NeoGPS - RATE and BAUD commands not working

Projects Programming
11

-dev:
No. Was there something wrong with the code I provided?

    gps.send_P( &gpsPort, (const __FlashStringHelper *) baud38400 );

Copy the baud38400 variable declaration too:

    const char baud38400 [] PROGMEM = "PUBX,41,1,3,3,38400,0";

The problem was I didn't realize the first line you gave me also needed the 2nd line added to create the variable. I thought "baud38400" was the actual command, not a variable.

Regarding the rate change w/in Setup, nobody ever told me I could call functions in setup. Putting the void sendUBX code into Setup didn't work well. Whoops.

I just tested the revised code and it works GREAT! At 5Hz and 10Hz the 6m reports centiseconds of 00/20/40/60/80, at 1Hz it shows 00 and refreshes the serial monitor only once per sec as expected.

Here's what I'm sticking with, hopefully it helps provide other people with a shortcut along with the "NeoGPS for Dummies" provided above. :stuck_out_tongue: Thanks again -dev, you're a great guy with great code. This will save me a lot of time dinking around with eeprom, batteries, and connecting the GPS separately.

#include <NMEAGPS.h>
#include <AltSoftSerial.h>

AltSoftSerial gpsPort; // GPS TX to pin 8, GPS RX to pin 9
NMEAGPS gps;
const unsigned char ubxRate1Hz[] PROGMEM = 
{ 0x06,0x08,0x06,0x00,0xE8,0x03,0x01,0x00,0x01,0x00 };
const unsigned char ubxRate5Hz[] PROGMEM =
{ 0x06,0x08,0x06,0x00,200,0x00,0x01,0x00,0x01,0x00 };
const unsigned char ubxRate10Hz[] PROGMEM =
{ 0x06,0x08,0x06,0x00,100,0x00,0x01,0x00,0x01,0x00 };
const char baud38400 [] PROGMEM = "PUBX,41,1,3,3,38400,0";
int runoncevar = 0;
//size_t len;
//uint8_t a = 0, b = 0;

void setup()
{
  Serial.begin(9600);
  gpsPort.begin(9600);
  gps.send_P( &gpsPort, (const __FlashStringHelper *) baud38400 );
  gpsPort.flush();                              // wait for the command to go out
  delay( 100 );                                  // wait for the GPS device to change speeds
  gpsPort.end();                                // empty the input buffer, too
  gpsPort.begin( 38400 );                      // use the new baud rate

  sendUBX( ubxRate5Hz, sizeof(ubxRate5Hz) );   // change both "ubxRate5Hz" to "ubxRate1Hz" or ubxRate10Hz" for different rates
 
  Serial.println( F("GPS Start") );  // F macro saves RAM
}

void loop()
{
//  if (runoncevar = 0)
//  {
//   runoncevar++;
//   sendUBX( ubxRate5Hz, sizeof(ubxRate5Hz) );    
//  }
  if (gps.available( gpsPort ))
  {
    //Get the latest info from the gps object which it derived from the data sent by the GPS unit
    gps_fix fix = gps.read();

    Serial.print( F("Satellite Count:") );
    if (fix.valid.satellites)
      Serial.print( fix.satellites );
    Serial.print( F("\nLatitude:") );
    if (fix.valid.location)
      Serial.print( fix.latitude(), 6 );
    Serial.print( F("\nLongitude:") );
    if (fix.valid.location)
      Serial.print( fix.longitude(), 6 );
    Serial.print( F("\nSpeed MPH:") );
    if (fix.valid.speed)
      Serial.print( fix.speed_mph() );
//    Serial.print( F("\nAltitude Meters:") );
//    if (fix.valid.altitude)
//      Serial.print( fix.altitude());
    Serial.print( F("\nHeading:") );
    if (fix.valid.heading)
      Serial.print( fix.heading() );
    if (fix.valid.time){
    Serial.print( F("\nMinutes:") );
      Serial.print(fix.dateTime.minutes);
    Serial.print( F("\nSeconds:") );
      Serial.print(fix.dateTime.seconds);
    Serial.print( F("\nCentiSeconds:") );      
      Serial.print( fix.dateTime_cs );
    }
    Serial.println();
  }
}

void sendUBX( const unsigned char *progmemBytes, size_t len )
{
  gpsPort.write( 0xB5 ); // SYNC1
  gpsPort.write( 0x62 ); // SYNC2

  uint8_t a = 0, b = 0;
  while (len-- > 0) {
    uint8_t c = pgm_read_byte( progmemBytes++ );
    a += c;
    b += a;
    gpsPort.write( c );
  }

  gpsPort.write( a ); // CHECKSUM A
  gpsPort.write( b ); // CHECKSUM B

}