#include <TinyGPS++.h>
#include <SoftwareSerial.h>
#include "U8glib.h"
U8GLIB_ST7920_128X64 u8g(13, 11, 10, U8G_PIN_NONE);


// Choose two Arduino pins to use for software serial
int RXPin = 2;
int TXPin = 3;
int GPSBaud = 9600;
// Create a TinyGPS++ object
TinyGPSPlus gps;

// Create a software serial port called "gpsSerial"
SoftwareSerial gpsSerial(RXPin, TXPin);


void draw(void) {
  // graphic commands to redraw the complete screen should be placed here
  u8g.setFont(u8g_font_7x13B);
  //u8g.setFont(u8g_font_osb21);
  u8g.drawStr( 0, 10, "Datum:");
    u8g.drawStr( 50, 10,(gps.date.month());
    u8g.drawStr( 60, 10,(gps.date.day());
    u8g.drawStr( 70, 10,(gps.date.year());

  u8g.drawStr(0, 22, "Uhr:");
    u8g.drawStr(50, 22,(gps.time.hour());
    u8g.drawStr(60, 22,(gps.time.minute());
    u8g.drawStr(70, 22,(gps.time.second());

  u8g.drawStr(0, 32, "Lat:");
  u8g.drawStr(50, 32, (gps.location.lat(), 6);

  u8g.drawStr(0, 42, "Long:");
  u8g.drawStr(50, 42, (gps.location.lng(), 6);

  u8g.drawStr(0, 52, "km/h:");
  u8g.drawStr(50, 52, (gps.speed.kmph());

  u8g.drawStr(0, 62, "High:");
  u8g.drawStr(50, 62, (gps.altitude.meters());
}

void setup()
{
  // Start the Arduino hardware serial port at 9600 baud
  Serial.begin(9600);

  // Start the software serial port at the GPS's default baud
  gpsSerial.begin(GPSBaud);
}

void loop()
{
  // This sketch displays information every time a new sentence is correctly encoded.
  while (gpsSerial.available() > 0)
    if (gps.encode(gpsSerial.read()))
      displayInfo();

  // If 5000 milliseconds pass and there are no characters coming in
  // over the software serial port, show a "No GPS detected" error
  if (millis() > 5000 && gps.charsProcessed() < 10)
  {
    Serial.println("No GPS detected");
    while(true);
  }
}

void displayInfo(){
  if (gps.location.isValid())
  {
    Serial.print("Latitude: ");
    Serial.println(gps.location.lat(), 6);
    Serial.print("Longitude: ");
    Serial.println(gps.location.lng(), 6);
    Serial.print("Altitude: ");
    Serial.println(gps.altitude.meters());
  }
  else
  {
    Serial.println("Location: Not Available");
  }

  Serial.print("Date: ");
  if (gps.date.isValid())
  {
    Serial.print(gps.date.month());
    Serial.print("/");
    Serial.print(gps.date.day());
    Serial.print("/");
    Serial.println(gps.date.year());
  }
  else
  {
    Serial.println("Not Available");
  }
  Serial.print("Kmh: ");
  if (gps.speed.kmph())
  {
   Serial.println(gps.speed.kmph());

  }
  else
  {
    Serial.println("Not Available");
  }
  Serial.print("Sat: ");
  if (gps.satellites.value())
  {
   Serial.println(gps.satellites.value());

  }
  else
  {
    Serial.println("Not Available");
  }
  Serial.print("Time: ");
  if (gps.time.isValid())
  {
    if (gps.time.hour() < 10) Serial.print(F("0"));
    Serial.print(gps.time.hour());
    Serial.print(":");
    if (gps.time.minute() < 10) Serial.print(F("0"));
    Serial.print(gps.time.minute());
    Serial.print(":");
    if (gps.time.second() < 10) Serial.print(F("0"));
    Serial.print(gps.time.second());
    Serial.print(".");
    if (gps.time.centisecond() < 10) Serial.print(F("0"));
    Serial.println(gps.time.centisecond());
  }
  else
  {
    Serial.println("Not Available");
  }

  Serial.println();
  Serial.println();
  delay(1000);

   u8g.firstPage();
  do {
    draw();
  } while ( u8g.nextPage() );
}