How to send and recieve longitude and latitude between 2 arduinos

Projects Programming
1

Im using 2 arduinos sender and reciever, the sender arduino have neo6mv2 a gps module and i want to send the latitude and longitude to second arduino using SoftwareSerial. How do recieve the exact values in the reciever and print the exact value ?

2

Which Arduino boards are you using ?
Is the GPS on Arduino number 1 using SoftwareSerial ?
If not, then how is it connected ?

Why do you need to use 2 Arduinos ?

3

im using arduino uno and yes the gps on arduino 1 is using softwareserial. Im just trying to learn serial communication.

here are the codes:

//code for the sender
#include <SoftwareSerial.h>
#include <TinyGPSPlus.h>

static const int RXpin =4;
static const int TXpin = 3;
static const uint32_t GPSbaud = 9600;

TinyGPSPlus gps;
SoftwareSerial ss(RXpin, TXpin);

SoftwareSerial latGPS(11, 10);
SoftwareSerial lonGPS(9, 8);

float lat, lon;

void setup() {
  Serial.begin(9600);
  ss.begin(GPSbaud);
  lotGPS.begin(9600);
  lonGPS.begin(9600);
}

void loop() {
  gps_read();
  sending_GPS();
}
void gps_read(){
  while(ss.available() > 0){
    if(gps.encode(ss.read())) gps_location();
  }
  if(millis() > 5000 && gps.charsProcessed() < 100){
    Serial.println(F("No GPS detected, check wiring."));
    while(true);
  }
}
void gps_location() {
  Serial.print(F("Location: "));
  if(gps.location.isValid()){
    lat = (gps.location.lat());
    lon = (gps.location.lng());
    Serial.print(lat, 7);
    Serial.print(F(", "));
    Serial.print(lon, 7);
  }
  else Serial.print(F("Invalid"));

  Serial.print(F(" Date: "));
  if(gps.date.isValid()){
    Serial.print(gps.date.month());
    Serial.print(F("/"));
    Serial.print(gps.date.day());
    Serial.print(F("/"));
    Serial.print(gps.date.year());
  }
  else Serial.print(F("Invalid"));

  Serial.println();
}
void sending_GPS(){
  latGPS.write(lat); // i dont know if this is right
  lonGPS.write(lon);
}

//code for the receiver
#include <SoftwareSerial.h>

SoftwareSerial recieveLAT(10, 11); //RX, TX
SoftwareSerial recieveLON(8, 9);
float lat, lon;
void setup() {
  Serial.begin(9600);
  receiveLAT.begin(9600);
  receiveLON.begin(9600);
}

void loop() {  
  //please help what is the code for receiving 
}
4

start there: Serial Input Basics

5

If you are using SoftwareSerial for the GPS then you will not be able to use it to communicate with the second Uno. Only a single instance of SoftwareSerial can be used reliably on an Arduino

You should avoid using hardware Serial (pins 0 and 1) on either Arduino as they are used to upload code to the board and for the Serial monitor, which you will need for debugging

Some solutions :

  • use a different software serial library for the interface to the second Arduino (AltSoftSerial)
  • use an Arduino with more hardware UARTs such as a Mega
  • use a different interface such as SPI or I2C to communicate with the second Arduino
6

Example 5 of Serial input basics demo's how you can send 2 or more float's (and/or other datatypes) across the serial line. Why do you need 2 Arduino's?

7

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