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code for DTMF and bluetooth based digital switch board

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This document contains code for an Arduino project that controls home appliances like lights and fans using Bluetooth. It initializes the USART for Bluetooth communication, defines functions for sending commands to an LCD display and controlling outputs on ports B and C. When a number from 1-8 is received over Bluetooth, it will turn on different combinations of lights and fans on port C and display the status on the LCD.

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APPENDIX 1 /* * bluetooth/Lcd/rkg.c * Created: 4/6/2015 4:30:08 PM * Author: Shashi Verma */ #include<avr/io.h> #include<util/delay.h> #define lcd PORTB #define rs PB0 #define rw PB1 #define en PB2 void lcd_cmd(unsigned char com); void lcd_data(unsigned char data); void lcd_string(unsigned char *str); //------------------------------------------------------------------------ void USARTInit(uint16_t ubrr_value) { UBRRL = ubrr_value; UBRRH = (ubrr_value>>8); UCSRC|=(1<<URSEL)|(1<<UCSZ1)|(1<<UCSZ0); UCSRB|=(1<<RXEN)|(1<<TXEN)|(1<<RXCIE); } unsigned char USARTReadChar() { while(!(UCSRA & (1<<RXC))); return UDR;
} void USARTWriteChar(char data) { while(!(UCSRA & (1<<UDRE))); UDR=data; } void USART_StringTransmit(unsigned char s[]) { int i=0; while(s[i]!='0') { USARTWriteChar(s[i]); i++; } } void main() { int x; DDRB=0xFF; DDRC=0xFF; char Recieved_command; _delay_ms(50); USARTInit(51); lcd_cmd(0x02);//home location lcd_cmd(0x28);//2x16 lcd 4bit mode lcd_cmd(0x0C);//dispy on cursor blink lcd_cmd(0x06);//increament
while(1) { Recieved_command=USARTReadChar(); if(Recieved_command=='1') { USART_StringTransmit("n Light On 1 "); PORTC=0b00000001; lcd_cmd(0xc0); lcd_string(" Light On 1 "); } else if(Recieved_command=='2') { USART_StringTransmit("n Light On 2 "); PORTC=0b00000010; lcd_cmd(0xc0); lcd_string(" Light On 2 "); } else if(Recieved_command=='3') { USART_StringTransmit("n Fan On "); PORTC=0b00000100; lcd_cmd(0xc0); lcd_string(" Fan On "); } else if(Recieved_command=='4') { USART_StringTransmit("n Both Light On");
PORTC=0b00000011; lcd_cmd(0xc0); lcd_string(" Both Light On "); } else if(Recieved_command=='5') { USART_StringTransmit("n Light 1 & Fan On"); PORTC=0b00000101; lcd_cmd(0xc0); lcd_string("Light 1 & Fan On "); } if(Recieved_command=='6') { USART_StringTransmit("n Light 2 & Fan On "); PORTC=0b00000110; lcd_cmd(0xc0); lcd_string("Light 2 & Fan On "); } else if(Recieved_command=='7') { USART_StringTransmit("n All Device On!!"); PORTC=0b00000111; lcd_cmd(0xc0); lcd_string(" All Device On !! } else if(Recieved_command=='8') {
USART_StringTransmit("n Shut Down !! "); PORTC=0b00000000; lcd_cmd(0xc0); lcd_string(" Shut Down !! ") } } } void lcd_cmd(unsigned char com) { //for command rs=0,rw=0,en=1,en=0 char cmd1; cmd1=(com&(0xF0));//upper 4 bit data lcd=cmd1; lcd&=~(1<<rs);//rs=0 lcd&=~(1<<rw);//rw=0 lcd|=(1<<en);//en=1 _delay_ms(5); lcd&=~(1<<en); cmd1=((com<<4)&(0xF0));// Lower 4 bit data lcd=cmd1; lcd&=~(1<<rs);//rs=0 lcd&=~(1<<rw);//rw=0 lcd|=(1<<en);//en=1 _delay_ms(5); lcd&=~(1<<en); } void lcd_data(unsigned char data) {
unsigned char data1; data1=(data&(0xF0));// upper 4 bit lcd=data1; lcd|=(1<<rs); //rs=1 lcd&=~(1<<rw);//rw=0 lcd|=(1<<en);//en=1 _delay_ms(1); lcd&=~(1<<en);//en=0 data1=((data<<4)&(0xF0));//lower 4 bit data lcd=data1; lcd|=(1<<rs);//rs=1 lcd&=~(1<<rw);//rw=0 lcd|=(1<<en);//en=1 _delay_ms(1); lcd&=~(1<<en); } //-------------------------------------------------------------- void lcd_string(unsigned char *str) { int i=0; while(str[i]!='0') { lcd_data(str[i]); i++; } }
APPENDIX /* * home_automatio_RKGEC.c * Created: 3/21/2015 7:49:00 AM * Author: Shashi */ #include <avr/io.h> #include<util/delay.h> int main(void) { // DDRA=0XFF DDRB=0x00; DDRC=0xFF; while(1) { if(PINB==0b00000001) { PORTC=0b00000001; } if(PINB==0b00000010) { PORTC=0b00000010; } if(PINB==0b00000011) { PORTC=0b00000100; } if(PINB==0b00000100)
{ PORTC=0b00000011; } if(PINB==0b000000101) { PORTC=0b00000101; } if(PINB==0b00000110) { PORTC=0b00000110; } if(PINB==0b00000111) { PORTC=0b00000111; } if(PINB==0b00001000) { PORTC=0b00000000; } { PORTA=0b00000100; _delay_ms(3600000); PORTA=0b00000000; _delay_ms(39600000); } } }

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code for DTMF and bluetooth based digital switch board

  • 1. APPENDIX 1 /* * bluetooth/Lcd/rkg.c * Created: 4/6/2015 4:30:08 PM * Author: Shashi Verma */ #include<avr/io.h> #include<util/delay.h> #define lcd PORTB #define rs PB0 #define rw PB1 #define en PB2 void lcd_cmd(unsigned char com); void lcd_data(unsigned char data); void lcd_string(unsigned char *str); //------------------------------------------------------------------------ void USARTInit(uint16_t ubrr_value) { UBRRL = ubrr_value; UBRRH = (ubrr_value>>8); UCSRC|=(1<<URSEL)|(1<<UCSZ1)|(1<<UCSZ0); UCSRB|=(1<<RXEN)|(1<<TXEN)|(1<<RXCIE); } unsigned char USARTReadChar() { while(!(UCSRA & (1<<RXC))); return UDR;
  • 2. } void USARTWriteChar(char data) { while(!(UCSRA & (1<<UDRE))); UDR=data; } void USART_StringTransmit(unsigned char s[]) { int i=0; while(s[i]!='0') { USARTWriteChar(s[i]); i++; } } void main() { int x; DDRB=0xFF; DDRC=0xFF; char Recieved_command; _delay_ms(50); USARTInit(51); lcd_cmd(0x02);//home location lcd_cmd(0x28);//2x16 lcd 4bit mode lcd_cmd(0x0C);//dispy on cursor blink lcd_cmd(0x06);//increament
  • 3. while(1) { Recieved_command=USARTReadChar(); if(Recieved_command=='1') { USART_StringTransmit("n Light On 1 "); PORTC=0b00000001; lcd_cmd(0xc0); lcd_string(" Light On 1 "); } else if(Recieved_command=='2') { USART_StringTransmit("n Light On 2 "); PORTC=0b00000010; lcd_cmd(0xc0); lcd_string(" Light On 2 "); } else if(Recieved_command=='3') { USART_StringTransmit("n Fan On "); PORTC=0b00000100; lcd_cmd(0xc0); lcd_string(" Fan On "); } else if(Recieved_command=='4') { USART_StringTransmit("n Both Light On");
  • 4. PORTC=0b00000011; lcd_cmd(0xc0); lcd_string(" Both Light On "); } else if(Recieved_command=='5') { USART_StringTransmit("n Light 1 & Fan On"); PORTC=0b00000101; lcd_cmd(0xc0); lcd_string("Light 1 & Fan On "); } if(Recieved_command=='6') { USART_StringTransmit("n Light 2 & Fan On "); PORTC=0b00000110; lcd_cmd(0xc0); lcd_string("Light 2 & Fan On "); } else if(Recieved_command=='7') { USART_StringTransmit("n All Device On!!"); PORTC=0b00000111; lcd_cmd(0xc0); lcd_string(" All Device On !! } else if(Recieved_command=='8') {
  • 5. USART_StringTransmit("n Shut Down !! "); PORTC=0b00000000; lcd_cmd(0xc0); lcd_string(" Shut Down !! ") } } } void lcd_cmd(unsigned char com) { //for command rs=0,rw=0,en=1,en=0 char cmd1; cmd1=(com&(0xF0));//upper 4 bit data lcd=cmd1; lcd&=~(1<<rs);//rs=0 lcd&=~(1<<rw);//rw=0 lcd|=(1<<en);//en=1 _delay_ms(5); lcd&=~(1<<en); cmd1=((com<<4)&(0xF0));// Lower 4 bit data lcd=cmd1; lcd&=~(1<<rs);//rs=0 lcd&=~(1<<rw);//rw=0 lcd|=(1<<en);//en=1 _delay_ms(5); lcd&=~(1<<en); } void lcd_data(unsigned char data) {
  • 6. unsigned char data1; data1=(data&(0xF0));// upper 4 bit lcd=data1; lcd|=(1<<rs); //rs=1 lcd&=~(1<<rw);//rw=0 lcd|=(1<<en);//en=1 _delay_ms(1); lcd&=~(1<<en);//en=0 data1=((data<<4)&(0xF0));//lower 4 bit data lcd=data1; lcd|=(1<<rs);//rs=1 lcd&=~(1<<rw);//rw=0 lcd|=(1<<en);//en=1 _delay_ms(1); lcd&=~(1<<en); } //-------------------------------------------------------------- void lcd_string(unsigned char *str) { int i=0; while(str[i]!='0') { lcd_data(str[i]); i++; } }
  • 7. APPENDIX /* * home_automatio_RKGEC.c * Created: 3/21/2015 7:49:00 AM * Author: Shashi */ #include <avr/io.h> #include<util/delay.h> int main(void) { // DDRA=0XFF DDRB=0x00; DDRC=0xFF; while(1) { if(PINB==0b00000001) { PORTC=0b00000001; } if(PINB==0b00000010) { PORTC=0b00000010; } if(PINB==0b00000011) { PORTC=0b00000100; } if(PINB==0b00000100)