I'm working on a device which takes inputs from a GPS chip and log the Latitude and longitudes in a SD card, everything is working fine when i connects the Arduino mega to the computer and checks the Serial monitor, But when i use battery pack to power the Arduino Mega then the problem comes, The system is not creating a File in SD card and also not logging the data, Here i need to manually press the Reset button on Arduino Mega to start the process from the beginning.
Here is my code
#include <TinyGPS++.h>
#include <SPI.h>
#include <SD.h>
#include <EEPROM.h>
int addr = 0;
TinyGPSPlus gps;
File dataFile;
char abc[32];
char def[32];
char aaa[32];
int dat = 0, v = 0;
float lat0 = 0.0, lat1 = 0.0, lng0 = 0.0, lng1 = 0.0, dis = 0.0;
String kk;
int LED = 5;
int LEDD = 6;
void setup()
{
pinMode(LED, OUTPUT);
pinMode(LEDD, OUTPUT);
Serial.begin(9600);
Serial2.begin(9600);
pinMode(7, INPUT_PULLUP);
if (!SD.begin(53))
{
Serial.println("Card failed");
return;
}
Serial.println("card initialized.");
v = EEPROM.read(0);
v++;
EEPROM.write(0, v);
}
void loop()
{
printInt(gps.satellites.value(), gps.satellites.isValid(), 5);
printInt(gps.hdop.value(), gps.hdop.isValid(), 5);
printFloat(gps.location.lat(), gps.location.isValid(), 11, 6);
printFloat(gps.location.lng(), gps.location.isValid(), 12, 6);
printDateTime(gps.date, gps.time);
printFloat(gps.altitude.meters(), gps.altitude.isValid(), 7, 2);
Serial.println();
smartDelay(1000);
if (millis() > 5000 && gps.charsProcessed() < 10)
Serial.println(F("No GPS data received: check wiring"));
Serial.println(dat);
if (dat == 1)
{
Serial.println("date got1");
kk = String(v) + ".txt";
Serial.println(kk);
dataFile = SD.open(kk, FILE_WRITE);
if (dataFile) {
Serial.println("File created");
dataFile.println(F("<?xml version=\"1.0\" encoding=\"UTF-8\"?>"));
dataFile.println(F("<TrainingCenterDatabase xmlns=\"http://www.garmin.com/xmlschemas/TrainingCenterDatabase/v2\">"));
dataFile.println(F("<Activities>"));
dataFile.println(F("<Activity Sport=\"Other\">"));
Serial.println(F("done 1st part"));
dataFile.println("<Id>");
dataFile.print(String(def));
dataFile.print("T");
dataFile.print(String(abc));
dataFile.print(".000Z");
dataFile.println("</Id>");
dataFile.println("<Lap StartTime=\"");
dataFile.print(String(def));
dataFile.print("T");
dataFile.print(String(abc));
dataFile.print(".000Z\">");
dataFile.println("<Track>");
do {
lat0 = (String(gps.location.lat(), 6)).toFloat();
Serial.println("aquisition doing");
lng0 = (String(gps.location.lng(), 6)).toFloat();
setup();
} while (lat0 == 0.0);
if (lat0 == 0.0)
{
digitalWrite(LED, LOW);
}
else
{
digitalWrite(LED, HIGH);
}
logging();
}
else {
Serial.println("CANT OPEN FILE");
}
}
}
void logging()
{
Serial.println("came in loop 1");
while (1)
{
if (digitalRead(7) == LOW)
endtask();
printDateTime(gps.date, gps.time);
if (millis() > 5000 && gps.charsProcessed() < 10)
Serial.println(F("No GPS data received: check wiring"));
dataFile.println("<Trackpoint>");
dataFile.println("<Time>");
dataFile.print(String(def));
dataFile.print("T");
dataFile.print(String(abc));
dataFile.print(".000Z");
dataFile.print("</Time>");
dataFile.println("<Position>");
{
lat1 = (String(gps.location.lat(), 6)).toFloat();
lng1 = (String(gps.location.lng(), 6)).toFloat();
float distLat = abs(lat0 - lat1) * 111194.9;
float distLong = 111194.9 * abs(lng0 - lng1) * cos(radians((lat0 + lat1) / 2));
dis = dis + sqrt(pow(distLat, 2) + pow(distLong, 2));
Serial.println(dis, 6);
lat0 = lat1;
lng0 = lng1;
}
{
dataFile.print("<LatitudeDegrees>");
dataFile.print(String(lat1, 6));
Serial.println(String(lat1, 6));
dataFile.println("</LatitudeDegrees>");
dataFile.print("<LongitudeDegrees>");
dataFile.print(String(lng1, 6));
Serial.println(String(lng1, 6));
dataFile.println("</LongitudeDegrees>");
dataFile.println("</Position>");
dataFile.print("<AltitudeMeters>");
dataFile.print((String(gps.altitude.meters(), 2)));
dataFile.println("</AltitudeMeters>");
dataFile.println("<DistanceMeters>");
dataFile.println(String(dis, 6));
dataFile.println("</DistanceMeters>");
dataFile.println("</Trackpoint>");
Serial.print("Recorded");
}
def[0] = NULL;
abc[0] = NULL;
smartDelay(1000);
}
}
static void printFloat(float val, bool valid, int len, int prec)
{
if (!valid)
{
while (len-- > 1)
Serial.print('*');
Serial.print(' ');
}
else
{
Serial.print(val, prec);
int vi = abs((int)val);
int flen = prec + (val < 0.0 ? 2 : 1); // . and -
flen += vi >= 1000 ? 4 : vi >= 100 ? 3 : vi >= 10 ? 2 : 1;
for (int i = flen; i < len; ++i)
Serial.print(' ');
}
smartDelay(0);
}
void endtask()
{
dataFile.println("</Track>");
dataFile.println("</Lap>");
dataFile.println("</Activity>");
dataFile.println("</Activities>");
dataFile.println("</TrainingCenterDatabase>");
dataFile.close();
Serial.print("file close");
digitalWrite(LEDD, HIGH);
while (1);
}
static void printInt(unsigned long val, bool valid, int len)
{
char sz[32] = "*****************";
if (valid)
sprintf(sz, "%ld", val);
sz[len] = 0;
for (int i = strlen(sz); i < len; ++i)
sz[i] = ' ';
if (len > 0)
sz[len - 1] = ' ';
Serial.print(sz);
smartDelay(0);
}
static void printDateTime(TinyGPSDate &d, TinyGPSTime &t)
{
if (!d.isValid())
{
Serial.print(F("********** "));
dat = 0;
}
else
{
sprintf(def, "%02d-%02d-%02d", d.year(), d.month(), d.day());
Serial.print(def);
dat = 1;
}
if (!t.isValid())
{
Serial.print(F("******** "));
}
else
{
sprintf(abc, "%02d:%02d:%02d", t.hour(), t.minute(), t.second());
Serial.print(abc);
sprintf(aaa, "%02d%02d%02d", t.hour(), t.minute(), t.second());
Serial.print(aaa);
}
smartDelay(0);
}
static void smartDelay(unsigned long ms)
{
unsigned long start = millis();
do
{
while (Serial2.available())
gps.encode(Serial2.read());
} while (millis() - start < ms);
}
Please Help.
Thanks
