This is of Home Automation made by me, It is a home automation project based on Blynk application and IoT (Internet of things). In this project, I customize the code given by the Blynk as per my needs. In this project I have used relay module of 4 relays and customize the one relay of the all 4 relays for automatically on and off on the condition based on the environment light and motion that the condition for environment light is given to the microprocessor by the LDR sensor and the motion is give to the microprocessor by the PIR sensor and the microprocessor will automatically turn on and off the relay on the basis of the input data given by the PIR sensor and the LDR sensor. In this project, the microprocessor will turn on the customize relay on the basis of environment light and motion. Let's take an example that there is environment light available in the environment and there is a motion for that condition the customized relay will stay turned off, but only one condition is that when the relay turns on, and the condition is when there is not enough environment light and as well as motion is detected. Not only that, we can easily control the 4 relays as well as that customize relay through the Blynk app from anywhere in the world.
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.
Customized By Anupam Dutta (https://github.com/kinganupamdutta27/Anupam-Dutta)
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[] = "[Authentication code from blink goes here]";
// Your WiFi credentials.
// Set password to "" for open networks.
char ssid[] = "[Wifi name / SSID goes here]"; //WiFi name or SSID of the wifi network which is to be conected
char pass[] = "[WiFi password]"; // "" for a open wifi network
const int LDR = A0; // Defining LDR PIN
int input_val = 0; // Varible to store Input values
int relayInput = 2; // Relay to be used by the Nodemcu automatically based on the input from LDR module & PIR Sencor
int Status = 13; //LED light for motion status
int sensor = 5; // PIR Sensor Input at Pin 5 (Pin - D5)
int vpin6; //virtual pin declare for controlling the Relay manualy from the blink app
void setup()
{
// Debug console
Serial.begin(9600);
Blynk.begin(auth, ssid, pass);
Serial.begin(9600);
pinMode(LDR, INPUT);
pinMode(relayInput, OUTPUT);
pinMode(sensor, INPUT);
pinMode(Status, OUTPUT);
}
BLYNK_WRITE(V6) //Virtual Pin Configarations
{
int varpinn = param.asInt();
vpin6 = varpinn;
Serial.print("VAR PIN 6 : " );
Serial.println(varpinn);
}
void loop()
{
Blynk.run();
input_val = analogRead(LDR); // Reading Input from the LDR MODULE
Serial.print("LDR value is : " ); // Print the String - "LDR value is : "
Serial.println(input_val); // Writing input on serial monitor.
delay(1000);
long state = digitalRead(sensor); //reading the value from the PIR Sensor
if(input_val > 950 && state == HIGH) // WHEN THIS CONDITION WILL EXICUTE IT MEANS "Motion detected! Environment Light OFF" & IT WILL TURN ON STATUS LED
{
digitalWrite (Status, HIGH);
Serial.println("Motion detected! Environment Light OFF");
delay(1000);
}
else if(input_val < 950 && state == HIGH) //WHEN THIS CONDITION WILL EXICUTE IT MEANS "Motion detected! Environment light ON" & IT WILL TURN ON STATUS LED
{
digitalWrite (Status, HIGH);
Serial.println("Motion detected! Environment light ON");
delay(1000);
}
else if(input_val < 950 && state == LOW) //WHEN THIS CONDITION WILL EXICUTE IT MEANS "Motion absent! Environment light ON" & IT WILL TURN OFF STATUS LED
{
digitalWrite (Status, LOW);
Serial.println("Motion absent! Environment light ON");
delay(1000);
}
else if(input_val > 950 && state == LOW)////WHEN THIS CONDITION WILL EXICUTE IT MEANS "Motion absent! Environment light OFF" & IT WILL TURN OFF STATUS LED
{
digitalWrite (Status, LOW);
Serial.println("Motion absent! Environment light OFF");
delay(1000);
}
if(vpin6 == 0) //IF VALUE OF vpin6 is 0 then we can control the relay via Blink App
{
Blynk.run();
}
else if(vpin6 == 1) ///IF VALUE OF vpin6 is 1 then the relay will automatically controlled by the NodeMCU by values based on PIR SENSOR and LDR SENSOR
{
if(input_val < 1023 && state == HIGH)
{
digitalWrite(relayInput, HIGH);
}
else if(input_val < 1023 && state == LOW)
{
digitalWrite(relayInput, HIGH);
}
else if(input_val > 950 && state == HIGH)
{
digitalWrite(relayInput, LOW);
Serial.println("LIGHT ON");
}
else
{
digitalWrite(relayInput, HIGH);
}
}
else
{
digitalWrite(relayInput, HIGH);
}
} //Customized By Anupam Dutta (https://github.com/kinganupamdutta27/Anupam-Dutta)
