Computer Stuff Kit Tricks: Home automation with TV remote

How to do home automation light and fan with TV remote?

Embedded system microcontroller 8052 series making home automation light and fan operate with any TV remote. Mainly use Keil c coding program can making operate between input and output pins of microcontroller 8052. First take microcontroller at89s52 40 pin, tsop1738 sensor, microcontroller development board, 5v DC power supply and remote rc5.

embedded system, microcontroller, 8052, 8051

Embedded system micro controller 8052 development board

Keil C coding

#include <reg51.H>

#define SWPort P1 // port definition

sbit IR = P3^0; // pin's definitions

sbit SW1 = P1^0;

sbit SW2 = P1^1;

sbit SW3 = P1^2;

sbit SW4 = P1^3;

sbit SW5 = P1^4;

sbit SW6 = P1^5;

sbit SW7 = P1^6;

sbit SW8 = P1^7;

void delay_3024ms(); // delay function for 3.024ms

void delay_1728ms();

void delay_4752ms(); // delay function for 4.752ms

void ReadAddr(void); // Read Address

void ReadCmd(void); // Read Command

bit ReadBit(void); // Read Bit

unsigned char temp,addr,cmd; // result in the form of Commands,Address

bit FLIP,TOG=0; // bits

char buffer[50];

void main() // main program

{

TMOD=0X01; // timer 0 mode 1 (16 bit mode)

SWPort=0x00;

while(1)

{

while(IR==1);

delay_3024ms();

FLIP=IR;

delay_4752ms();

ReadAddr();

ReadCmd();

P1=cmd;

}

void delay_3024ms(void) // delay of ms

{

TH0=0XF5; // 3.024ms

TL0=0X1D;

TR0=1;

while(TF0==0);

TR0=0;

TF0=0;

}

void delay_1728ms(void) // delay of 1.728ms

{

TH0=0XF9; //TH0=0XF9; // 1.728ms

TL0=0XC7; //TL0=0XC7;

TR0=1;

while(TF0==0);

TR0=0;

TF0=0;

}

void delay_4752ms(void) // delay of 1.728ms

{

TH0=0XEE; // 4.752ms

TL0=0XE4;

TR0=1;

while(TF0==0);

TR0=0;

TF0=0;

}

bit ReadBit(void)

{

return(IR); // return value of IR line

}

void ReadCmd(void)

{

unsigned char i;

cmd = 0;

for (i=0;i<6;i++)

{

cmd|=ReadBit()? 0x01<<i:cmd;

delay_1728ms();

P1=cmd;

}

void ReadAddr(void)

{

unsigned char i;

addr = 0;

for (i=0;i<5;i++)

{

addr|=ReadBit()? 0x01<<i:addr;

delay_1728ms();

}

The above code is for operate lights and fan through TSOP1738 sensor, the sensor pins +5v, Gnd, output these three pins are connect output pin to Port P3.0 pin. You can connect port 1 pin 1.0 to pin 1.7 total 8 pins connect to devices like three lights, two fans, bed light so on. You can operate with TV remote button 0 to 9 operate can do ON and OFF.