What is "Connected Client Count" on Azure IoT Edge dashboard

I need to know how to get "Connected Client Count" from API rest or go SDK, but I did not find any reference of what does it really means. From where "Connected Client Count" comes?

My guess: The "Connected Client Count" is calculating doing the following:

Get the device list from API.
For one of these devices get the modules from API
Now it could return many modules depending on your architecture, so in my case it will ignores agent and hub modules, considering just other nodeRed modules as a real client. If the client (nodeRed module) connectionStatus == connected so this is a valid client connect and should return +1.

I would be very glad for an explanation of this or some doc references.

Solution

The "Connected Client Count" that you find in the Azure Portal reflects the amount of modules and/or devices that are currently connected to your edgeHub. It gets these values from the reported properties in the Module Twin of your edgeHub module. If you take a look in the Module Twin you will find something similar to this in the reported properties:

"reported": {
      "schemaVersion": "1.0",
      "version": {
        "version": "1.0.10.1",
        "build": "36502453",
        "commit": "3b3dfcc099921bc2e4632105b49df551b1c5211c0"
      },
      "lastDesiredVersion": 39,
      "lastDesiredStatus": {
        "code": 200,
        "description": ""
      },
      "clients": {
        "device-name/SomeModule": {
          "status": "Connected",
          "lastConnectedTimeUtc": "2020-11-26T10:10:17.6134347Z"
        },
        "device-name/SomeOtherModule": {
          "status": "Connected",
          "lastConnectedTimeUtc": "2020-11-26T10:10:17.6278367Z"
        }
      },

You can find out more on the reported properties of this module here