Meross MSS210 not working Error: connect EHOSTUNREACH

Describe The Bug: Homebridge not able to comunicate with plugs, errors in console To Reproduce: Just using homebridge to turn on and off plugs Expected behavior: plugs responding to calls from homebridge Logs:

[7/30/2020, 11:51:21] [Enchufe] Failed to POST to the Meross Device MSS210 at 192.168.0.20: Error: connect EHOSTUNREACH 192.168.0.20:80
    at TCPConnectWrap.afterConnect [as oncomplete] (net.js:1141:16) {
  errno: 'EHOSTUNREACH',
  code: 'EHOSTUNREACH',
  syscall: 'connect',
  address: '192.168.0.20',
  port: 80
}
[7/30/2020, 11:51:36] [Enchufe] Failed to POST to the Meross Device MSS210 at 192.168.0.20: Error: connect EHOSTUNREACH 192.168.0.20:80
    at TCPConnectWrap.afterConnect [as oncomplete] (net.js:1141:16) {
  errno: 'EHOSTUNREACH',
  code: 'EHOSTUNREACH',
  syscall: 'connect',
  address: '192.168.0.20',
  port: 80
}
(node:19110) UnhandledPromiseRejectionWarning: TypeError: Cannot read property 'togglex' of undefined
    at Meross.getOnCharacteristicHandler (/usr/lib/node_modules/homebridge-meross/index.js:327:41)
    at processTicksAndRejections (internal/process/task_queues.js:97:5)
(node:19110) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 5)
(node:19110) UnhandledPromiseRejectionWarning: TypeError: Cannot read property 'togglex' of undefined
    at Meross.getOnCharacteristicHandler (/usr/lib/node_modules/homebridge-meross/index.js:327:41)
    at processTicksAndRejections (internal/process/task_queues.js:97:5)
(node:19110) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 6)
(node:19110) UnhandledPromiseRejectionWarning: TypeError: Cannot read property 'togglex' of undefined
    at Meross.getOnCharacteristicHandler (/usr/lib/node_modules/homebridge-meross/index.js:327:41)
    at processTicksAndRejections (internal/process/task_queues.js:97:5)
(node:19110) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 7)
[7/30/2020, 11:53:58] [Enchufe] Failed to POST to the Meross Device MSS210 at 192.168.0.20: Error: connect EHOSTUNREACH 192.168.0.20:80
    at TCPConnectWrap.afterConnect [as oncomplete] (net.js:1141:16) {
  errno: 'EHOSTUNREACH',
  code: 'EHOSTUNREACH',
  syscall: 'connect',
  address: '192.168.0.20',
  port: 80
}

**Homebridge Config:**

{
    "bridge": {
        "name": "Homebridge AA1B",
        "username": "0E:7E:93:4D:AA:1B",
        "port": 51018,
        "pin": "297-43-810"
    },
    "accessories": [
        {
            "model": "MSS210",
            "name": "Impresora 3D",
            "deviceUrl": "192.168.0.116",
            "channel": 0,
            "messageId": "c1779468dca8f744e0842c733b74e28e",
            "timestamp": 1596102034,
            "sign": "27232e3e6b88afe45f3205c72c8e1fd1",
            "accessory": "Meross"
        },
        {
            "model": "MSS210",
            "name": "Enchufe",
            "deviceUrl": "192.168.0.20",
            "channel": 0,
            "messageId": "7e8dd43a668da4cd3c3d5f885421974d",
            "timestamp": 1596102036,
            "sign": "4f60163a5356c80b460d866a8a2a4109",
            "accessory": "Meross"
        }
    ],
    "platforms": [
        {
            "name": "Config",
            "port": 8581,
            "platform": "config"
        }
    ]
}

**Environment:**

* **Node.js Version**: v12.18.3
* **NPM Version**: 6.14.6
* **Homebridge Version**: 1.1.1
* **Homebridge Meross Plugin Version**: homebridge-meross v2.3.1
* **Homebridge Config UI X Plugin Version**: homebridge-config-ui-x v4.24.0
* **Operating System**:  raspbian buster lite

[dirkelko]

While it worked with two of my MSS210 plugs (hardware version 2.0, can be checked in the Meross App), I got the same error with two older MSS210 plugs (identical looking and same label but hardware version 1.0). It works if I select for the older plugs MSS-110-1.0 as Model in the settings. Seems that the MSS210 plug exists also in two versions with the older one being similar to the MSS-110 1.0

[donavanbecker]

See #151