I want to get location from 3 different GPS modules which placed 1m apart from each other. Also 1 16gb SDHC microSD card with SD card shield. All of them are assembled on arduino mega 2560.
Some of my components will arrive in 4 days. So I just wanted to know will this code work for the following circuit diagram.
Please feel free to correct the circuit diagram as well.
I am open for discussions, Thank You.
#include <SPI.h>
#include <SD.h>
#include <TinyGPS++.h>
#include <SoftwareSerial.h>
File myFile;
int GPSBaud = 9600;
uint8_t csPin = 53;
String filename = "GPS_LOG";
char gps1[4] = "GPS1", gps2[4] = "GPS2", gps3[4] = "GPS3";
String Latitude, Longitude, Altitude, day, month, year, hour, minute, second, Date, Time, Data, senosrNo;
TinyGPSPlus gps;
bool flagSD = true;
int count = 0;
String updatedFileName;
void setup() {
Serial.begin(9600);
while (!Serial) {
;
}
Serial.print("Initializing SD card...");
if(!SD.begin(csPin)) {
Serial.println("initialization failed!");
while (1);
}
Serial.println("initialization done.");
Serial.println("Creating GPS_LOG.csv...");
while(flagSD){
if (SD.exists(filename+".csv")){
count = count+1;
filename = filename + String(count);
}else{
flagSD = false;
}
}
updatedFileName = filename+".csv";
myFile = SD.open(updatedFileName,FILE_WRITE);
if(myFile){
myFile.println( "Latitude, Longitude, Altitude, Date and Time \r\n");
myFile.close();
}else{
Serial.println();
}
Serial1.begin(GPSBaud);
Serial2.begin(GPSBaud);
Serial3.begin(GPSBaud);
}
void loop() {
while(Serial1.available())
if (gps.encode(Serial1.read())){
obtain_data(updatedFileName, gps1);
}
while(Serial2.available())
if (gps.encode(Serial2.read())){
obtain_data(updatedFileName, gps2);
}
while(Serial3.available())
if (gps.encode(Serial3.read())){
obtain_data(updatedFileName, gps3);
}
}
void obtain_data(String filename, char sensor)
{
if (gps.location.isValid())
{
Latitude = gps.location.lat();
Longitude = gps.location.lng();
Altitude = gps.altitude.meters();
}
else
{
Serial.println("Location is not available");
}
if (gps.date.isValid())
{
month = gps.date.month();
day = gps.date.day();
year = gps.date.year();
Date = day + "-" + month + "-" + year;
Serial.println(Date);
}
else
{
Serial.print("Date Not Available");
}
Serial.print("Time: ");
if (gps.time.isValid())
{
if (gps.time.hour() < 10) ;
hour = gps.time.hour();
if (gps.time.minute() < 10);
minute = gps.time.minute();
if (gps.time.second() < 10) ;
second = gps.time.second();
Time = hour + ":" + minute + ":" + second;
Serial.println(Time);
}
else
{
Serial.print("Time Not Available");
}
Data = Date + "," + Time + "," + Latitude + "," + Longitude + "," + Altitude;
Serial.print("Save data for " + String(sensor) + ": ");
Serial.println(Data);
myFile = SD.open(filename, FILE_WRITE);
if (myFile) {
Serial.print("GPS logging to "+ filename + "...");
myFile.println(Data);
myFile.close();
Serial.println("done.");
} else {
Serial.println("error opening " + filename);
}
Serial.println();
//delay(10000);
}
