arduino-esp32/libraries/WiFi/examples/WiFiClientEvents/WiFiClientEvents.ino

/*
 *  This sketch shows the WiFi event usage
 *
 */

#include <WiFi.h>

const char* ssid     = "your-ssid";
const char* password = "your-password";


void WiFiEvent(WiFiEvent_t event)
{
    Serial.printf("[WiFi-event] event: %d\n", event);

    switch(event) {
    case WIFI_EVENT_STAMODE_GOT_IP:
        Serial.println("WiFi connected");
        Serial.println("IP address: ");
        Serial.println(WiFi.localIP());
        break;
    case WIFI_EVENT_STAMODE_DISCONNECTED:
        Serial.println("WiFi lost connection");
        break;
    }
}

void setup()
{
    Serial.begin(115200);

    // delete old config
    WiFi.disconnect(true);

    delay(1000);

    WiFi.onEvent(WiFiEvent);

    WiFi.begin(ssid, password);

    Serial.println();
    Serial.println();
    Serial.println("Wait for WiFi... ");
}


void loop()
{
    delay(1000);
}