ESP32 WiFiClient Library – readStringUntil 

/*
 * Author: Avant Maker
 * Date: February 24, 2025
 * Version: 1.0
 *
 * Description: This example demonstrates how to use 
 * ESP32 WiFiClient Library's readStringUntil method to
 * read each line of the server’s response until a newline
 * character ('\n') is encountered.
 *
 * 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";         // Replace with your WiFi SSID
const char* password = "your-PASSWORD"; // Replace with your WiFi password
const char* host = "www.httpbin.org";
const int port = 80;

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

    // Connect to WiFi
    WiFi.begin(ssid, password);
    while (WiFi.status() != WL_CONNECTED) {
        delay(500);
        Serial.print(".");
    }
    Serial.println("\nConnected to WiFi");
}

void loop() {
    WiFiClient client;

    // Connect to the server
    if (!client.connect(host, port)) {
        Serial.println("Connection failed");
        delay(5000);
        return;
    }

    // Send HTTP GET request
    client.print(String("GET /get HTTP/1.1\r\n") +
                 "Host: " + host + "\r\n" +
                 "Connection: close\r\n\r\n");

    // Wait for server response
    unsigned long timeout = millis();
    while (client.available() == 0) {
        if (millis() - timeout > 5000) {
            Serial.println("Client Timeout");
            client.stop();
            return;
        }
    }

    // Read and print response line-by-line
    while (client.available()) {
        String line = client.readStringUntil('\n');
        Serial.println(line);
    }

    client.stop();
    delay(10000); // Wait before next request
}