Arduino example script to test ESP32 WiFi connectivity. Meant to quickly test routers' connectivity

esp32-wifi.ino

#include <WiFi.h>
#include <HTTPClient.h>  // Add HTTP client library

const char *ssid = "<YOUR_SSID>";
const char *password = "<YOUR_PASSWORD>";
int btnGPIO = 0;
int btnState = false;

// Function to test internet connectivity
bool testInternetConnection() {
    HTTPClient http;
    
    // Try to connect to Google's homepage
    http.begin("http://www.google.com");
    int httpCode = http.GET();
    
    Serial.print("[HTTP] Testing internet connectivity... ");
    
    if (httpCode > 0) {
        Serial.println("CONNECTED");
        Serial.printf("[HTTP] Status code: %d\n", httpCode);
        http.end();
        return true;
    } else {
        Serial.println("FAILED");
        Serial.printf("[HTTP] Error: %s\n", http.errorToString(httpCode).c_str());
        http.end();
        return false;
    }
}

void setup() {
    Serial.begin(115200);
    delay(10);
    
    pinMode(btnGPIO, INPUT);
    
    Serial.println();
    Serial.print("[WiFi] Connecting to ");
    Serial.println(ssid);
    
    WiFi.begin(ssid, password);
    
    int tryDelay = 500;
    int numberOfTries = 20;
    
    while (true) {
        switch (WiFi.status()) {
            case WL_NO_SSID_AVAIL:
                Serial.println("[WiFi] SSID not found");
                break;
            case WL_CONNECT_FAILED:
                Serial.print("[WiFi] Failed - WiFi not connected! Reason: ");
                return;
                break;
            case WL_CONNECTION_LOST:
                Serial.println("[WiFi] Connection was lost");
                break;
            case WL_SCAN_COMPLETED:
                Serial.println("[WiFi] Scan is completed");
                break;
            case WL_DISCONNECTED:
                Serial.println("[WiFi] WiFi is disconnected");
                break;
            case WL_CONNECTED:
                Serial.println("[WiFi] WiFi is connected!");
                Serial.print("[WiFi] IP address: ");
                Serial.println(WiFi.localIP());
                
                // Test internet connectivity once connected
                testInternetConnection();
                return;
                break;
            default:
                Serial.print("[WiFi] WiFi Status: ");
                Serial.println(WiFi.status());
                break;
        }
        
        delay(tryDelay);
        if (numberOfTries <= 0) {
            Serial.print("[WiFi] Failed to connect to WiFi!");
            WiFi.disconnect();
            return;
        } else {
            numberOfTries--;
        }
    }
}

void loop() {
    btnState = digitalRead(btnGPIO);
    if (btnState == LOW) {
        Serial.println("[WiFi] Disconnecting from WiFi!");
        if (WiFi.disconnect(true, false)) {
            Serial.println("[WiFi] Disconnected from WiFi!");
        }
        delay(1000);
    }
}