 Constant "This plugin generated a warning from the characteristic......" error.
<!-- Constant "This plugin generated a warning from the characteristic......" error -->

### Current Behavior
[4/25/2021, 6:40:32 PM] [homebridge-hs100] This plugin generated a warning from the characteristic 'Volts': characteristic value expected valid finite number and received "NaN" (number). See https://git.io/JtMGR for more info.

### Configuration
<!-- Please include the TplinkSmarthome platform section of your config.json file.
Paste between the the two ``` lines below.
-->
```json

{
            "platform": "Hs100",
            "name": "TplinkSmarthome"
        },

```

```
