Using ESP32 As HTTP Client To send information via WiFi to remote Server

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Using ESP32 As HTTP Client To send information via WiFi to remote Server

This this video how to start send parameters to the web using ESP32 via WiFi.

Resources for this sketch

• ESP32 Github repository
• ESP32 Datasheet (pdf)
• Robojax Arduino Course on Udemy
• Get Early Access to my videos via Patreon

Arduino Code

 /*
 * ESP32 HTTP Client example
 * This example is part of Introduction to ESP32 WiFi, Bluetooth Microcontroller board
 * 
 * Updated/Written by Ahmad Shamshiri 
 * On August 25, 2019 in Ajax, Ontario, Canada
 * Watch video instruction for this cod:
 * https://youtu.be/--Fj8QDlGuQ
 * 
 * 
 Get this code and other Arduino codes from Robojax.com
Learn Arduino step by step in structured course with all material, wiring diagram and library
all in once place. Purchase My course on Udemy.com http://robojax.com/L/?id=62

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 *  * This code is "AS IS" without warranty or liability. Free to be used as long as you keep this note intact.* 
 * This code has been download from Robojax.com
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */

#include <Arduino.h>

#include <ESP8266WiFi.h>
#include <ESP8266WiFiMulti.h>

#include <ESP8266HTTPClient.h>

#include <WiFiClient.h>

ESP8266WiFiMulti WiFiMulti;
String mainURL ="http://ddas.cc/httpTest/?";
String user="user=ahmad22";
float temperature=45.3;
char type='j';

void setup() {

  Serial.begin(115200);
  // Serial.setDebugOutput(true);

  Serial.println();
  Serial.println();
  Serial.println();

  for (uint8_t t = 4; t > 0; t--) {
    Serial.printf("[SETUP] WAIT %d...
", t);
    Serial.flush();
    delay(1000);
  }

  WiFi.mode(WIFI_STA);
  WiFiMulti.addAP("Robojax", "YOur password");

}

void loop() {
  // wait for WiFi connection
  if ((WiFiMulti.run() == WL_CONNECTED)) {

    WiFiClient client;

    HTTPClient http;

    Serial.print("[HTTP] begin...
");
    if (http.begin(client, mainURL+user+"&temp="+temperature+"&type="+type)) {  // HTTP


      Serial.print("[HTTP] GET...
");
      // start connection and send HTTP header
      int httpCode = http.GET();

      // httpCode will be negative on error
      if (httpCode > 0) {
        // HTTP header has been send and Server response header has been handled
        Serial.printf("[HTTP] GET... code: %d
", httpCode);

        // file found at server
        if (httpCode == HTTP_CODE_OK || httpCode == HTTP_CODE_MOVED_PERMANENTLY) {
          String payload = http.getString();
          Serial.println(payload);
        }
      } else {
        Serial.printf("[HTTP] GET... failed, error: %s
", http.errorToString(httpCode).c_str());
      }

      http.end();
    } else {
      Serial.printf("[HTTP} Unable to connect
");
    }
  }

  delay(10000);
}