Bunch of errors at startup
After installing the latest version 0.28.1 at startup the followings appearing, with 0.28.0 everything is fine:
```
[15/12/2022, 14:29:30] [Roborock S5 Max] [Model=unknown] getSerialNumber | No vacuum cleaner is discovered yet.
[15/12/2022, 14:29:30] [Roborock S5 Max] [Model=unknown] getFirmware | No vacuum cleaner is discovered yet.
[15/12/2022, 14:29:30] [Roborock S5 Max] [Model=unknown] getCleaning | Failed getting the cleaning status. Error: Not connected yet
    at DeviceManager.get device [as device] (/usr/local/lib/node_modules/homebridge-xiaomi-roborock-vacuum/src/services/device_manager.ts:86:13)
    at DeviceManager.property (/usr/local/lib/node_modules/homebridge-xiaomi-roborock-vacuum/src/services/device_manager.ts:92:17)
    at DeviceManager.get state [as state] (/usr/local/lib/node_modules/homebridge-xiaomi-roborock-vacuum/src/services/device_manager.ts:73:17)
    at DeviceManager.get isCleaning [as isCleaning] (/usr/local/lib/node_modules/homebridge-xiaomi-roborock-vacuum/src/services/device_manager.ts:77:43)
    at MainService.getCleaning (/usr/local/lib/node_modules/homebridge-xiaomi-roborock-vacuum/src/services/main_service.ts:108:45)
    at On.getHandler (/usr/local/lib/node_modules/homebridge-xiaomi-roborock-vacuum/src/services/main_service.ts:38:25)
    at On.<anonymous> (/usr/local/lib/node_modules/homebridge/node_modules/hap-nodejs/src/lib/Characteristic.ts:2399:32)
    at step (/usr/local/lib/node_modules/homebridge/node_modules/tslib/tslib.js:144:27)
    at Object.next (/usr/local/lib/node_modules/homebridge/node_modules/tslib/tslib.js:125:57)
    at /usr/local/lib/node_modules/homebridge/node_modules/tslib/tslib.js:118:75
    at new Promise (<anonymous>)
    at Object.__awaiter (/usr/local/lib/node_modules/homebridge/node_modules/tslib/tslib.js:114:16)
    at On.Characteristic.handleGetRequest (/usr/local/lib/node_modules/homebridge/node_modules/hap-nodejs/dist/lib/Characteristic.js:736:24)
    at On.<anonymous> (/usr/local/lib/node_modules/homebridge/node_modules/hap-nodejs/src/lib/Characteristic.ts:3076:22)
    at step (/usr/local/lib/node_modules/homebridge/node_modules/tslib/tslib.js:144:27)
    at Object.next (/usr/local/lib/node_modules/homebridge/node_modules/tslib/tslib.js:125:57)
[15/12/2022, 14:29:30] [Roborock S5 Max] [Model=unknown] getSpeed | No vacuum cleaner is discovered yet.
[15/12/2022, 14:29:30] [Roborock S5 Max] [Model=unknown] getCleaningRoom | No vacuum cleaner is discovered yet.
[15/12/2022, 14:29:30] [Roborock S5 Max] [Model=unknown] getCleaningRoom | No vacuum cleaner is discovered yet.
[15/12/2022, 14:29:30] [Roborock S5 Max] [Model=unknown] getCleaningRoom | No vacuum cleaner is discovered yet.
[15/12/2022, 14:29:30] [Roborock S5 Max] [Model=unknown] getCleaningRoom | No vacuum cleaner is discovered yet.
[15/12/2022, 14:29:30] [Roborock S5 Max] [Model=unknown] getCleaningRoom | No vacuum cleaner is discovered yet.
[15/12/2022, 14:29:30] [Roborock S5 Max] [Model=unknown] getCleaningRoom | No vacuum cleaner is discovered yet.
[15/12/2022, 14:29:30] [Roborock S5 Max] [Model=unknown] getPauseState | No vacuum cleaner is discovered yet.
[15/12/2022, 14:29:30] [Roborock S5 Max] [Model=unknown] getCleaning | Failed getting the cleaning status. Error: Not connected yet
    at DeviceManager.get device [as device] (/usr/local/lib/node_modules/homebridge-xiaomi-roborock-vacuum/src/services/device_manager.ts:86:13)
    at DeviceManager.property (/usr/local/lib/node_modules/homebridge-xiaomi-roborock-vacuum/src/services/device_manager.ts:92:17)
    at DeviceManager.get state [as state] (/usr/local/lib/node_modules/homebridge-xiaomi-roborock-vacuum/src/services/device_manager.ts:73:17)
    at DeviceManager.get isCleaning [as isCleaning] (/usr/local/lib/node_modules/homebridge-xiaomi-roborock-vacuum/src/services/device_manager.ts:77:43)
    at MainService.getCleaning (/usr/local/lib/node_modules/homebridge-xiaomi-roborock-vacuum/src/services/main_service.ts:108:45)
    at On.getHandler (/usr/local/lib/node_modules/homebridge-xiaomi-roborock-vacuum/src/services/zones_service.ts:63:37)
    at On.<anonymous> (/usr/local/lib/node_modules/homebridge/node_modules/hap-nodejs/src/lib/Characteristic.ts:2399:32)
    at step (/usr/local/lib/node_modules/homebridge/node_modules/tslib/tslib.js:144:27)
    at Object.next (/usr/local/lib/node_modules/homebridge/node_modules/tslib/tslib.js:125:57)
    at /usr/local/lib/node_modules/homebridge/node_modules/tslib/tslib.js:118:75
    at new Promise (<anonymous>)
    at Object.__awaiter (/usr/local/lib/node_modules/homebridge/node_modules/tslib/tslib.js:114:16)
    at On.Characteristic.handleGetRequest (/usr/local/lib/node_modules/homebridge/node_modules/hap-nodejs/dist/lib/Characteristic.js:736:24)
    at On.<anonymous> (/usr/local/lib/node_modules/homebridge/node_modules/hap-nodejs/src/lib/Characteristic.ts:3076:22)
    at step (/usr/local/lib/node_modules/homebridge/node_modules/tslib/tslib.js:144:27)
    at Object.next (/usr/local/lib/node_modules/homebridge/node_modules/tslib/tslib.js:125:57)
[15/12/2022, 14:29:30] [homebridge-xiaomi-roborock-vacuum] This plugin threw an error from the characteristic 'On': Unhandled error thrown inside read handler for characteristic: Not connected yet. See https://homebridge.io/w/JtMGR for more info.
[15/12/2022, 14:29:30] [homebridge-xiaomi-roborock-vacuum] This plugin threw an error from the characteristic 'Status Low Battery': Unhandled error thrown inside read handler for characteristic: Not connected yet. See https://homebridge.io/w/JtMGR for more info.
[15/12/2022, 14:29:30] [homebridge-xiaomi-roborock-vacuum] This plugin threw an error from the characteristic 'Battery Level': Unhandled error thrown inside read handler for characteristic: Not connected yet. See https://homebridge.io/w/JtMGR for more info.
[15/12/2022, 14:29:30] [homebridge-xiaomi-roborock-vacuum] This plugin threw an error from the characteristic 'Charging State': Unhandled error thrown inside read handler for characteristic: Not connected yet. See https://homebridge.io/w/JtMGR for more info.
[15/12/2022, 14:29:30] [homebridge-xiaomi-roborock-vacuum] This plugin threw an error from the characteristic 'On': Unhandled error thrown inside read handler for characteristic: Not connected yet. See https://homebridge.io/w/JtMGR for more info.
[15/12/2022, 14:29:30] [homebridge-xiaomi-roborock-vacuum] This plugin threw an error from the characteristic 'Filter Change Indication': Unhandled error thrown inside read handler for characteristic: Not connected yet. See https://homebridge.io/w/JtMGR for more info.
[15/12/2022, 14:29:30] [homebridge-xiaomi-roborock-vacuum] This plugin threw an error from the characteristic 'Filter Life Level': Unhandled error thrown inside read handler for characteristic: Not connected yet. See https://homebridge.io/w/JtMGR for more info.
[15/12/2022, 14:29:30] [homebridge-xiaomi-roborock-vacuum] This plugin threw an error from the characteristic 'Filter Change Indication': Unhandled error thrown inside read handler for characteristic: Not connected yet. See https://homebridge.io/w/JtMGR for more info.
[15/12/2022, 14:29:30] [homebridge-xiaomi-roborock-vacuum] This plugin threw an error from the characteristic 'Filter Life Level': Unhandled error thrown inside read handler for characteristic: Not connected yet. See https://homebridge.io/w/JtMGR for more info.
[15/12/2022, 14:29:30] [homebridge-xiaomi-roborock-vacuum] This plugin threw an error from the characteristic 'Filter Change Indication': Unhandled error thrown inside read handler for characteristic: Not connected yet. See https://homebridge.io/w/JtMGR for more info.
[15/12/2022, 14:29:30] [homebridge-xiaomi-roborock-vacuum] This plugin threw an error from the characteristic 'Filter Life Level': Unhandled error thrown inside read handler for characteristic: Not connected yet. See https://homebridge.io/w/JtMGR for more info.
[15/12/2022, 14:29:30] [homebridge-xiaomi-roborock-vacuum] This plugin threw an error from the characteristic 'Filter Change Indication': Unhandled error thrown inside read handler for characteristic: Not connected yet. See https://homebridge.io/w/JtMGR for more info.
[15/12/2022, 14:29:30] [homebridge-xiaomi-roborock-vacuum] This plugin threw an error from the characteristic 'Filter Life Level': Unhandled error thrown inside read handler for characteristic: Not connected yet. See https://homebridge.io/w/JtMGR for more info.
[15/12/2022, 14:29:30] [homebridge-xiaomi-roborock-vacuum] This plugin threw an error from the characteristic 'Filter Change Indication': Unhandled error thrown inside read handler for characteristic: Not connected yet. See https://homebridge.io/w/JtMGR for more info.
[15/12/2022, 14:29:30] [homebridge-xiaomi-roborock-vacuum] This plugin threw an error from the characteristic 'Filter Life Level': Unhandled error thrown inside read handler for characteristic: Not connected yet. See https://homebridge.io/w/JtMGR for more info.
```