Plug-in is sending RGB code to MSL100
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**Describe The Bug:**

Whilst there is no requirement for an RGB setting with the MSL100 the plugin is trying to send a code and in Hoobs V4 there is a widget to select the colour present

**To Reproduce:**

Just add the MSL to the Plug-in 

**Expected behavior:**

No requirement for RGB selection just for dimming and on/off

**Logs:**


[log.txt](https://github.com/homebridge-plugins/homebridge-meross/files/6811015/log.txt)


```
Show the Homebridge logs here. If using Homebridge Config-UI-X, you can easly downlaod your log by visiting the log page on the UI and Clicking the Download Icon in the top right.
Remove any sensitive information, such as yourhomebridge-meross timestamp / sign / messageId / deviceUrl.

Please Turn on Debug Mode before submitting your Issue so more logs can be shared to fix the issue being submitted.

***Read and Paste over this Text the Text Above^^^^^^
```

**Homebridge Config:**

```json


    "accessories": [],
    "platforms": [
        {
            "platform": "Meross",
            "name": "Meross",
            "devices": [
                {
                    "name": "Bedroom Main",
                    "model": "MSL-100",
                    "firmwareRevision": "3.1.1",
                    "deviceUrl": "192.168.i.j",
                    "messageId": "378",
                    "timestamp": 817,
                    "sign": "e25"
                },
                {
                    "name": "Stairs",
                    "model": "MSL-100",
                    "firmwareRevision": "3.1.1",
                    "deviceUrl": "192.168.g.h",
                    "messageId": "f2b",
                    "timestamp": 43,
                    "sign": "a5f"
                },
                {
                    "name": "Living Side Lamp",
                    "model": "MSS420F",
                    "firmwareRevision": "3.1.1",
                    "deviceUrl": "192.168.e.f",
                    "channel": 1,
                    "messageId": "4e7",
                    "timestamp": 25,
                    "sign": "6442"
                },
                {
                    "name": "Living Turntable",
                    "model": "MSS420F",
                    "firmwareRevision": "3.1.1",
                    "deviceUrl": "192.168.c.d",
                    "channel": 2,
                    "messageId": "539",
                    "timestamp": 814,
                    "sign": "e6d"
                },
                {
                    "name": "Living Hoover",
                    "model": "MSS420F",
                    "firmwareRevision": "3.1.1",
                    "deviceUrl": "192.168.2.38",
                    "channel": 3,
                    "messageId": "78a",
                    "timestamp": 1455,
                    "sign": "2117"
                },
                {
                    "name": "Living Spare",
                    "model": "MSS420F",
                    "firmwareRevision": "3.1.1",
                    "deviceUrl": "192.168.a.b",
                    "channel": 4,
                    "messageId": "9e",
                    "timestamp": 51,
                    "sign": "e4"
                },
                {
                    "name": "Mower",
                    "model": "MSS620",
                    "firmwareRevision": "3.1.7",
                    "deviceUrl": "192.168.k.l",
                    "channel": 1,
                    "messageId": "0f9",
                    "timestamp": 554,
                    "sign": "e7c"
                },
                {
                    "name": "Drill",
                    "model": "MSS620",
                    "firmwareRevision": "3.1.7",
                    "deviceUrl": "192.168.x.y",
                    "channel": 2,
                    "messageId": "5ab",
                    "timestamp": y,
                    "sign": "x"
                }
            ]
        }
    ]
}

```

**Screenshots:**

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# **Environment:**

- **Node.js Version**: 14.17.2
- **NPM Version**: 5.0.3
- **Hoobs Version**: 4.0.80
- **Homebridge Meross Plugin Version**: 5.0.3
- **Homebridge Config UI X Plugin Version**:
- **Operating System**: <!-- Raspbian / Ubuntu / Debian / Windows / macOS / Docker -->

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