[Bug]: 8/6/2023, 1:50:54 PMEufy Security BridgeERROR[Doorbell] Snapshot request handler provided empty image buffer! 8/6/2023, 1:51:01 PMEufy Security BridgeERROR[Eufy Security Bridge CC45@Front Door@@Battery Level] characteristic value expected valid finite number and received "undefined" (undefined)
### What happened?

A bug happened!

### Device Type

Doorbell (Supported)

### Plugin Version

v2.0.x (Supported)

### HomeBridge Version

v1.4.x (Supported)

### NodeJS Version

v12 (Supported)

### Operating System

Raspbian 10+ (Supported)

### Relevant log output

```shell
8/6/2023, 1:50:54 PMEufy Security BridgeERROR[Doorbell] Snapshot request handler provided empty image buffer!
8/6/2023, 1:51:01 PMEufy Security BridgeERROR[Eufy Security Bridge CC45@Front Door@@Battery Level] characteristic value expected valid finite number and received "undefined" (undefined)
```


### config

```shell
8/6/2023, 1:50:54 PMEufy Security BridgeERROR[Doorbell] Snapshot request handler provided empty image buffer!
8/6/2023, 1:51:01 PMEufy Security BridgeERROR[Eufy Security Bridge CC45@Front Door@@Battery Level] characteristic value expected valid finite number and received "undefined" (undefined)
```
