====== captive_portal.json file ======
  * Edit the file ///etc/MESHdesk/configs/captive_config.json//.
  * This file is a JSON structure that the device uses as a reference to configure itself with a special captive portal when it is not yet managed by the controller.
  * There are only two items that might need to be tweaked
        * The radio number for the 2.4G band.
        * The **ports** for the **br-lan** device (We use the WAN port in out implementation)
  * With the **Xiaomi 4A 100M Edition** radio0 is the 2.4G radio so no need to tweak that item. (If the hardware has radio1 as the 2.4G band simply look for all the references to **radio0** and make them radio1)
  * See this snippet of a device which has radio1 using the 2.4G band
<code javascript>
"wireless": [
            {
                "wifi-device": "radio1",
                "options": {
                    "channel": 1,
                    "disabled": 0,
                    "hwmode": "11g",
                    "htmode": "HT20"
                }
            },  
            {
                "wifi-iface": "two",
                "options": {
                    "device": "radio1",
                    "ifname": "two0",
                    "mode": "ap",
                    "network": "ex_two",
                    "encryption": "none",
                    "ssid": "_Replace_",
                    "key": "",
                    "hidden": false,
                    "isolate": false,
                    "auth_server": "",
                    "auth_secret": ""
                }
            },
            {
                "wifi-iface": "web_by_w",
                "options": {
                    "device": "radio1",
                    "mode": "sta",
                    "network": "web_by_w",
                    "encryption": "psk2",
                    "key": "radiusdesk",
                    "ssid": "meshdesk_config",
                    "disabled": "1"
                }
            }
        ],
</code>
  * With the **Xiaomi 4A 100M Edition** the **port** we use is **eth0.1** for the **br-lan** device definition.
<code javascript>
{
    "device": "br-lan",
    "options": {
        "name": "br-lan",
        "type": "bridge"
    },
    "lists": {
        "ports": [
            "eth0.1"
        ]
    }
},  
</code>
  * With the **Xiaomi 4A Gigabit Edition** it will look like this
<code javascript>
{
    "device": "br-lan",
    "options": {
        "name": "br-lan",
        "type": "bridge"
    },
    "lists": {
        "ports": [
            "wan"
        ]
    }
},  
</code>
  * Once the tweaks are completed we can test everything out.