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+/*
+TinyGPS++ - a small GPS library for Arduino providing universal NMEA parsing
+Based on work by and "distanceBetween" and "courseTo" courtesy of Maarten Lamers.
+Suggestion to add satellites, courseTo(), and cardinal() by Matt Monson.
+Location precision improvements suggested by Wayne Holder.
+Copyright (C) 2008-2024 Mikal Hart
+All rights reserved.
+
+This library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Lesser General Public
+License as published by the Free Software Foundation; either
+version 2.1 of the License, or (at your option) any later version.
+
+This library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public
+License along with this library; if not, write to the Free Software
+Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+
+
+
+#ifndef __TinyGPSPlus_h
+#define __TinyGPSPlus_h
+
+#include <inttypes.h>
+#include "Arduino.h"
+#include <limits.h>
+
+#define _GPS_VERSION "1.1.0" // software version of this library
+#define _GPS_MPH_PER_KNOT 1.15077945
+#define _GPS_MPS_PER_KNOT 0.51444444
+#define _GPS_KMPH_PER_KNOT 1.852
+#define _GPS_MILES_PER_METER 0.00062137112
+#define _GPS_KM_PER_METER 0.001
+#define _GPS_FEET_PER_METER 3.2808399
+#define _GPS_MAX_FIELD_SIZE 15
+#define _GPS_EARTH_MEAN_RADIUS 6371009 // old: 6372795
+
+struct RawDegrees
+{
+   uint16_t deg;
+   uint32_t billionths;
+   bool negative;
+public:
+   RawDegrees() : deg(0), billionths(0), negative(false)
+   {}
+};
+
+struct TinyGPSLocation
+{
+   friend class TinyGPSPlus;
+public:
+   enum Quality { Invalid = '0', GPS = '1', DGPS = '2', PPS = '3', RTK = '4', FloatRTK = '5', Estimated = '6', Manual = '7', Simulated = '8' };
+   enum Mode { N = 'N', A = 'A', D = 'D', E = 'E'};
+
+   bool isValid() const    { return valid; }
+   bool isUpdated() const  { return updated; }
+   uint32_t age() const    { return valid ? millis() - lastCommitTime : (uint32_t)ULONG_MAX; }
+   const RawDegrees &rawLat()     { updated = false; return rawLatData; }
+   const RawDegrees &rawLng()     { updated = false; return rawLngData; }
+   double lat();
+   double lng();
+   Quality FixQuality()           { updated = false; return fixQuality; }
+   Mode FixMode()                 { updated = false; return fixMode; }
+
+   TinyGPSLocation() : valid(false), updated(false), fixQuality(Invalid), fixMode(N)
+   {}
+
+private:
+   bool valid, updated;
+   RawDegrees rawLatData, rawLngData, rawNewLatData, rawNewLngData;
+   Quality fixQuality, newFixQuality;
+   Mode fixMode, newFixMode;
+   uint32_t lastCommitTime;
+   void commit();
+   void setLatitude(const char *term);
+   void setLongitude(const char *term);
+};
+
+struct TinyGPSDate
+{
+   friend class TinyGPSPlus;
+public:
+   bool isValid() const       { return valid; }
+   bool isUpdated() const     { return updated; }
+   uint32_t age() const       { return valid ? millis() - lastCommitTime : (uint32_t)ULONG_MAX; }
+
+   uint32_t value()           { updated = false; return date; }
+   uint16_t year();
+   uint8_t month();
+   uint8_t day();
+
+   TinyGPSDate() : valid(false), updated(false), date(0)
+   {}
+
+private:
+   bool valid, updated;
+   uint32_t date, newDate;
+   uint32_t lastCommitTime;
+   void commit();
+   void setDate(const char *term);
+};
+
+struct TinyGPSTime
+{
+   friend class TinyGPSPlus;
+public:
+   bool isValid() const       { return valid; }
+   bool isUpdated() const     { return updated; }
+   uint32_t age() const       { return valid ? millis() - lastCommitTime : (uint32_t)ULONG_MAX; }
+
+   uint32_t value()           { updated = false; return time; }
+   uint8_t hour();
+   uint8_t minute();
+   uint8_t second();
+   uint8_t centisecond();
+
+   TinyGPSTime() : valid(false), updated(false), time(0)
+   {}
+
+private:
+   bool valid, updated;
+   uint32_t time, newTime;
+   uint32_t lastCommitTime;
+   void commit();
+   void setTime(const char *term);
+};
+
+struct TinyGPSDecimal
+{
+   friend class TinyGPSPlus;
+public:
+   bool isValid() const    { return valid; }
+   bool isUpdated() const  { return updated; }
+   uint32_t age() const    { return valid ? millis() - lastCommitTime : (uint32_t)ULONG_MAX; }
+   int32_t value()         { updated = false; return val; }
+
+   TinyGPSDecimal() : valid(false), updated(false), val(0)
+   {}
+
+private:
+   bool valid, updated;
+   uint32_t lastCommitTime;
+   int32_t val, newval;
+   void commit();
+   void set(const char *term);
+};
+
+struct TinyGPSInteger
+{
+   friend class TinyGPSPlus;
+public:
+   bool isValid() const    { return valid; }
+   bool isUpdated() const  { return updated; }
+   uint32_t age() const    { return valid ? millis() - lastCommitTime : (uint32_t)ULONG_MAX; }
+   uint32_t value()        { updated = false; return val; }
+
+   TinyGPSInteger() : valid(false), updated(false), val(0)
+   {}
+
+private:
+   bool valid, updated;
+   uint32_t lastCommitTime;
+   uint32_t val, newval;
+   void commit();
+   void set(const char *term);
+};
+
+struct TinyGPSSpeed : TinyGPSDecimal
+{
+   double knots()    { return value() / 100.0; }
+   double mph()      { return _GPS_MPH_PER_KNOT * value() / 100.0; }
+   double mps()      { return _GPS_MPS_PER_KNOT * value() / 100.0; }
+   double kmph()     { return _GPS_KMPH_PER_KNOT * value() / 100.0; }
+};
+
+struct TinyGPSCourse : public TinyGPSDecimal
+{
+   double deg()      { return value() / 100.0; }
+};
+
+struct TinyGPSAltitude : TinyGPSDecimal
+{
+   double meters()       { return value() / 100.0; }
+   double miles()        { return _GPS_MILES_PER_METER * value() / 100.0; }
+   double kilometers()   { return _GPS_KM_PER_METER * value() / 100.0; }
+   double feet()         { return _GPS_FEET_PER_METER * value() / 100.0; }
+};
+
+struct TinyGPSHDOP : TinyGPSDecimal
+{
+   double hdop() { return value() / 100.0; }
+};
+
+class TinyGPSPlus;
+class TinyGPSCustom
+{
+public:
+   TinyGPSCustom() {};
+   TinyGPSCustom(TinyGPSPlus &gps, const char *sentenceName, int termNumber);
+   void begin(TinyGPSPlus &gps, const char *_sentenceName, int _termNumber);
+
+   bool isUpdated() const  { return updated; }
+   bool isValid() const    { return valid; }
+   uint32_t age() const    { return valid ? millis() - lastCommitTime : (uint32_t)ULONG_MAX; }
+   const char *value()     { updated = false; return buffer; }
+
+private:
+   void commit();
+   void set(const char *term);
+
+   char stagingBuffer[_GPS_MAX_FIELD_SIZE + 1];
+   char buffer[_GPS_MAX_FIELD_SIZE + 1];
+   unsigned long lastCommitTime;
+   bool valid, updated;
+   const char *sentenceName;
+   int termNumber;
+   friend class TinyGPSPlus;
+   TinyGPSCustom *next;
+};
+
+class TinyGPSPlus
+{
+public:
+  TinyGPSPlus();
+  bool encode(char c); // process one character received from GPS
+  TinyGPSPlus &operator << (char c) {encode(c); return *this;}
+
+  TinyGPSLocation location;
+  TinyGPSDate date;
+  TinyGPSTime time;
+  TinyGPSSpeed speed;
+  TinyGPSCourse course;
+  TinyGPSAltitude altitude;
+  TinyGPSInteger satellites;
+  TinyGPSHDOP hdop;
+
+  static const char *libraryVersion() { return _GPS_VERSION; }
+
+  static double distanceBetween(double lat1, double long1, double lat2, double long2);
+  static double courseTo(double lat1, double long1, double lat2, double long2);
+  static const char *cardinal(double course);
+
+  static int32_t parseDecimal(const char *term);
+  static void parseDegrees(const char *term, RawDegrees &deg);
+
+  uint32_t charsProcessed()   const { return encodedCharCount; }
+  uint32_t sentencesWithFix() const { return sentencesWithFixCount; }
+  uint32_t failedChecksum()   const { return failedChecksumCount; }
+  uint32_t passedChecksum()   const { return passedChecksumCount; }
+
+private:
+  enum {GPS_SENTENCE_GGA, GPS_SENTENCE_RMC, GPS_SENTENCE_OTHER};
+
+  // parsing state variables
+  uint8_t parity;
+  bool isChecksumTerm;
+  char term[_GPS_MAX_FIELD_SIZE];
+  uint8_t curSentenceType;
+  uint8_t curTermNumber;
+  uint8_t curTermOffset;
+  bool sentenceHasFix;
+
+  // custom element support
+  friend class TinyGPSCustom;
+  TinyGPSCustom *customElts;
+  TinyGPSCustom *customCandidates;
+  void insertCustom(TinyGPSCustom *pElt, const char *sentenceName, int index);
+
+  // statistics
+  uint32_t encodedCharCount;
+  uint32_t sentencesWithFixCount;
+  uint32_t failedChecksumCount;
+  uint32_t passedChecksumCount;
+
+  // internal utilities
+  int fromHex(char a);
+  bool endOfTermHandler();
+};
+
+#endif // def(__TinyGPSPlus_h)