трекер gps signal not found

Трекер gps signal not found

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A Compact Arduino GPS/NMEA Parser

TinyGPS is designed to provide most of the NMEA GPS functionality I imagine an Arduino user would want – position, date, time, altitude, speed and course – without the large size that seems to accompany similar bodies of code.  To keep resource consumption low, the library avoids any mandatory floating point dependency and ignores all but a few key GPS fields.

To use, simply create an instance of an object like this:


You can then query the object to get various tidbits of data. To test whether the data returned is stale, examine the (optional) parameter “fix_age” which returns the number of milliseconds since the data was encoded.



  • chars – the number of characters fed to the object
  • sentences – the number of valid $GPGGA and $GPRMC sentences processed
  • failed_checksum – the number of sentences that failed the checksum test

Integral values


Using Floating Point


Date/time cracking

For more convenient access to date/time use this:

Establishing a fix

TinyGPS objects depend on an external source, i.e. its host program, to feed valid and up-to-date NMEA GPS data. This is the only way to make sure that TinyGPS’s notion of the “fix” is current. Three things must happen to get valid position and time/date:

  1. You must feed the object serial NMEA data.
  2. The NMEA sentences must pass the checksum test.
  3. The NMEA sentences must report valid data. If the $GPRMC sentence reports a validity of “V” (void) instead of “A” (active), or if the $GPGGA sentence reports fix type “0″ (no fix) then those sentences are discarded.


Interfacing with Serial GPS

Library Version


Resource Consumption



Change Log

  1. initial version
  2. << streaming, supports $GPGGA for altitude, floating point inline functions
  3. also extract lat/long/time from $GPGGA for compatibility with devices with no $GPRMC
  4. bug fixes
  5. API re-org, attach separate fix_age’s to date/time and position.
  6. Prefer encode() over operator<<. Encode() returns boolean indicating whether TinyGPS object has changed state.
  7. Changed examples to use NewSoftSerial in lieu of AFSoftSerial; rearranged the distribution package.
  8. Greater precision in latitude and longitude.  Angles measured in 10-5 degrees instead of 10-4 as previously.  Some constants redefined.
  9. Minor bug fix release: the fix_age parameter of get_datetime() was not being set correctly.
  10. Added Maarten Lamers’ distance_to() as a static function.
  11. Arduino 1.0 compatibility
  12. Added satellites(), hdop(), course_to(), and cardinal()
  13. Improved precision in latitude and longitude rendering. get_position() now returns angles in millionths of a degree.


memBrad Burleson

All input is appreciated.

Mikal Hart

Source: http://arduiniana.org/libraries/TinyGPS/

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Видео по фразе трекер gps signal not found

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Как настроить GPS трекер BZ31
опубликовано: 15.08.2016

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