How To Make Arduino As Standalone GPS Receiver With 16×2 LCD- (Part 28/49)

Fig. 6: Pin Out Of Xbee Module

The code written for this project on Arduino reads the serial data from the GPS module using the serial communication functions provided by the Arduino library. The functions like Serial.begin() which helps to initialize the serial port with a given baud rate, Serial.write() to send a data to the serial port, Serial.available() and Serial.read() functions to read data from the serial port are used in this project and they are already discussed in previous projects on how to do serial communication with the Arduino, how to send and receive serial data using arduino and how to do serial debugging with the Arduino.  As the code reads the data from the GPS module it looks for a particular sentence which consists of the latitude and longitude details and displays the latitude and longitude in a readable format in the 16*2 LCD. The method of getting the required latitude and longitude data from the NMEA format output from the GPS is explained in the previous project on how to interface the Arduino with 16*2 LCD.

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/*============================ EG LABS ===================================//


 Demonstration on how to use PS2 MOUSE with an arduino board

 The circuit:

 LCD:

 * LCD RS pin to digital pin 12

 * LCD Enable pin to digital pin 11

 * LCD D4 pin to digital pin 7

 * LCD D5 pin to digital pin 6

 * LCD D6 pin to digital pin 5

 * LCD D7 pin to digital pin 4

 * LCD R/W pin to ground

 * 10K resistor:

 * ends to +5V and ground

 * wiper to LCD pin 3

 * LED anode attached to digital output 9

 * LED cathode attached to ground through a 1K resistor

 

 GPS:

 TX PIN OF GPS TO RX1 PIN OF ARDUINO

 SHORT THE GROUND PINS OF ARDUINO AND GPS


============================== EG LABS ===================================*/


#include <LiquidCrystal.h>


// initialize the library with the numbers of the interface pins

LiquidCrystal lcd(12, 11, 7, 6, 5, 4);



// give the pin a name:

int led = 9;

// incoming serial byte

int inByte = 0;         


void setup()

{

   // set up the lcd's number of columns and rows: 

  lcd.begin(16, 2);

  lcd.print("ENGINEERS GARAGE");

  lcd.setCursor(0, 1);

  lcd.print(" GPS  INTERFACE ");

  

  // initialize the led pin as an output.

  pinMode ( led, OUTPUT );  

  

  // start serial port at 9600 bps

  // wait for a while till the serial port is ready

  delay ( 3000 );

  Serial.begin(4800);

  digitalWrite( led, HIGH );       

}


void loop ()

{ 

//==================== searching for "GG" ===================//

    do

    {

        do

        {

            while ( !Serial.available() );    

        } while ( 'G' != Serial.read() );                    // reading a character from the GPS

      

        while(!Serial.available());

    } while ( 'G' != Serial.read() );

//==================== searching for "GG" ===================//


//============== seeking for north cordinate ==============//

    do

    {

        while ( !Serial.available() );    

    } while ( ',' != Serial.read() );                        // reading a character from the GPS


    do

    {

        while ( !Serial.available() );    

    } while ( ',' != Serial.read() );

//============== seeking for north cordinate ==============//


//============== printing the north cordinate ===============//

    lcd.clear();

    lcd.print(" N: ");

    do

    {

        while ( !Serial.available() ); 

        inByte = Serial.read();                              // reading a character from the GPS

        lcd.write ( inByte );                                // printing the Latitude

    } while ( ',' != inByte );

//============== printing the north cordinate ===============//


//============== seeking for east cordinate ==============//

    do

    {

        while ( !Serial.available() );    

    } while ( ',' != Serial.read() );                       // reading a character from the GPS

//============== seeking for east cordinate ==============//


//============== printing the east cordinate ===============//

    lcd.setCursor(0, 1);

    lcd.print(" E: ");

    do

    {

        while ( !Serial.available() ); 

        inByte = Serial.read();                            // reading a character from the GPS

        lcd.write ( inByte );                              // printing the Longitude

    } while ( ',' != inByte );

//============== printing the east cordinate ===============//


    delay ( 1000 );

}

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• Arduino Pro Mini
• LCD
• LED
• Resistor