ESP32 WiFi Library – WiFi.reconnect

/*
 * Author: Avant Maker
 * Date: February 7, 2025
 * Version: 1.0
 * Description: This example code demonstrates how to use the reconnect
 * method to re-establish the ESP32's WiFi connection if it gets disconnected.
 *
 * License: MIT 
 *
 * Code Source:
 * This example code is sourced from the Comprehensive Guide
 * to the ESP32 Arduino Core Library, accessible on AvantMaker.com.
 * For additional code examples and in-depth documentation related to
 * the ESP32 Arduino Core Library, please visit:
 *
 * https://avantmaker.com/home/all-about-esp32-arduino-core-library/
 *
 * AvantMaker.com, your premier destination for all things
 * DIY, AI, IoT, Smart Home, and STEM projects. We are dedicated
 * to empowering makers, learners, and enthusiasts with
 * the resources they need to bring their nnovative ideas to life.
 */

#include <WiFi.h>  // Include the ESP32 WiFi library

// Define the WiFi credentials
const char* ssid = "your_SSID";  // Replace with your WiFi network's SSID
const char* password = "your_PASSWORD";  // Replace with your WiFi network's password

void setup() {
  // Initialize Serial communication for debugging
  Serial.begin(115200);
  
  // Start connecting to the WiFi network using SSID and password
  Serial.println("Connecting to WiFi...");
  WiFi.begin(ssid, password);

  // Wait until connected
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);  // Wait for 1 second
    Serial.println("Attempting to connect...");
  }
  
  // Once connected, print the IP address
  Serial.println("WiFi connected!");
  Serial.print("IP Address: ");
  Serial.println(WiFi.localIP());  // Print the local IP address assigned to the ESP32
  
  // Simulate a WiFi disconnection after 2 seconds
  delay(2000);
  Serial.println("Disconnecting from WiFi...");
  
  // Disconnect from the WiFi network
  WiFi.disconnect();
  Serial.println("WiFi disconnected.");
  
  // Wait for 5 seconds before reconnecting
  delay(5000);
  
  // Attempt to reconnect to the WiFi network
  Serial.println("Attempting to reconnect to WiFi...");
  WiFi.reconnect();  // This will attempt to reconnect to the last connected WiFi network
  
  // Wait until reconnected
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);  // Wait for 1 second
    Serial.println("Attempting to reconnect...");
  }
  
  // Once reconnected, print the new IP address
  Serial.println("WiFi reconnected!");
  Serial.print("IP Address: ");
  Serial.println(WiFi.localIP());  // Print the local IP address assigned to the ESP32
}

void loop() {
  // Main loop does nothing in this example, but you can add your own code here
}