fix(wifi): fixes WiFi.isconnected() to return true when it is connected and it has an IP Addr

[SuGlider]

Description of Change

After 3.0.x (including 3.1.x) the function WiFiSTAClass::isConnected() returns when it is connected to the WiFi AP but not necessarily when it has an IP address.
This is a breaking change because 2.0.x only returns true when both, it is connected and it has an IP.

This PR fixes it.

Tests scenarios

#include <Arduino.h>
#include <WiFi.h>

const char *SSID = "xxx";
const char *PSK = "xxx";

void setup()
{
    Serial.begin(115200);
    while (!Serial)
        delay(10);

    Serial.println("connecting..");

    WiFi.begin(SSID, PSK);

    while (!WiFi.isConnected())
        delay(10);

    Serial.println(WiFi.localIP());
}

void loop()
{
    delay(1000);
    Serial.println(WiFi.localIP());
}

Related links

Fix #10580

[github-actions]

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[github-actions]

Test Results

 56 files   56 suites   4m 14s ⏱️
 21 tests  21 ✅ 0 💤 0 ❌
134 runs  134 ✅ 0 💤 0 ❌

Results for commit 877d497.

♻️ This comment has been updated with latest results.

[me-no-dev]

just STA.hasIP() is enough here. You can not have IP if you are not connected.

[SuGlider]

Even if it is configured as static IP?

[me-no-dev]

you are correct. hasIP() checks if either IP has been assigned or that it has static. Since even when static GOT_IP event is received, maybe worth changing there too. Not sure what is more correct for gotIP(), but we can discuss that later.

[beta-tester]

i have a question.
how is or was the logic for WiFi.status() ?

if (WiFi.status() == WL_CONNECTED) {
}

does WL_CONNECTED mean connected and got an IP as well?