Published April 10, 2018

Home Automation - DIY School Project

The objective of this project is to develop a home automation system using NodeMCU board with Internet being remotely controlled by mobile.

IntermediateShowcase (no instructions)4 hours2,848

Things used in this project

Hardware components

NodeMCU ESP8266 Breakout Board

We got it from: https://roboindia.com/store/nodemcu-motor-driver-shield-with-nodemcu?search=NodeMCU%20Motor%20Driver%20Shield%20with%20NodeMCU%09

LED (generic)

DC motor (generic)

Story

As technology is advancing so houses are also getting smarter. Modern houses are gradually shifting from conventional switches to centralized control system, involving remote controlled switches. Presently, conventional wall switches located in different parts of the house makes it difficult for the user to go near them to operate. Even more it becomes more difficult for the elderly or physically handicapped people to do so. Remote controlled home automation system provides a most modern solution with smart phones.

Let's start with a live demo:

In order to achieve this, a relay module is interfaced to the Node MCU board at the receiver end while on the transmitter end, a GUI application on the cell phone sends ON/OFF commands to the receiver where loads are connected. By touching the specified location on the GUI, the loads can be turned ON/OFF remotely through this technology.

Equipment Controlled:

Lighting

Pump

All the above devices can be switch on and off from smart phone app from any where, any time. It can be configured to run locally within home in case internet connectivity not available.

Steps

Step 1: Solder/connect 4 devices to NodeMCU driver board like below.

Step 2: Upload code given

Step 3: Down and configure Android App below: https://play.google.com/store/apps/details?id=esp8266.wifi.control

Step 4: Provide power supply DC (5 to 6v) to NodeMCU driver as well as rated power supply to NodeMCU board.

Step 5: Go to Mobile -> Setting -> Wifi -> Connect to hotspot name: sunshinelabz. Password is embedded in code.

Step 6: Open ESP8266 Wifi App. Enter IP: 192,168.1.99. Make sure it shows connected to above hot spot. Port is 80.

Step 7: Each 4 device you want to control name then in app setting dash board. If names don't reflect. Logout and re-open the application.

Step 8: Test. Make sure to check all connectivity, no short circuits and water is poured in the container water pump is placed.

Advantages:

No manual intervention needed to control appliances / devices.

Effective power utilization.

Long life of devices as no physically contact.

Limitations:

Initial setup is costlier

Need of internet connectivity needed in order to control remotely.

Note: If you want to control devices from any where in world you do port forwarding from your wifi router. This is not covered in this article.

Code

NodeMCU_ESPCompatible code

//This example will set up a static IP - in this case 192.168.1.99
//More information - mail us : projectsforall777@gmail.com
//Website: www.labsforall.com
 
#include <ESP8266WiFi.h>

//////////////////////
// WiFi Definitions //
//////////////////////
const char WiFiAPPSK[] = "12345678";
 
int gas = D5;
int light = D6;

const int ANALOG_PIN = A0; // The only analog pin on the Thing

//for nodemcu
// Pump
const int IN1 = D0;
const int IN2 = D1;

// DC Fan
const int IN3 = D2;
const int IN4 = D3;

WiFiServer server(80);

IPAddress apIP(192, 168, 1, 99); // where xx is the desired IP Address

void setup() {
  Serial.begin(9600);
  delay(10);
 
  Serial.print(F("Setting static ip to : "));
  Serial.println(apIP);

  WiFi.mode(WIFI_AP);
  WiFi.softAPConfig(apIP, apIP, IPAddress(255, 255, 255, 0));   // subnet FF FF FF 00
  WiFi.softAP("sunshinelabz", WiFiAPPSK);
  
  // Connect to WiFi network
  Serial.println();
 
//  // Start the server
  server.begin();
  Serial.println("Server started");

  pinMode(IN1, OUTPUT);
  pinMode(IN2, OUTPUT);

  pinMode(IN3, OUTPUT);
  pinMode(IN4, OUTPUT);

  pinMode(gas, OUTPUT);
  pinMode(light, OUTPUT);

  Fan_Off();
  Pump_Off();
  Gas_Off();
  Light_Off();
}

void Fan_On()
{
  digitalWrite(IN1, HIGH);
  digitalWrite(IN2, LOW);
}

void Fan_Off()
{
  digitalWrite(IN1, LOW);
  digitalWrite(IN2, LOW);
}

void Pump_On()
{
  digitalWrite(IN3, HIGH);
  digitalWrite(IN4, LOW);
}

void Pump_Off()
{
  digitalWrite(IN3, LOW);
  digitalWrite(IN4, LOW);
}

void Gas_On()
{
  digitalWrite(gas, HIGH);
}

void Gas_Off()
{
  digitalWrite(gas, LOW);
}

void Light_On()
{
  digitalWrite(light, HIGH);
}

void Light_Off()
{
  digitalWrite(light, LOW);
}
 
void loop() {
 
 // Check if a client has connected
  WiFiClient client = server.available();
  if (!client) {
    return;
  }

  // Read the first line of the request
  String req = client.readStringUntil('\r');
  Serial.println(req);
  client.flush();

  // Match the request
  int val = -1; // We'll use 'val' to keep track of both the
                // request type (read/set) and value if set.

  Serial.print("Full request: ");
  Serial.println(req);

  Serial.print("Index of /status1=1 is: ");
  Serial.println(req.indexOf("/status1=1"));

  
  Serial.print("Index of /status1=0 is: ");
  Serial.println(req.indexOf("/status1=0"));


  Serial.print("Index of ?cmd=0 is: ");
  Serial.println(req.indexOf("?cmd=0"));

  if (req.indexOf("/status1=1") == 4)
  {
    Serial.println("Fan On");
  
    Fan_On();
  }
  
  else if (req.indexOf("/status1=0") == 4)
  {
    Serial.println("Fan Off");
    
    Fan_Off();
  }

  else if (req.indexOf("/status2=1") == 4)
  {
    Serial.println("Pump On");
    
    Pump_On();
  }

  else if (req.indexOf("/status2=0") == 4)
  {
    Serial.println("Pump Off");
    
    Pump_Off();
  }

  else if (req.indexOf("/status3=1") == 4)
  {
    Serial.println("gas On");
    
    Gas_On();
  }

  else if (req.indexOf("/status3=0") == 4)
  {
    Serial.println("gas off");
    
    Gas_Off();
  }

  else if (req.indexOf("/status4=1") == 4)
  {
    Serial.println("light On");
    
    Light_On();
  }

  else if (req.indexOf("/status4=0") == 4)
  {
    Serial.println("light off");
    
    Light_Off();
  }

  client.flush();

  // Prepare the response. Start with the common header:
  String s = "HTTP/1.1 200 OK\r\n";
  s += "Content-Type: text/html\r\n\r\n";
  s += "<!DOCTYPE HTML>\r\n<html>\r\n";
  // If we're setting the LED, print out a message saying we did
  if (val >= 0)
  {
    s += "LED is now ";
    s += (val)?"on":"off";
  }
  else if (val == -2)
  { // If we're reading pins, print out those values:
    s += "Analog Pin = ";
    s += String(analogRead(ANALOG_PIN));
    s += "<br>"; // Go to the next line.
    //s += "Digital Pin 12 = ";
    //s += String(digitalRead(DIGITAL_PIN));
  }
  else
  {
    s += "Invalid Request.<br> Try /led/1, /led/0, or /read.";
  }
  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
 
}

Credits

TechGuru

8 projects • 13 followers

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Thanks to roboindia.com.

Home Automation - DIY School Project

Things used in this project

Hardware components

Story

Equipment Controlled:

Steps

Advantages:

Limitations:

Schematics

How to connect

Code

NodeMCU_ESPCompatible code

Credits

TechGuru

Comments

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Home Automation - DIY School Project

Home Automation - DIY School Project

Things used in this project

Hardware components

Story

Equipment Controlled:

Steps

Advantages:

Limitations:

Schematics

How to connect

Code

NodeMCU_ESPCompatible code

Credits

TechGuru

Comments

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