ESP32 WiFi Library – WiFi.dnsIP

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Description

The dnsIP method retrieves the IP address of the DNS server configured for the ESP32. This method is useful for network configuration and troubleshooting.


Syntax and Usage

This method returns the IP address of the DNS server configured for the ESP32.

WiFi.dnsIP();

Argument(s)

This method does not accept any argument.


Return Value

The dnsIP method returns an IPAddress object that contains the IP address of the DNS server configured for the ESP32. If the ESP32 is not connected to a Wi-Fi network, this method will return 0.0.0.0.


Example Codes

Retrieve and print the DNS server IP address

This code demonstrates how to use the ESP32 WiFi Library’s dnsIP() method to retrieve the IP address of the DNS server used by the currently connected WiFi network. The DNS server is responsible for translating domain names into IP addresses, enabling the ESP32 to access websites and services over the internet. After connecting to the network, the code fetches and prints the DNS server’s IP address using WiFi.dnsIP().

To use this code, replace “your_SSID” and “your_PASSWORD” with your WiFi network’s SSID and password. Upload the code to your ESP32 board and open the Serial Monitor at 115200 baud. The code will connect to the WiFi network and display the DNS server’s IP address. Ensure the ESP32 is within range of the WiFi signal for a successful connection.

/*
 * Author: Avant Maker
 * Date: February 8, 2025
 * Version: 1.0
 * Description: This code demonstrates how to connect an ESP32 
 * to a WiFi network and retrieve the DNS server IP address of 
 * the connected network using the ESP32 WiFi library's WiFi.dnsIP(). 
 *
 * 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/references/esp32-arduino-core-index/
 *
 * 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 
 * innovative ideas to life.
 */

#include <WiFi.h>

const char* ssid = "your_SSID";
const char* password = "your_PASSWORD";

void setup() {
    Serial.begin(115200);
    WiFi.begin(ssid, password);

    Serial.println("Connecting to WiFi...");
    while (WiFi.status() != WL_CONNECTED) {
        delay(500);
        Serial.print(".");
    }
    Serial.println("\nConnected to WiFi!");

    // Retrieve and print the DNS server IP address
    IPAddress dns = WiFi.dnsIP();
    Serial.print("DNS Server IP Address: ");
    Serial.println(dns);
}

void loop() {
    // Your code here
}

AvantMaker Tutorial Suggestion

If you want to learn more about the ESP32’s WiFi capabilities, we’ve created a beginner-friendly guide that explains them in detail. Just click the link below, and you’ll be teleported to that page. It will clear up any confusion you may have while connecting your ESP32 to WiFi or setting it up as a WiFi access point (AP).

ESP32 Essential Guide – Network Section – WiFi Chapter

ESP32 Library Index

ESP32 Arduino Core Library


FAQ

Ready to experiment and explore more about ESP32? Visit our website’s All About ESP32 Resources Hub, packed with tutorials, guides, and tools to inspire your maker journey. Experiment, explore, and elevate your skills with everything you need to master this powerful microcontroller platform!

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