ESP8266 V2+Blynk on/off Switch everywhere in the world via Wifi

Please learn previous VDO

Load Blynk install to mobile phone 

http://www.blynk.cc/

Procedure

Use arduino UNO for upload program to ESP8266 only will disconnect after finish.

1. Hook up wiring 

Upload

ESP8266    to    Arduino UNO

RX             >>              Pin0 

TX             >>              Pin1

CH-PD      >>              3.3 V !!!

VCC          >>              3.3 V !!!

GPIO0       >>              GND

GND          >>              GND

2. Connect relay board and run

Open GPIO 0

3.Code

/*************************************************************

  Download latest Blynk library here:

    https://github.com/blynkkk/blynk-library/releases/latest

  Blynk is a platform with iOS and Android apps to control

  Arduino, Raspberry Pi and the likes over the Internet.

  You can easily build graphic interfaces for all your

  projects by simply dragging and dropping widgets.

    Downloads, docs, tutorials: http://www.blynk.cc

    Sketch generator:           http://examples.blynk.cc

    Blynk community:            http://community.blynk.cc

    Follow us:                  http://www.fb.com/blynkapp

                                http://twitter.com/blynk_app

  Blynk library is licensed under MIT license

  This example code is in public domain.

 *************************************************************

  This example runs directly on ESP8266 chip.

  Note: This requires ESP8266 support package:

    https://github.com/esp8266/Arduino

  Please be sure to select the right ESP8266 module

  in the Tools -> Board menu!

  Change WiFi ssid, pass, and Blynk auth token to run :)

  Feel free to apply it to any other example. It's simple!

 *************************************************************/

/* Comment this out to disable prints and save space */

#define BLYNK_PRINT Serial

#include <ESP8266WiFi.h>

#include <BlynkSimpleEsp8266.h>

// You should get Auth Token in the Blynk App.

// Go to the Project Settings (nut icon).

char auth[] = "YourAuthToken";

// Your WiFi credentials.

// Set password to "" for open networks.

char ssid[] = "YourNetworkName";

char pass[] = "YourPassword";

void setup()

{

  // Debug console

  Serial.begin(9600);

  Blynk.begin(auth, ssid, pass);

}

void loop()

{

  Blynk.run();

}

ESP8266 V1 Web control on/off by IP address

Hardware

Arduino UNO what ever board you have

ESP8266 V1

and jumper wiring

Wiring

Procedure

Use arduino UNO for upload program to ESP8266 only will disconnect after finish.

1. Hook up wiring 

Upload

ESP8266    to    Arduino UNO

RX             >>              Pin0 

TX             >>              Pin1

CH-PD      >>              3.3 V !!!

VCC          >>              3.3 V !!!

GPIO0       >>              GND

GND          >>              GND

2.Use example file from IDE

File >> ESP8266wifi>> WifiWebserver

or copy here#

3. Run

RX             >>              Pin0 

TX             >>              Pin1

CH-PD      >>              3.3 V !!!

VCC          >>              3.3 V !!!

GPIO2       >>              + LED 

-LED         >>              GND

GND          >>              GND

/*

 *  This sketch demonstrates how to set up a simple HTTP-like server.

 *  The server will set a GPIO pin depending on the request

 *    http://server_ip/gpio/0 will set the GPIO2 low,

 *    http://server_ip/gpio/1 will set the GPIO2 high

 *  server_ip is the IP address of the ESP8266 module, will be 

 *  printed to Serial when the module is connected.

 */

#include <ESP8266WiFi.h>

const char* ssid = "your-ssid";

const char* password = "your-password";

// Create an instance of the server

// specify the port to listen on as an argument

WiFiServer server(80);

void setup() {

  Serial.begin(115200);

  delay(10);

  // prepare GPIO2

  pinMode(2, OUTPUT);

  digitalWrite(2, 0);

  

  // Connect to WiFi network

  Serial.println();

  Serial.println();

  Serial.print("Connecting to ");

  Serial.println(ssid);

  

  WiFi.begin(ssid, password);

  

  while (WiFi.status() != WL_CONNECTED) {

    delay(500);

    Serial.print(".");

  }

  Serial.println("");

  Serial.println("WiFi connected");

  

  // Start the server

  server.begin();

  Serial.println("Server started");

  // Print the IP address

  Serial.println(WiFi.localIP());

}

void loop() {

  // Check if a client has connected

  WiFiClient client = server.available();

  if (!client) {

    return;

  }

  

  // Wait until the client sends some data

  Serial.println("new client");

  while(!client.available()){

    delay(1);

  }

  

  // Read the first line of the request

  String req = client.readStringUntil('\r');

  Serial.println(req);

  client.flush();

  

  // Match the request

  int val;

  if (req.indexOf("/gpio/0") != -1)

    val = 0;

  else if (req.indexOf("/gpio/1") != -1)

    val = 1;

  else {

    Serial.println("invalid request");

    client.stop();

    return;

  }

  // Set GPIO2 according to the request

  digitalWrite(2, val);

  

  client.flush();

  // Prepare the response

  String s = "HTTP/1.1 200 OK\r\nContent-Type: text/html\r\n\r\n<!DOCTYPE HTML>\r\n<html>\r\nGPIO is now ";

  s += (val)?"high":"low";

  s += "</html>\n";

  // Send the response to the client

  client.print(s);

  delay(1);

  Serial.println("Client disonnected");

  // The client will actually be disconnected 

  // when the function returns and 'client' object is detroyed

}