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renatobo / bonogps

A GPS setup to log your track lap times, based on ESP32, with the ability to interface with several mobile phone apps that log your speed and position via Bluetooth Low Energy, Bluetooth or WiFi

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RaceChrono: validate talker id's and NMEA messages

renatobo opened this issue · comments

commented

According to this post, RaceChrono only accepts GPRMC and GPGGA so they can be disabled

Alternatively, adopt the same binary packet format described in
racechrono-ble-diy-device
other info at https://github.com/timurrrr/arduino-RaceChrono

Additional info also at the Tutorial on DIY devices which explains $RC2 and $RC3 formats

commented

From tests with current version 7.0.10

GGA and RMC minimum mandatory

  • GNGGA, GNRMC are supported (combined GPS, Glonass) -> best option, matching the option 'Main Talker ID = 0 System Dependent'
  • GPGGA, GPRMC are supported (combined GPS, Glonass)
  • GL<GGA,RMC> and GA<GGA,RMC> are not supported

GBS

  • it seems ignored -> remove from default

GSV and GSA

  • only GP* supported
  • GNGSV not supported, differently from support for GN in GGA and RMC

This means

  • Disable GBS
  • Change polling GSA and GSV to use GP instead of GN Talker
  • Enable the option "Restrict output to GP SVs only"

New configuration option "racechrono" now holds the true/false status of these optimizations

commented

Open a separate issue for binary protocol support