ESP32 WiFiClient Library – print

/*
 * Author: Avant Maker
 * Date: February 24, 2025
 * Version: 1.0
 * Description: This example demonstrates how to use the print
 * method from the ESP32 WiFiClient Library to send a POST
 * request to a web server, specifically the HTTPBin server
 * (www.httpbin.org), and how to handle the response.
 *
 * 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 Wi-Fi SSID
const char* password = "your-PASSWORD";  // Replace with your Wi-Fi password
const char* host = "www.httpbin.org";
const int port = 80;

void setup() {
    Serial.begin(115200);
    WiFi.begin(ssid, password);
    while (WiFi.status() != WL_CONNECTED) {
        delay(500);
        Serial.print(".");
    }
    Serial.println("Connected to WiFi");
}

void loop() {
    WiFiClient client;
    if (client.connect(host, port)) {
        Serial.println("Connected to server");
        // Send a POST request with sample data
        String postData = "avantmaker=HelloFromESP32";
        client.print("POST /post HTTP/1.1\r\n");
        client.print("Host: www.httpbin.org\r\n");
        client.print("Content-Type: application/x-www-form-urlencoded\r\n");
        client.print("Content-Length: ");
        client.print(postData.length());
        client.print("\r\nConnection: close\r\n\r\n");
        client.print(postData);

        // Wait for the server's response
        while (client.connected() || client.available()) {
            if (client.available()) {
                String line = client.readStringUntil('\n');
                Serial.println(line); // Print server response line by line
            }
        }
        client.stop();
        Serial.println("Disconnected");
    } else {
        Serial.println("Connection failed");
    }
    delay(5000);
}