Arduino-UNO-smart-Home-project

You need to install the essential packages first

1. LiquidCrystal_I2C.h
2. Wire.h Code:

#include <Wire.h> // Include NewLiquidCrystal Library for I2C #include <LiquidCrystal_I2C.h>

const int en = 2, rw = 1, rs = 0, d4 = 4, d5 = 5, d6 = 6, d7 = 7, bl = 3; const int i2c_addr = 0x27; LiquidCrystal_I2C lcd(i2c_addr, en, rw, rs, d4, d5, d6, d7, bl, POSITIVE);

#define e_s1 A0 //echo pin #define t_s1 A1 //Trigger pin

#define e_s2 A2 //echo pin #define t_s2 A3 //Trigger pin

int relay = 10; // Out for light

long dis_a=0,dis_b=0; int flag1=0, flag2=0; int person = 0;

//ultra_read****** void ultra_read(int pin_t,int pin_e,long &ultra_time){ long time; pinMode(pin_t,OUTPUT); pinMode(pin_e,INPUT); digitalWrite(pin_t,LOW); delayMicroseconds(2); digitalWrite(pin_t,HIGH); delayMicroseconds(10); time=pulseIn (pin_e,HIGH); ultra_time = time / 29 / 2; }

void setup() { Serial.begin(9600);// initialize serial communication at 9600 bits per second:

pinMode(relay, OUTPUT); // Set display type as 16 char, 2 rows lcd.begin(16,2);

// Print on first row lcd.setCursor(0,0); lcd.print("Welcome to smart");

// Wait 1 second //delay(1000);

// Print on second row lcd.setCursor(0,1); lcd.print("Visitor Counter");

// Wait 8 seconds delay(4000);

// Clear the display lcd.clear();

}

void loop(){ //************************* ultra_read(t_s1,e_s1,dis_a);delay(30); ultra_read(t_s2,e_s2,dis_b);delay(30); //*************************

Serial.print("da:");Serial.println(dis_a); Serial.print("db:");Serial.println(dis_b);

if(dis_a<80 && flag1==0){flag1=1; if(flag2==0){person = person+1;} }

if(dis_b<80 && flag2==0){flag2=1; if(flag1==0){person = person-1;} }

if(dis_a>80 && dis_b>80 && flag1==1 && flag2==1){ flag1=0, flag2=0; delay(1000); }

lcd.setCursor(0, 0); lcd.print("Total Person: "); lcd.print(person); lcd.print(" "); lcd.setCursor(0,1); lcd.print("Light is ");

if(person>0){ digitalWrite(relay,HIGH); lcd.print("On ");} else{ digitalWrite(relay,LOW); lcd.print("Off");} }