Soil Moisture Meter Project Using Microcontroller

Microcontroller Based Soil Moisture Meter

Grove - Moisture Sensor :

Basically grove moisture sensor is used to measuring the moisture of the soil. It also can be used as water sensor. We can water  plants according to its humidity by using the sensor .  Look at the sensor pictures and its pin out.

Soil Moisture Meter Project Using Microcontroller

Basic Concepts:

  The Moisture sensor will be connected with a pic microcntroller and a LCD display will also be connected with microcontroller . Moisture sensor will provide voltage into microcontroller's RA1 pin(ADC) according to the humidity of soil . It will provide reading from (0-721). After calculating the percentage and soil condition , the microcontroller sends out that data to the LCD Display . That's the basic concept .

ADC(Analog to Digital Converter ) :

We need a basic knowledge about ADC . Let's  take a look at here :

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 result is 1024 . So this register can count from 0 to 1023 . When 0 volt , we get reading at RA1 pin  0 .When 5 volt , we get reading at RA1 pin 1023. It means 5volt equivalent to 1023 .

As we know in water the sensor provide 722 data and  absolutely it should be 100% .
If   reading 744 means 100 % 
So     ""        1     ""      (100/744) %
and   reading % of source reading will be (100/744)*source %

MikroC Source Code :

 


 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  
 double source=0;   
 int view=0;  
 char txt[6];  
 void main() {  
 ADCON1=0x0D;         // Configure RE1 pin as input  
 CMCON=7;  
 TRISC.F4=0;  
  ADC_Init();            // Initialize ADC  
  Lcd_Init();            // Initialize LCD  
  Lcd_Cmd(_LCD_CLEAR);        // Clear display  
  Lcd_Cmd(_LCD_CURSOR_OFF);     // Cursor off  
     
  while(1){  
  source=Adc_Read(1);  
  source=100*source;  
  source=source/744;  
  inttostr(source,txt);  
  if(source>96){  
  source=100;  
  }  
  if(source>83){  
   Lcd_Cmd(_LCD_CLEAR);  
  Lcd_Out(1,3, "Water!!");  
  Lcd_Out(2,1, "Hum:");  
 Lcd_Out(2,5,txt);  
  Lcd_Chr(2,11,0x25);  
   Lcd_Chr(2,12,' ');  
    Lcd_Chr(2,13,' ');  
     Lcd_Chr(2,14,' ');  
      Lcd_Chr(2,15,' ');  
      Lcd_Chr(2,16,' ');  
    delay_ms(1000);  
  }   
  else if(source>40&&source<=83){  
   Lcd_Cmd(_LCD_CLEAR);  
  Lcd_Out(1,3, "Humid Soil");  
  Lcd_Out(2,1, "Hum:");  
 Lcd_Out(2,5,txt);  
  Lcd_Chr(2,11,0x25);  
   Lcd_Chr(2,12,' ');  
    Lcd_Chr(2,13,' ');  
     Lcd_Chr(2,14,' ');  
      Lcd_Chr(2,15,' ');  
      Lcd_Chr(2,16,' ');  
       PORTC.f4=0; //motor off  
    delay_ms(1000);  
  } else{  
   Lcd_Cmd(_LCD_CLEAR);  
  Lcd_Out(1,3, "Dry Soil");  
  Lcd_Out(2,1, "Hum:");  
 Lcd_Out(2,5,txt);  
  Lcd_Chr(2,11,0x25);  
   Lcd_Chr(2,12,' ');  
    Lcd_Chr(2,13,' ');  
     Lcd_Chr(2,14,' ');  
      Lcd_Chr(2,15,' ');  
      Lcd_Chr(2,16,' ');  
       PORTC.f4=1;  // motor on  
   delay_ms(1000);  
   PORTC.f4=1;  
  }  
 }  
 }  

  Circuit :

Microcontroller Based Soil Moisture Meter circuit

Result:

Soil Moisture Meter Project Using Microcontroller

Practical Video of This Project

Download MikroC Project and images(Google Drive)

 

Thank You!

Gas Leakage Detector Project using Microcontroller and (MQ-9) Gas Sensor

 

Gas Sensor (MQ-9) :

  MQ-9 Gas Sensor is one kind of semiconductor which has very lower conductivity in open air. But in Carbon Monoxide, Methane and LPG gas it has good conductivity. By using ADC of pic microcontroller we can measure it. Let's take a look on MQ-9 sensor .

 

Datasheet of  MQ-9

 

Basic Concepts :

The MQ-9 sensor will be connected with a pic microcntroller and a buzzer will also be connected with microcontroller. When LPG gas will be detected in sensor, it will provide voltage into microcontroller's RA1 pin(ADC). It will provide reading more than 590. At this situation microcontroller will turn on the buzzer and LED. That's the basic concept. 

ADC(Analog to Digital Converter ) :

We need a basic knowledge about ADC. Let's  take a look at here :

ADCON1 Register

Basically ADC works like as a 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 result is 1024. So this register can count from 0 to 1023. When 0 volt, we get reading at RA1 pin  0. When 5 volt, we get reading at RA1 pin 1023. It means 5volt equivalent to 1023 .

 If  5 volt    equal    reading 1023 .
So 1  volt   equal    reading 1023/5  
[When LPG Gas detect MQ-9 Sensor provide more than 2.93 volt at AO Pin]
So 3 volt equal  reading  (1023/5)*2.93 =599 When we get reading 599 at ADC channel, we understand  that sensor detects LPG. So it makes PORTB.F6 pin high and Buzzer turns on .

 MikroC Source Code :

  




double source=0;   
char txt[15];  
 void main() {  
 ADCON1=0x0D;         // Configure RA1 pin as input  
 CMCON=7;  
 TRISB.F6=0;  
  ADC_Init();            
        
  while(1){  
  source=Adc_Read(1);  
  PORTB.F6=0;  
 if(source>600){   
 delay_ms(500);    
 PORTB.F6=1;  
 }  
 }  
 }  

 

Proteus Circuit :

 

 

RESULT:

PRACTICAL VIDEO  YOUTUBE

Download This Project(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

Temperature Meter using Microcontroller and LM35 Temperature Sensor

We can  build a Temperature meter by pic18f2550 microcontroller and we need a temperature sensor . In this project we will use LM35 temperature sensor and it is a popular temperature sensor .Look at the picture which is given below .

The Picture has been taken from internet

LM35 produce different voltage outputs at different temperatures . LM35 increase it's output voltage 10mV or 0.01v  for each degree increment of temperature . That means 0.01 v per degree centigrade. 

Now we need to get a microcontroller as a system to read temperature from sensor . We will use ADC of the microcontroller and the reading will be shown in LCD display . It's the basic idea of the project .

We need a basic knowledge about ADC . Let's  take a look at here :

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 . According to the datasheet 10mV = 1 degree centigrade temperature .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 .

Source Code :

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

double source=0;
int temperature=0;
char txt[15];

void main() {
ADCON1=0x0E;                  // Configure RA0 pin as input
CMCON=7;
TRISB.F0=0;
  ADC_Init();                        // Initialize ADC

  Lcd_Init();                        // Initialize LCD
  Lcd_Cmd(_LCD_CLEAR);               // Clear display
  Lcd_Cmd(_LCD_CURSOR_OFF);          // Cursor off

  Lcd_Out(1, 3, "Temperature");
                  // Different LCD displays have different
  Lcd_Chr(2,12,223);                   //   char code for degree
  Lcd_Chr(2,13,'C');                  // Display "C" for Celsius
  while(1){
 source=Adc_Read(0);
 source=(source*5)/1023;
 source=source/0.01;
if(source>30){       // when temperature goes higher than 30 degree , fan turns on .
PORTB.F0=1;
} 
else{                    // when temperature goes lower than 30 degree , fan remains off .
 PORTB.F0=0;
}
inttostr(source,txt);
Lcd_Out(2,1,txt);



}
}

Circuit :

During temperature lower than 30 degree:

During temperature higher than 30 degree:

This Project's Proteus Simulation in Youtube , Please Watch This:

                             

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