Arduino Mega + SIM28 GPS

Projects Networking, Protocols, and Devices
1

I'm using sample code to dump out specifically MPH from GPS. It works but the refresh is too slow to keep up. IE: I could be driving and speed up and it lags about 5-10mph and starts catching up.

The GPS I'm using is the Grove GPS with a SIM28 with a default baud rate of 9600. When I use the NeoGPS "NMEAdiagnostic", it returns data saying the baud rate is 9600. If I force it to anything over 9600, I get no data/garbage data.

I used some sample code and am only dumping MPH. How do I get a MUCH QUICKER refresh rate? This thing does 10hz so I would like at least 5hz update at minimum.

#include <NMEAGPS.h>


#include <GPSport.h>

#define gpsPort Serial2

NMEAGPS  gps; // This parses the GPS characters
gps_fix  fix; // This holds on to the latest values

void setup()
{
  DEBUG_PORT.begin(9600);
  while (!Serial)
    ;
  DEBUG_PORT.print( F("NMEAsimple.INO: started\n") );

  gpsPort.begin(9600);
}

//--------------------------

void loop()
{
  while (gps.available( gpsPort )) {
    fix = gps.read();
    DEBUG_PORT.println("MPH=" +  String(fix.speed_mph()));
  }
}
2

A have an Ardusimple simpleRTK2B based GPS system and it only updates every second. You may want to check on how fast your receiver can transmit updates. Just to clarify, I don't mean how fast it can send data (baud rate), I mean it may only be able finish calculating data and then send that data every 10Hz in your case.

3

I dunno.

Looking for someone who has experience with this GPS / Library to see if I'm missing enabling something etc.

4

You can do it without using any GPS library. It's pretty straight forward and you will have more control over the processes.

5

Not really sure what to reply with. lol

Anyone else:
Am I missing something obvious in my sample code that isnt enabling 5hz or 10hz which would allow MUCH QUICKER updates to my speedo?

6

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