RF (433 MHz) Module Controlled LED Switching Project using Pic Microcontroller

RF Modules are popularly used in remote control system . In  Quadcopter , Robot remote control , Industrial remote control, telemetry and remote sensing etc.  Get more details here RF_Wiki

Basic Concepts:

RF module consists of Two Units Transmitter and Receiver. We will use two pic microcontrollers to create transmitter section and receiver section. In Transmitter section we will connect one pic18f2550 with Transmitter and this will transmit signal according to the commands. The Receiver section will be built with another pic18f2550 and receiver unit. This section will receive signal from transmitter unit and the receiver unit will send data to the microcontroller. Finally microcontroller will execute led switching according to  instructions.

RF Transmitter :

RF Module ( Wireless Radio Frequency )Transmitter_Tx

RF Module ( Wireless Radio Frequency )Transmitter Pinout

RF Receiver :

RF Module ( Wireless Radio Frequency ) Receiver Rx

RF Module ( Wireless Radio Frequency ) Receiver Rx

 Source Code :

# Transmitter :

 




char txt[16];  
 char chk;  
 int i=0,ckop=0;  
 void main() {  
 ADCON1=0x0F;         // Configure RE1 pin as input  
 CMCON=7;  
 for(i=0;i<16;i++){txt[i]=' ';}  
   TRISA.F0=1;  
    TRISA.F1=1;        // Initialize ADC  
      TRISA.F2=1;  
      TRISA.F3=1;  
   UART1_Init(2400);  
      delay_ms(200);            // Initialize LCD  
  while(1){  
  if(PORTA.F0==0){  delay_ms(100);  
  if (UART1_Tx_Idle() == 1)  
  UARt1_Write_Text(",,,,,,,,,,,");  
 UART1_Write('(');  
   UART1_Write('A');  
  UART1_Write(')');  
   UARt1_Write_Text(",,,,,,,,,,,");  
  }  
 if(PORTA.F1==0){   delay_ms(100);  
  if (UART1_Tx_Idle() == 1)  
   UARt1_Write_Text(",,,,,,,,,,,");  
 UART1_Write('(');  
  UART1_Write('B');  
  UART1_Write(')');  
   UARt1_Write_Text(",,,,,,,,,,,");  
  }  
 if(PORTA.F2==0){  delay_ms(100);  
  if (UART1_Tx_Idle() == 1)  
  UARt1_Write_Text(",,,,,,,,,,,");  
 UART1_Write('(');  
  UART1_Write('C');  
  UART1_Write(')');  
   UARt1_Write_Text(",,,,,,,,,,,");  
  }  
  if(PORTA.F3==0){  delay_ms(100);  
  if (UART1_Tx_Idle() == 1)  
   UARt1_Write_Text(",,,,,,,,,,,");  
 UART1_Write('(');  
  UART1_Write('D');  
  UART1_Write(')');  
   UARt1_Write_Text(",,,,,,,,,,,");  
  }  
 }  
 } 

# Receiver :

 





char txt[16];
char chk;
int i=0,ckop=0;
void main() {
ADCON1=0x0E;                  // Configure RE1 pin as input
CMCON=7;
for(i=0;i<16;i++){txt[i]=' ';}
    TRISB.F3=0;
      TRISB.F2=0;               // Initialize ADC
       TRISB.F1=0;
        TRISB.F0=0;

    UART1_Init(2400);
         delay_ms(200);                       // Initialize LCD

  while(1){
   ckop=2;
    if (UART1_Data_Ready() == 1) {

 chk = UART1_Read();
   if(chk=='('){
 for(i=0;i<16;i++){txt[i]=' ';}
   chk=  ' ';
 UART1_Read_Text(txt,")",2);    // reads text until 'enter' is found
   if(txt[0]=='A'){
  PORTB.F0=1;
  PORTB.F1=0;
  PORTB.F2=0;
  PORTB.F3=0;
  }
      if(txt[0]=='B'){
  PORTB.F0=0;
  PORTB.F1=1;
  PORTB.F2=0;
  PORTB.F3=0;
  }
  
     if(txt[0]=='C'){
  PORTB.F0=0;
  PORTB.F1=0;
  PORTB.F2=1;
  PORTB.F3=0;
  }
  if(txt[0]=='D'){
  PORTB.F0=0;
  PORTB.F1=0;
  PORTB.F2=0;
  PORTB.F3=0;
  }
  
  }
  }




}
}

Proteus Circuit:

Now just complete the circuit as I have given below .

Microcontroller Project : RF 433 MHz ( Wireless Radio Frequency ) Module Controlled LED Switching using Pic Microcontroller

Microcontroller Project : RF 433 MHz ( Wireless Radio Frequency ) Module Controlled LED Switching using Pic Microcontroller

Result :

Microcontroller Project : RF 433 MHz ( Wireless Radio Frequency ) Module Controlled LED Switching using Pic Microcontroller

Microcontroller Project : RF 433 MHz ( Wireless Radio Frequency ) Module Controlled LED Switching using Pic Microcontroller

Watch Real Life Video :

RF Module(Proteus)

Download This Project(Google Drive)

Thank You!

RF 433 MHz (Wireless Radio Frequency) Communication Between two Microcontroller [Step By Step Tutorial ]

RF Modules are popularly used in the remote control system. In  Quadcopter, Robot remote control, Industrial remote control, telemetry and remote sensing etc.  Get more details here RF_Wiki

RF module interfacing tutorial

RF Module :

RF Module means Wireless Radio Frequency Module. RF module consists of two units. One Transmitter unit and another is Receiver unit. Basically, RF modules are used to building a wireless connection between two points. We can easily communicate over  300-500m distance through RF module . in this tutorial we are using RF Module at the 433Mhz frequency and it supports baud rate 9600. Although didn't try this. In this tutorial, I will use baud rate2400.

Baud Rate [Wikipedia]

We will use UART  communication to interface RF Module with microcontroller. As we did previously in Bluetooth Interfacing with Pic Microcontroller tutorial. Now let's take a look on RF Transmitter and Receiver respectively .

RF Transmitter :

RF Module ( Wireless Radio Frequency )Transmitter_Tx

max232 433mhz module

RF Receiver :

RF 433 MHz (Wireless Radio Frequency) Communication Between two Microcontroller [Step By Step Tutorial ]

RF Module ( Wireless Radio Frequency ) Receiver Pinout

MikroC Code :

Now open MikroC and Create a new Project .If you are an expert you don't have to follow this steps .

Mikro C Library Funtions :

UARTx_Init:  This function will initialize USART option of  Microcontroller with Baud rate . We will use baud rate 2400 . The code will be look like this :

 UART1_Init(2400);

UARTx_Data_Ready: This checks if it is available to read or transmit data .

UARTx_Read_Text: To read text data .Look at the example .

if (UART1_Data_Ready() == 1) {

UART1_Read_Text(  txt,  ")" , 2); }

This is checking if data is available to read . ")" . The txt char array variable will be being stored until the ")" will be found . 2 means to try for 2 times . So , I think our text should not be longer than 2 character .

UARTx_Write_Text: This will send text data . Look at the example :

if (UART1_Tx_Idle() == 1) {// this will check , if the last data transmission is completed

 UART1_Write_Text("button2");
 }

UARTx_Write: This will send char data . Look at the example :

if (UART1_Tx_Idle() == 1) {// this will check , if the last data transmission is completed

 UART1_Write( '(' );
 }

 

Reducing Noise :

To reduce noise, we will use a trick. Before reading the data text we will keep a function and this will check the first character. If the character will be '(', it will be checked by an if statement. Finally read text function will be performed until the char  ')' will be found. That means microcontroller will show us only the text between '(' and ')'.

Please follow the example:

If we send  (A) , Lcd will show "A" . If we send (B) , we will get "B" . Unless we cant get any text output.  If we send "(A" , this will show no output to LCD display.

 Source Code :

# Transmitter :

 char txt[16];  
 char chk;  
 int i=0,ckop=0;  
 void main() {  
 ADCON1=0x0F;         // Configure RE1 pin as input  
 CMCON=7;  
 for(i=0;i<16;i++){txt[i]=' ';}  
   TRISA.F0=1;  
    TRISA.F1=1;        // Initialize ADC  
      TRISA.F2=1;  
      TRISA.F3=1;  
   UART1_Init(2400);  
      delay_ms(200);            // Initialize LCD  
  while(1){  
  if(PORTA.F0==0){  delay_ms(100);  
  if (UART1_Tx_Idle() == 1)  
  UARt1_Write_Text(",,,,,,,,,,,");  
 UART1_Write('(');  
   UART1_Write('A');  
  UART1_Write(')');  
   UARt1_Write_Text(",,,,,,,,,,,");  
  }  
 if(PORTA.F1==0){   delay_ms(100);  
  if (UART1_Tx_Idle() == 1)  
   UARt1_Write_Text(",,,,,,,,,,,");  
 UART1_Write('(');  
  UART1_Write('B');  
  UART1_Write(')');  
   UARt1_Write_Text(",,,,,,,,,,,");  
  }  
 if(PORTA.F2==0){  delay_ms(100);  
  if (UART1_Tx_Idle() == 1)  
  UARt1_Write_Text(",,,,,,,,,,,");  
 UART1_Write('(');  
  UART1_Write('C');  
  UART1_Write(')');  
   UARt1_Write_Text(",,,,,,,,,,,");  
  }  
  if(PORTA.F3==0){  delay_ms(100);  
  if (UART1_Tx_Idle() == 1)  
   UARt1_Write_Text(",,,,,,,,,,,");  
 UART1_Write('(');  
  UART1_Write('D');  
  UART1_Write(')');  
   UARt1_Write_Text(",,,,,,,,,,,");  
  }  
 }  
 }
 

# Receiver :

 // LCD module connections  
 sbit LCD_RS at LATB7_bit;  
 sbit LCD_EN at LATB6_bit;  
 sbit LCD_D4 at LATB5_bit;  
 sbit LCD_D5 at LATB4_bit;  
 sbit LCD_D6 at LATB3_bit;  
 sbit LCD_D7 at LATB2_bit;  
 sbit LCD_RS_Direction at TRISB7_bit;  
 sbit LCD_EN_Direction at TRISB6_bit;  
 sbit LCD_D4_Direction at TRISB5_bit;  
 sbit LCD_D5_Direction at TRISB4_bit;  
 sbit LCD_D6_Direction at TRISB3_bit;  
 sbit LCD_D7_Direction at TRISB2_bit;  
 // End LCD module connections  
 char txt[16];  
 char chk;  
 int i=0,ckop=0;  
 void main() {  
 ADCON1=0x0E;         // Configure RE1 pin as input  
 CMCON=7;  
 for(i=0;i<16;i++){txt[i]=' ';}  
  Lcd_Init();  
   UART1_Init(2400);  
      delay_ms(200);            // Initialize LCD  
  Lcd_Cmd(_LCD_CLEAR);        // Clear display  
  Lcd_Cmd(_LCD_CURSOR_OFF);     // Cursdhhdor off  
   Lcd_Cmd(_LCD_CLEAR);  
  Lcd_Out(1, 4, "Welcome");  
  Lcd_Out(2, 2, "pictutorial.net");  
  delay_ms(1500);  
   Lcd_Cmd(_LCD_CLEAR);  
   Lcd_Out(1, 2, "Received Data");  
  while(1){  
   ckop=2;  
 if (UART1_Data_Ready() == 1){  
  chk = UART1_Read();  
  for(i=0;i<16;i++){txt[i]=' ';}  
      if(chk=='('){  
  UART1_Read_Text(txt,")",2);  // reads text until 'enter' is found  
  Lcd_Cmd(_LCD_CLEAR);  
  Lcd_Out(1, 2, "Received Data");  
  Lcd_Out(2,1,txt);  
  delay_ms(500);  
  }  
  }  
 }  
 }

Proteus Circuit:

How to Create a New Project in Proteus 8_Step1

How to Create a New Project in Proteus 8_Step2

How to Create a New Project in Proteus 8_Step3

How to Pick parts from Proteus library

How to find Power, Ground etc

Now just complete the circuit as I have given below.

RF 433 MHz (Wireless Radio Frequency) Communication Between two Microcontroller [Step By Step Tutorial ]

Result :

RF 433 MHz (Wireless Radio Frequency) Communication Between two Microcontroller [Step By Step Tutorial ]

RF Module ( Wireless Radio Frequency ) Controlled Simulation

Watch Real Life Video :

MODULO RF(PROTEUS)

  Download Link(Google Drive)

Thank You!

Bluetooth Based Temperature Meter Project using Microcontroller and MikroC USART Terminal

In this project , we will measure surroundings temperature and it will be shown at MikroC USART Terminal . First of all we need to set up LM35  sensor with pic microcontroller and an ADC register will take data from the temperature sensor . After calculating the temperature in centigrade  it will be sent to  our computer's MikroC USART terminal through Bluetooth[HC-06] . That is the basic concepts of this project.

Bluetooth Based Temperature Meter Project using Microcontroller

We will need an ADC Converter so that microcontroller can read the temperature .

ADC [Analog to Digital Converter]:

ADCON1 Register

Basically ADC is like as voltage divider . According to voltage It produce output .
bit 5 : VCFG0: Voltage Reference Configuration bit (VREF- source)
1 = VREF- (AN2)
0 = VSS or 0 volt

bit 4 :VCFG0: Voltage Reference Configuration bit (VREF+ source)
1 = VREF+ (AN3)
0 = VDD or 5volt

We will set  VCFG0[bit 5]=0and VCFG0[bit4]=0 . So we will get highest value 5volt[1023] and lowest value 0volt[0].The ADCON1 is a 10 bit register that means  (2 to the power 10) is it's highest counting capacity and the result is 1024 . So this register can count from 0 to 1023 . When 0 volt , we get reading at RA0 pin  0 .When 5 volt , we get reading at RA0 pin 1023. It means 5volt equivalent to 1023 .

 If  1023 reading value    equal   to 5 volt.
So 1      reading value    equal   to  5/1023 volt
So 'read_val'  reading  value   equal  to (5/1023)*read_val .volt .
As we know LM35 reading can be changed  with  0.01 v per degree centigrade change , the temperature calculation should be like that :
    0.01 volt   for     1      degree centigrade Temperature
so  1     ,,       ,,  (1/0.01)   ,,         ,,              ,,

and (5/1023)*read_val    volt    for  [{(5/1023)*read_val }/0.01]  degree centigrade Temperature .

Mikro C Library Funtions :

UARTx_Init:  This function will initialize USART option of  Microcontroller with Baud rate . We will use baud rate 38400 . The code will be look like this :

 UART1_Init(38400);

UARTx_Data_Ready: This will check if it is available to read or transmit data .

UARTx_Read_Text: To read text data .Look at the example .

if (UART1_Data_Ready() == 1) {

UART1_Read_Text(  txt,  ")" , 13); }

This is checking if data is available to read . ")" means , txt car array variable will be being stored until the ")" will found . 13 means to try for 13 times . So , i think our text should not be longer than 11 character .

UARTx_Write_Text: This will send text data . Look at the example :

if (UART1_Tx_Idle() == 1) {// this will check , if the last data transmission is completed

 UART1_Write_Text("button2");
 }

Recommended: How to Interface Bluetooth Module (HC-06) with PIC Microcontroller [Step by Step Picture]

Circuit :

Bluetooth Based Temperature Meter Project using Microcontroller and MikroC USART Terminal

Source Code :

 char txt[8];  
 double chk;  
 int i=0,ckop=0;  
 void main() {  
 ADCON1=0x0E;         // Configure RE1 pin as input  
 CMCON=7;  
 for(i=0;i<16;i++){txt[i]=' ';}  
   TRISA.F3=1;  
    TRISA.F4=1;        // Initialize ADC  
 Adc_Init();  
   UART1_Init(38400);  
      delay_ms(200);            // Initialize LCD  
  while(1){  
  chk=Adc_Read(0);  
  chk=(chk*5)/1023;  
  chk=chk/0.01;  //10mV == 1 degree
  inttostr(chk,txt);  
  UART1_Write_Text(" Temperature:");  
  UART1_Write_Text(txt);  
  UART1_Write_Text(" \n");  
  delay_ms(6000);  
 }  
 }  

Result:

Download This Project

Thank You!

 

Bluetooth Module (HC-06) Interfacing with PIC Microcontroller [Step by Step Picture]

Bluetooth device has been becoming very popular for wireless communication . Bluetooth is a device that helps you to communicate with other through wireless connection . I am not going to describe about Bluetooth technology . If you have more interest about it , please follow the link of wikipedia Link.

In this tutorial , i will show you how to interface Bluetooth module with pic microcontroller . I am using HC-06 Bluetooth Module and PIC 18f2550 microcontroller for this purpose .

 

We will use USART to make connection between pic18f2550 and HC-06 . So, here is an important thing Baud Rate . This bluetooth module supports 38400 Baud Rate . Actually i don't have much knowledge about Baud Rate . All i know , it's a Symbol rate and differs from bit rate. Higher baud rate makes higher speed of transmission and connection speed. I had tried to understand it clearly from wikipedia , but i failed to completely understand . If you would like to know about Baud Rate , please try these links.

 Baud Rate [Wikipedia]

Baud Rate[MathWorks]

Baud Rate can be changed using  "AT Command"  like GSM Module. I tried , but i didn't get any impact . I am giving another link if you would like to change it . I think  Baud Rate 38400 is fine , i didn't change it . 

How to Change Baud Rate

I think , it's not very essential and that's my personal opinion . Now lets start and take a look at the picture :

HC-06 Bluetooth Module

HC-06 Bluetooth Module [Details] :

Default password: 1234
Baud rate: 38400
Dimensions: 1.73 in x 0.63 in x 0.28 in (4.4 cm x 1.6 cm x 0.7 cm)
PIN OUT
PIN DESCRIPTION
1 KEY
2 VCC
3 GND
4 TXD
5 RXD

MikroC Project :

Now open MikroC and Create a new Project .If you are an expert you don't have to follow this steps .

Note :

Our microcontroller will only transmits and receives data from HC-06 . For this purpose we will use UART of MikroC . As we did in serial communication. PIC18f2550 transmitted text data and that was taken by our computer and PIC18f2550 also received data text from computer. That was the basic idea. Here we are using HC-06 instead of computer. 

Mikro C Library Funtions :

UARTx_Init:  This function will initialize USART option of  Microcontroller with Baud rate . We will use baud rate 38400 . The code will be look like this :

 UART1_Init(38400);

UARTx_Data_Ready: This will check if it is available to read or transmit data .

UARTx_Read_Text: To read text data .Look at the example .

if (UART1_Data_Ready() == 1) {

UART1_Read_Text(  txt,  ")" , 13); }

This is checking if data is available to read . ")" means , txt car array variable will be being stored until the ")" will found . 13 means to try for 13 times . So , i think our text should not be longer than 11 character .

UARTx_Write_Text: This will send text data . Look at the example :

if (UART1_Tx_Idle() == 1) {// this will check , if the last data transmission is completed

 UART1_Write_Text("button2");
 }

Reducing Noise :

To reduce noise , we will use a trick . Before reading the data text we will keep a function and this will check  first character . If the character is '(' , it will be checked by an if statement. Finally read text function will be performed until the char  ')' will be found. That means microcontroller will show us only the text between '(' and ')' . Please follow the example :

If we send  (Omnia) , Lcd will show "Omnia" . If we send (PinkFloyd) , we will get "PinkFloyd" . Unless we cant get any text output.  If we send "(fee ra huri" , this will show no output .

Source Code :

 // LCD module connections  





 sbit LCD_RS at LATB7_bit;  
 sbit LCD_EN at LATB6_bit;  
 sbit LCD_D4 at LATB5_bit;  
 sbit LCD_D5 at LATB4_bit;  
 sbit LCD_D6 at LATB3_bit;  
 sbit LCD_D7 at LATB2_bit;  
 sbit LCD_RS_Direction at TRISB7_bit;  
 sbit LCD_EN_Direction at TRISB6_bit;  
 sbit LCD_D4_Direction at TRISB5_bit;  
 sbit LCD_D5_Direction at TRISB4_bit;  
 sbit LCD_D6_Direction at TRISB3_bit;  
 sbit LCD_D7_Direction at TRISB2_bit;  
 // End LCD module connections  
 char txt[16];  
 char chk;  
 int i=0,ckop=0;  
 void main() {  
 ADCON1=0x0E;         // Configure RE1 pin as input  
 CMCON=7;  
 for(i=0;i<16;i++){txt[i]=' ';}  
   TRISA.F3=1;  
    TRISA.F4=1;        // Initialize ADC  
      TRISA.F5=1;  
      TRISC.F0=1;  
  Lcd_Init();   
   UART1_Init(38400);  
      delay_ms(200);            // Initialize LCD  
  Lcd_Cmd(_LCD_CLEAR);        // Clear display  
  Lcd_Cmd(_LCD_CURSOR_OFF);     // Cursdhhdor off  
   Lcd_Cmd(_LCD_CLEAR);  
  Lcd_Out(1, 4, "Welcome");  
  Lcd_Out(2, 2, "pictutorial.net");  
  delay_ms(1500);  
   Lcd_Cmd(_LCD_CLEAR);  
   Lcd_Out(1, 2, "Received Data");  
  while(1){  
   ckop=2;  
 if (UART1_Data_Ready() == 1){  
  chk = UART1_Read();  
  for(i=0;i<16;i++){txt[i]=' ';}  
  }  
   if(PORTA.F3==0){  
    delay_ms(1000);  
  if (UART1_Tx_Idle() == 1 && ckop==2) {  
  UART1_Write_Text("button1");  
  }  
  ckop=4;  
  }  
   if(PORTA.F4==0){  
      delay_ms(1000);  
  if (UART1_Tx_Idle() == 1 && ckop==2) {  
  UART1_Write_Text("button2");  
  }  
   ckop=4;  
  }  
  if(PORTA.F5==0){  
  UART1_Write_Text("AT+BAUD4");  
  }  
  if(PORTC.F0==0){  
  UART1_Write_Text("AT+BAUD6");  
  }  
      if(chk=='('){  
  UART1_Read_Text(txt,")",13);  // reads text until 'enter' is found  
  Lcd_Cmd(_LCD_CLEAR);  
  Lcd_Out(1, 2, "Received Data");  
  Lcd_Out(2,1,txt);  
  delay_ms(500);  
   for(i=0;i<16;i++){txt[i]=' ';}  
  }  
 }  
 }  

Now Save The Hex File

Circuit Diagram :

Circuit

Practical

MikroC USART Terminal Set Up :

Result