racechrono

RaceChrono

• Setup
• GPS configuration for NMEA messages

The lap timer with the cleanest UX currently supported: https://racechrono.com/

• tested with v7.0.10 free (thus satellites view untested) on Android
• BT-SPP is the only option
• GSA+GSV polling at 5 sec

Setup

Open settings from the gear icon in the main page, then add a bluetooth receiver selecting your BonoGPS unit

When you start recording (the round big "start" button) if everything goes well you'll be able to see the constellations of satellites in the dashboard view

When you click on the lower left green "swipe up" icon, you'll be able to see further information about the GPS status

GPS configuration for NMEA messages

Instructions directly from the SW Developer of RaceChrono in the support forum point out here and here

• Sentences need to start with $GP
• Only GGA+RMC or RMC+VTG+ZDA combinations are used
• GSA+GSV are optional
• GBS sentence is not used

This means

• Main Talker ID = GP
• GSA and GSV every 5 seconds, with only GSV restricted to GP