// These variables are created at the top of the program (global variables)

char DeviceID[10]="a840418"; //DeviceID or Device identifier in GPSWOX.com

String datastring1="";
String datastring2="";
String datastring3="";
uint8_t datasend[50];    //Storage  longtitude,latitude and altitude

char gps_lon[50]={"\0"};  //Storage GPS info
char gps_lat[20]={"\0"}; //Storage latitude
char gps_alt[20]={"\0"}; //Storage altitude


//This code runs in the loop

  float flat, flon,falt;
  unsigned long age;
  gps.f_get_position(&flat, &flon, &age);
  falt=gps.f_altitude();  //get altitude
  flon == TinyGPS::GPS_INVALID_F_ANGLE ? 0.0 : flon, 6;//save six decimal places
  flat == TinyGPS::GPS_INVALID_F_ANGLE ? 0.0 : flat, 6;
  falt == TinyGPS::GPS_INVALID_F_ANGLE ? 0.0 : falt, 2;//save two decimal places
  datastring1 +=dtostrf(flat, 0, 6, gps_lat);
  datastring2 +=dtostrf(flon, 0, 6, gps_lon);
  datastring3 +=dtostrf(falt, 0, 2, gps_alt);
  if(flon!=1000.000000)
  {
  strcat(gps_lon,",");
  strcat(gps_lon,gps_lat);
  strcat(gps_lon,",");
  strcat(gps_lon,gps_alt);
  strcat(gps_lon,",");
  strcat(gps_lon,DeviceID);
  strcat(gps_lon,",");
  strcpy((char *)datasend,gps_lon);//the format of datasend is longtitude,latitude,altitude,DeviceID,
  Serial.println((char *)datasend);

  // send data
  rf95.send(datasend, sizeof(datasend));
  rf95.waitPacketSent();