Control Anything Over Internet / WiFi. IOT Light Switch_ NodeMCU ESP8266 .

Parts:

• NodeMCU ESP8266 WiFi Development Board
• LED
• 330r resistor
• Android app

Download the app from Below,

To Upload code to NodeMCU using Arduino.ide

1. Update Arduino.ide (desktop app)
2. start Arduino app
3. goto Files > Preferences Then paste the link then press ok.   http://arduino.esp8266.com/stable/package_esp8266com_index.json
4. goto Tools>Boards> Board Manager then wait untill it finds ESP8266 properties
5. Scroll down and click install
6. Then Restart the Arduino App.

Now you can upload Code in C / C++ to NodeMCU ESP8266 using Arduino.ide

Getting IP Address Code

To get the IP Address (Internet Protocol Address) Upload this Code and open serial monitor.

#include <ESP8266WiFi.h>

const char* ssid="WIFI name";
const char* password = "WIFI PASSWORD";


int ledPin = 13;


void setup() {
  
  pinMode(ledPin,OUTPUT);
  digitalWrite(ledPin,LOW);


Serial.begin(115200);
  Serial.println();
  Serial.print("Wifi connecting to ");
  Serial.println( ssid );


WiFi.begin(ssid,password);


Serial.println();
  Serial.print("Connecting");


while( WiFi.status() != WL_CONNECTED ){
      delay(500);
      Serial.print(".");        
  }


digitalWrite( ledPin , HIGH);
  Serial.println();


Serial.println("Wifi Connected Success!");
  Serial.print("NodeMCU IP Address : ");
  Serial.println(WiFi.localIP() );


}


void loop() {
  // put your main code here, to run repeatedly:


}

Project Code (To Control Light using App):

/*
    This sketch demonstrates how to set up a simple HTTP-like server.
    The server will set a GPIO pin depending on the request over Android app.
       http://server_ip/gpio/0  will set the GPIO2 low,
       http://server_ip/gpio/0  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.
*/

/*project tutorial by ashraf minhaj  http://ashrafminhajfb.blogspot.com   */

#include <ESP8266WiFi.h>

const char* ssid = "WiFi name";
const char* password = "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.mode(WIFI_STA);
  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\r\n
\r\nGPIO is now ";
  s += (val) ? "high" : "low";
  s += "

\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
}

Download the IOT Android App from Below

Attachments

• IOT_light_ashrafminhaj (2).apk
  Download