Example6_GetVal.ino

/*
  Get a device's I2C address using advanced getVal method
  By: Nathan Seidle
  SparkFun Electronics
  Date: January 9th, 2019
  License: MIT. See license file for more information but you can
  basically do whatever you want with this code.

  u-blox changed how to configure their modules in 2019. As of version 23 of the UBX protocol the
  UBX-CFG commands are deprecated; they still work, they just recommend using VALSET, VALGET, and VALDEL
  commands instead. This example shows how to use this new command structure.

  Feel like supporting open source hardware?
  Buy a board from SparkFun!
  ZED-F9P RTK2: https://www.sparkfun.com/products/15136
  NEO-M8P RTK: https://www.sparkfun.com/products/15005
  SAM-M8Q: https://www.sparkfun.com/products/15106

  Hardware Connections:
  Plug a Qwiic cable into the GPS and a RedBoard Qwiic or BlackBoard
  If you don't have a platform with a Qwiic connection use the SparkFun Qwiic Breadboard Jumper (https://www.sparkfun.com/products/14425)
  Open the serial monitor at 115200 baud to see the output
*/

#include <Wire.h> //Needed for I2C to GPS

#include "SparkFun_Ublox_Arduino_Library.h" //http://librarymanager/All#SparkFun_Ublox_GPS
SFE_UBLOX_GPS myGPS;

long lastTime = 0; //Simple local timer. Limits amount if I2C traffic to Ublox module.

void setup()
{
  Serial.begin(115200);
  while (!Serial)
    ; //Wait for user to open terminal
  Serial.println("u-blox getVal example");

  Wire.begin();
  Wire.setClock(400000); //Increase I2C clock speed to 400kHz

  if (myGPS.begin() == false) //Connect to the Ublox module using Wire port
  {
    Serial.println(F("u-blox GPS not detected at default I2C address. Please check wiring. Freezing."));
    while (1)
      ;
  }

  myGPS.enableDebugging(); //Enable debug messages over Serial (default)
  //myGPS.enableDebugging(SerialUSB); //Enable debug messages over Serial USB

#define UBLOX_CFG_I2C_ADDRESS 0x20510001

  uint8_t currentI2Caddress = myGPS.getVal8(UBLOX_CFG_I2C_ADDRESS);
  Serial.print("Current I2C address (should be 0x42): 0x");
  Serial.println(currentI2Caddress >> 1, HEX); //Ublox module returns a shifted 8-bit address. Make it 7-bit unshifted.

  while (1)
    ;
}

void loop()
{
  //Query module only every second. Doing it more often will just cause I2C traffic.
  //The module only responds when a new position is available
  if (millis() - lastTime > 1000)
  {
    lastTime = millis(); //Update the timer

    long latitude = myGPS.getLatitude();
    Serial.print(F("Lat: "));
    Serial.print(latitude);

    long longitude = myGPS.getLongitude();
    Serial.print(F(" Long: "));
    Serial.print(longitude);
    Serial.print(F(" (degrees * 10^-7)"));

    long altitude = myGPS.getAltitude();
    Serial.print(F(" Alt: "));
    Serial.print(altitude);
    Serial.print(F(" (mm)"));

    byte SIV = myGPS.getSIV();
    Serial.print(F(" SIV: "));
    Serial.print(SIV);

    Serial.println();
  }
}