GPS sensor interface with ESP8266 using Blynk IoT cloud

 

 Circuit diagram:

Source Code:

#include <TinyGPS++.h>

#include <SoftwareSerial.h>

#define BLYNK_PRINT Serial

#include <ESP8266WiFi.h>

#include <BlynkSimpleEsp8266.h>

static const int RXPin = 4, TXPin = 5;   // GPIO 4=D2(conneect Tx of GPS) and GPIO 5=D1(Connect Rx of GPS

static const uint32_t GPSBaud = 9600; //if Baud rate 9600 didn't work in your case then use 4800

TinyGPSPlus gps; // The TinyGPS++ object

WidgetMap myMap(V0);  // V0 for virtual pin of Map Widget

SoftwareSerial ss(RXPin, TXPin);  // The serial connection to the GPS device

BlynkTimer timer;

float spd;       //Variable  to store the speed

float sats;      //Variable to store no. of satellites response

String bearing;  //Variable to store orientation or direction of GPS

char auth[] = "**************";              //Your Project authentication key

char ssid[] = "*****";                                       // Name of your network (HotSpot or Router name)

char pass[] = "*******";                                      // Corresponding Password

//unsigned int move_index;         // moving index, to be used later

unsigned int move_index = 1;       // fixed location for now

  

void setup()

{

  Serial.begin(115200);

  Serial.println();

  ss.begin(GPSBaud);

  Blynk.begin(auth, ssid, pass, "blynk.cloud", 80);

  timer.setInterval(5000L, checkGPS); // every 5s check if GPS is connected, only really needs to be done once

}

void checkGPS(){

  if (gps.charsProcessed() < 10)

  {

    Serial.println(F("No GPS detected: check wiring."));

      Blynk.virtualWrite(V4, "GPS ERROR");  // Value Display widget  on V4 if GPS not detected

  }

}

void loop()

{

    while (ss.available() > 0) 

    {

      // sketch displays information every time a new sentence is correctly encoded.

      if (gps.encode(ss.read()))

        displayInfo();

  }

  Blynk.run();

  timer.run();

}

void displayInfo()

{ 

  if (gps.location.isValid() ) 

  {    

    float latitude = (gps.location.lat());     //Storing the Lat. and Lon. 

    float longitude = (gps.location.lng()); 

    

    Serial.print("LAT:  ");

    Serial.println(latitude, 6);  // float to x decimal places

    Serial.print("LONG: ");

    Serial.println(longitude, 6);

    Blynk.virtualWrite(V1, String(latitude, 6));   

    Blynk.virtualWrite(V2, String(longitude, 6));  

    myMap.location(move_index, latitude, longitude, "GPS_Location");

    spd = gps.speed.kmph();               //get speed

       Blynk.virtualWrite(V3, spd);

       Serial.print("Speed: ");

       Serial.println(spd);

       sats = gps.satellites.value();    //get number of satellites

       Blynk.virtualWrite(V4, sats);

       bearing = TinyGPSPlus::cardinal(gps.course.value()); // get the direction

       Blynk.virtualWrite(V5, bearing);                   

  }

  

 Serial.println();

}