url","btn1_off_url","btn1_longpush_url","btn1_shortpush_url","btn2_on_url","btn2_off_url","btn2_longpush_url","btn2_shortpush_url","out_on_url","out_off_url"]},"hwinfo":{"hw_revision":"dev-prototype","batch_id":0},"mode":"white","pulse_mode":2,"calibrated":true,"transition":500,"fade_rate":3,"min_brightness":0,"zcross_debounce":100,"lights":[{"name":"","ison":false,"default_state":"off","auto_on":0,"auto_off":0,"btn1_on_url":"","btn1_off_url":"","btn1_longpush_url":"","btn1_shortpush_url":"","btn2_on_url":"","btn2_off_url":"","btn2_longpush_url":"","btn2_shortpush_url":"","out_on_url":"","out_off_url":"","schedule":false,"schedule_rules":[],"btn_type":"edge","btn_debounce":80,"swap_inputs":0}],"night_mode":{"enabled":false,"start_time":"00:00","end_time":"00:00","brightness":0},"warm_up":{"enabled":0,"brightness":100,"time":50}}
HTTP Status:: {"wifi_sta":{"connected":true,"ssid":"Vodafone_Federico_Wi-fi","ip":"192.168.1.19","rssi":-87},"cloud":{"enabled":true,"connected":true},"mqtt":{"connected":false},"time":"09:05","unixtime":1600679106,"serial":78,"has_update":false,"mac":"F4CFA2D47558","cfg_changed_cnt":2,"actions_stats":{"skipped":0},"lights":[{"ison":false,"has_timer":false,"timer_started":0,"timer_duration":0,"timer_remaining":0,"mode":"white","brightness":89}],"meters":[{"power":0,"is_valid":true,"timestamp":1600679106,"counters":[0.003,0.001,0.008],"total":0}],"inputs":[{"input":0,"event":"","event_cnt":0},{"input":0,"event":"","event_cnt":0}],"tmp":{"tC":49.93,"tF":121.88,"is_valid":true},"calib_progress":0,"overtemperature":false,"loaderror":false,"overload":false,"update":{"status":"idle","has_update":false,"new_version":"20200904-094531/v1.8.4@699b08ac","old_version":"20200904-094531/v1.8.4@699b08ac"},"ram_total":49312,"ram_free":37004,"fs_size":233681,"fs_free":124998,"uptime":4211}

**Environment:**
 - Shelly device(s): shelly dimmer-1 FW version: 20200904-094531/v1.8.4@699b08ac (last update)
 - Plugin version: Shelly 0.15.5 published 9/12/2020 under hoobs
 - Device running homebridge: [ Raspberry Pi]
