Team Infinity Tech:

Published June 23, 2017 © CC0

Smart Home System [AHCS]

Very easy and effective home automation system based on PIC16F877A. Control home appliances remotely and monitor fire and break-ins.

AdvancedFull instructions provided10 hours2,781

Things used in this project

Hardware components

PIC 16f877a

Adafruit Standard LCD - 16x2 White on Blue

SparkFun Button Pad 4x4 - LED Compatible

or normal keypad as i used

Temperature Sensor

IR TX-RX sensor

relays 5 volt coil

the quantity depends on the number of home appliances you will control

DTMF decoder MT8870

LEDS + Resistors + capacitors + buttons

as showed in schematics below

Buzzer

Software apps and online services

Protues 8

MikroC for PIC

Story

This is the most easy AHCS (Automated Home Control System) based on 16F877A MCU's taking into account peoples annual average income.

Project Features

Easy DIY project

You can control home appliances outdoors in a cheap way

Door security system

Fire Alarm

Security system with password

Main System

System block diagram

DTMF Control System

DTMF signals provides you the cheapest and most efficient method to control your home devices remotely wherever you are. Just make a call for the system and press the suitable number to turn ON/OFF some devices (i.e. TV, air conditioner, block water access, gas access for children safety).

control devices from mobile pad.

DTMF Decoder

You need a DTMF decoder so that PIC 16F877A could understand it. The circuit is like this:

DTMF decoder interfacing with PIC

Connect the Devices

Now you need to interface your home devices such as lights, gas/water valve, air conditioning, and security system. Each device must be interfaced as is in pic through a relay:

Simulation

the main part in simulation.

Security System

It protects your house from fire by activating the fire alarm.

You can set up for an automatic call to 911 when the alarm goes off, but we need a GSM Module. It is expensive here, so we are going to skip this part :D

Protection by robbery is through the anti-motion sensors.

For the motion sensing, you can use PIR sensor or simple IR tx/rx sensor.

I know its range is poor but it's cheap and doing good for the modelling. The following photos show how I simulated that system in Protues.

Keypad

For the user password, we need the keypad. Password is important to disable/ enable the system. When you trigger the system by pressing its button from mobile pad, it connects power to the Security system MCU to activate system functionality. You really need to enter the password.

You can manipulate these Security steps as you like. I will provide you the open source and you can add your touch. In Protues simulations, I used buttons instead of flame and IR sensor because I hate the external libraries for sensor modules.

That's all folks. You will find codes and schematics at attachment section.

If you have any questions comment here or contact me.

Mobile: +201060449214

Gmail: Mrjoe767@gmail.com

FB: WWW.facebook.com/joe2050

Linkedin: www.linkedin.com/in/mohamed-maher-37b167a5

Code

/* *******************************
** File: SH V2.1
** Developer :  M.Maher
**MUC : PIC 16F877A
       Clock - 20MHz
       MIkro C Compilier
All CopyRights Reserved for Infinity-Tech
Date : 12/3/2016
************************************
 * Please contact me for more information .
 * Mobile: +201060449214
 * Gmail : Mrjoe767@gmail.com
 * FB    : WWW.facebook.com/joe2050
 * Linkedin : www.linkedin.com/in/mohamed-maher-37b167a5
  ***********************************
*/



// LCD module connections
sbit LCD_RS at Rc0_bit;
sbit LCD_EN at Rc1_bit;
sbit LCD_D4 at Rc2_bit;
sbit LCD_D5 at Rc3_bit;
sbit LCD_D6 at Rc4_bit;
sbit LCD_D7 at Rc5_bit;

sbit LCD_RS_Direction at TRISc0_bit;
sbit LCD_EN_Direction at TRISc1_bit;
sbit LCD_D4_Direction at TRISc2_bit;
sbit LCD_D5_Direction at TRISc3_bit;
sbit LCD_D6_Direction at TRISc4_bit;
sbit LCD_D7_Direction at TRISc5_bit;
// End LCD module connections



// Var_Declare .



unsigned int LM_Temp = 0;
   float mV;
   unsigned char temp[16];



// Functions



void main() {
  portb=0;
  trisb=0b00111111;

  porta=0;
  trisa=0b00000001;
  portd=0;
  trisd=0;



ADC_Init();


    Lcd_Init();
    Lcd_Cmd(_LCD_CLEAR);
    Lcd_Cmd(_LCD_CURSOR_OFF);
    Lcd_Out(1,2 , "Mansoura Unvi.");
    Lcd_Out(2, 4, "SH-DTMF");
    Delay_ms(1500);
    Lcd_Cmd(_LCD_CLEAR);

while (1) {
  LM_Temp = ADC_Read(0);

  mV = LM_Temp * 5000.0 /1024.0;
  mV = mV/10.0;
    FloatToStr(mV, temp);
    temp[4]=0;
    Lcd_Chr(1,5,223);
    Lcd_Chr(1,6,'C');
    Lcd_Out(1, 1, temp);
    Delay_ms(500);
    
    //BUTTONS
          if(portb.b4==1){
                  portd=255;
                  lcd_out(1,10,"GAS/W");
                  lcd_out(2,10,"[ON]");
                  lcd_out(2,1,"Secure");
                  
                  }
                  
          if(portb.b5==1){
                  portd=0;
                  lcd_out(1,10,"GAS/W");
                  lcd_out(2,10,"[OFF]");
                  lcd_out(2,1,"UnSecure");

                  }
     //DTMF CONTROL States , google DTMF decoding table to understand how it works 
     
      if( portb.f3 ==0 && portb.f2 ==0 && portb.f1 ==0 && portb.f0 ==1)      //1- LH ON
          { portd.b0=1;  }

        else if( portb.f3 ==0 && portb.f2 ==0 && portb.f1 ==1 && portb.f0 ==0) //2- LH F
          {  portd.b0=0; }

        else if( portb.f3 ==0 && portb.f2 ==0 && portb.f1 ==1 && portb.f0 ==1) //3 - mot ON
          {  portd.b2=1; }

        else if( portb.f3 ==0 && portb.f2 ==1 && portb.f1 ==0 && portb.f0 ==0) //4 - mot F
          {  portd.b2=0; }

        else if( portb.f3 ==0 && portb.f2 ==1 && portb.f1 ==0 && portb.f0 ==1)  //5 - w/gas ON
          { portd.b3=1;
            lcd_out(1,10,"GAS/W");
            lcd_out(2,10,"[ON]"); }

        else if( portb.f3 ==0 && portb.f2 ==1 && portb.f1 ==1 && portb.f0 ==0)  //6 - w/GAS F
          { portd.b3=0;
            lcd_out(1,10,"GAS/W");
            lcd_out(2,10,"[OFF]");}

        else if( portb.f3 ==0 && portb.f2 ==1 && portb.f1 ==1 && portb.f0 ==1)  //7 - Secure ON
          {  portd.b4=1;
             lcd_out(2,1,"Secure"); }

        else if( portb.f3 ==1 && portb.f2 ==0 && portb.f1 ==0 && portb.f0 ==0)  //8 - secure  F
          {  portd.b4=0;
             lcd_out(2,1,"UnSecure"); }

        else if( portb.f3 ==1 && portb.f2 ==0 && portb.f1 ==0 && portb.f0 ==1)  //full ON
          {  portd.b1=1;
              }

          /*if( portb.f3 ==0 && portb.f2 ==0 && portb.f1 ==0 && portb.f0 ==0)  //0 alarm F
          {  portd=0;
             lcd_out(2,1,"UnSecure"); }  */



          }


}

}

/* *************************
   Task :  securty system
   PIC  : 16F877A
   Coder: M.Maher
   osc : 20 MHZ
***************************
 * Please contact me for more information .
 * Mobile: +201060449214
 * Gmail : Mrjoe767@gmail.com
 * FB    : WWW.facebook.com/joe2050
 * Linkedin : www.linkedin.com/in/mohamed-maher-37b167a5
  ******************************************************** */ 


#define d delay_ms(800)

sbit LCD_RS at Rc0_bit;
sbit LCD_EN at Rc1_bit;
sbit LCD_D4 at Rc2_bit;
sbit LCD_D5 at Rc3_bit;
sbit LCD_D7 at Rc4_bit;
sbit LCD_D6 at Rc5_bit;

sbit LCD_RS_Direction at TRISc0_bit;
sbit LCD_EN_Direction at TRISc1_bit;
sbit LCD_D4_Direction at TRISc2_bit;
sbit LCD_D5_Direction at TRISc3_bit;
sbit LCD_D7_Direction at TRISc4_bit;
sbit LCD_D6_Direction at TRISc5_bit;

/////////////////////////////////////////


char str[16];
int xx;
char  keypadPort at PORTD;
unsigned short password[6];
unsigned short pass();
unsigned short i,j;


unsigned int temp;
float volt;


void main() {
  
portb=0;
trisb=0b00000111;

keypad_init();
lcd_init();
Lcd_Cmd(_LCD_CLEAR);
lcd_cmd(_lcd_cursor_off);

    pass();
       Lcd_Cmd(_LCD_CLEAR);
       lcd_out(1,2,"Mansoura Univ.");
       lcd_out(2,3,"Home Security");
       d;d;
       Lcd_Cmd(_LCD_CLEAR);
    
    
while(1){
    check:
    if(portb.b0==1){
           portb.b3=1;
           Lcd_out(1,2,"Calling 911 ...");
           lcd_out(2,5,"UNSECURE");
           delay_ms(1000);
             }
    if(portb.b1==0){
           portb.b3=1;
           Lcd_out(1,2,"Calling 911 ...");
           lcd_out(2,6,"FIRE");
           delay_ms(1000);
             }
    if(portb.b2==1){
           Lcd_Cmd(_LCD_CLEAR);
           portb.b3=0;
           lcd_out(1,6,"SECURE");
           goto check ;
             }
    }
 
 }


// get passoword function 

unsigned short pass(){
Lcd_Cmd(_LCD_CLEAR);
Lcd_Out(1, 1, "You Have 3 Tries");d;d;
loop:

Lcd_Cmd(_LCD_CLEAR);
Lcd_Out(1, 1, "Enter Password :");

for(i=0;i<4;i++){

while (password[i] == 0)
           {
            password[i] = Keypad_Key_Click();
           }
          if(password[i]==1)     password[i]  = '7';
          if(password[i]==2)     password[i]  = '4';
          if(password[i]==3)     password[i]  = '1';
          if(password[i]==5)     password[i]  = '8';
          if(password[i]==6)     password[i]  = '5';
          if(password[i]==7)     password[i]  = '2';
          if(password[i]==8)     password[i]  = '0';
          if(password[i]==9)     password[i]  = '9';
          if(password[i]==10)    password[i]  = '6';
          if(password[i]==11)    password[i]  = '3';
          Lcd_Chr(2, i+1,password[i]);
      }
    if (strcmp(password,"1993")==0){return 1;}
    else {
     j++;
    if(j==3){while(1){
     lcd_cmd(_lcd_clear);
     lcd_out(1,1,"Wrong User...");d;
     portb.B3=1;
     }}
    else {
    password[0]=0;
    password[1]=0;
    password[2]=0;
    password[3]=0;

     lcd_cmd(_lcd_clear);
     lcd_out(1,1,"Wrong password");
     d;d;
     goto loop;
}}}

Credits

Mohamed Maher

1 project • 68 followers

Experienced Founder with a demonstrated history of working in the electrical and electronic manufacturing industry, Embedded System solution

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Smart Home System [AHCS]