arduino weather shield with gps I have Arduino Mega and Weather shield and GPS Receiver - GP-635T (50 Channel).

here is my code for GPS

#include &lt;SoftwareSerial.h&gt;
#include &lt;TinyGPS++.h&gt;

TinyGPSPlus gps;

static const int RXPin = 5, TXPin = 4;
SoftwareSerial ss(RXPin, TXPin);

const byte GPS_PWRCTL = 6;

void setup()
{
  Serial.begin(9600);
  ss.begin(9600);

  pinMode(GPS_PWRCTL, OUTPUT);
  digitalWrite(GPS_PWRCTL, HIGH);
}

void loop()
{
  smartdelay(800);
}


And print weather with this code

void printWeather()
{
  Serial.print("lat=");
  Serial.print(gps.location.lat(), 6);
  Serial.print("lat=");
  Serial.print(gps.location.lng(), 6);
  Serial.print("altitude=");
  Serial.print(gps.altitude.meters());
  Serial.print("sats=");
  Serial.print(gps.satellites.value());

  char sz[32];
  Serial.print("date=");
  sprintf(sz, "%02d/%02d/%02d", gps.date.month(), gps.date.day(),gps.date.year());
  Serial.print(sz);

  Serial.print("time=");
  sprintf(sz, "%02d:%02d:%02d", gps.time.hour(), gps.time.minute(), gps.time.second());
  Serial.print(sz);
}


But I see only zero for location and date and time. What should I do?
Until you have the correct baud rate and good satellite reception, many fields will be zero or empty.  I wrote a diagnostic program for NeoGPS that will try different baud rates and confirm that the GPS device is functioning.  The example program is in this directory:

examples/NMEAdiagnostic


Installation instructions are here.

If you're inside, you may not be able to receive anything.  Move next to a window or go outside.