hcitool lescan does not work anymore after plugin installation
<!-- Provide a general summary in the Title above -->

### Expected Behavior

`hcitool lescan` command normally starts scanning process and gives list of discovered BLE devices

### Current Behavior

After plugin installation and configuration `hcitool lescan` command returns back an error:

`raspberrypi:/home/pi# hcitool lescan`
_Set scan parameters failed: Input/output error_

If plugin configuration is deleted from config and home bridge restarted, `hcitool lescan` behavior is back to normal

### Steps to Reproduce (for bugs)
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### Versions
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- **homebridge**: `1.1.0`
- **homebridge-mi-hygrothermograph**: `homebridge-mi-hygrothermograph@3.0.1`
- **node**:       `v12.14.1`
- **OS**:         `raspberrypi 4.19.118-v7l`

### Configuration
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 -->
```json

```

### Homebridge Log / Command Output
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-->
```

```
