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SparkFunGNSS/examples/Example6_EnableNMEASentences/Example6_EnableNMEASentences.ino
T

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Arduino

/*
Turn on/off various NMEA sentences.
By: Nathan Seidle
SparkFun Electronics
Date: January 3rd, 2019
License: MIT. See license file for more information but you can
basically do whatever you want with this code.
This example shows how to turn on/off the NMEA sentences being output
over UART1. We use the I2C interface on the u-blox module for configuration
but you won't see any output from this sketch. You'll need to hook up
a Serial Basic or other USB to Serial device to UART1 on your u-blox module
to see the output.
This example turns off all sentences except for the GPGGA and GPVTG sentences.
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 GNSS and a RedBoard
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
Hookup a Serial Basic (https://www.sparkfun.com/products/15096) to UART1 on the u-blox module. Open a terminal at 57600bps
and see GPGGA and GPVTG sentences.
*/
#include <Wire.h> //Needed for I2C to GNSS
#include <SparkFun_u-blox_GNSS_Arduino_Library.h> //Click here to get the library: http://librarymanager/All#SparkFun_u-blox_GNSS
SFE_UBLOX_GNSS myGNSS;
unsigned long lastGNSSsend = 0;
void setup()
{
Serial.begin(115200); // Serial debug output over USB visible from Arduino IDE
Serial.println("Example showing how to enable/disable certain NMEA sentences");
Wire.begin();
if (myGNSS.begin() == false)
{
Serial.println(F("u-blox GNSS not detected at default I2C address. Please check wiring. Freezing."));
while (1)
;
}
//Disable or enable various NMEA sentences over the UART1 interface
myGNSS.disableNMEAMessage(UBX_NMEA_GLL, COM_PORT_UART1); //Several of these are on by default on ublox board so let's disable them
myGNSS.disableNMEAMessage(UBX_NMEA_GSA, COM_PORT_UART1);
myGNSS.disableNMEAMessage(UBX_NMEA_GSV, COM_PORT_UART1);
myGNSS.disableNMEAMessage(UBX_NMEA_RMC, COM_PORT_UART1);
myGNSS.enableNMEAMessage(UBX_NMEA_GGA, COM_PORT_UART1); //Only leaving GGA & VTG enabled at current navigation rate
myGNSS.enableNMEAMessage(UBX_NMEA_VTG, COM_PORT_UART1);
//Here's the advanced configure method
//Some of the other examples in this library enable the PVT message so let's disable it
myGNSS.configureMessage(UBX_CLASS_NAV, UBX_NAV_PVT, COM_PORT_UART1, 0); //Message Class, ID, and port we want to configure, sendRate of 0 (disable).
myGNSS.setUART1Output(COM_TYPE_NMEA); //Turn off UBX and RTCM sentences on the UART1 interface
myGNSS.setSerialRate(57600); //Set UART1 to 57600bps.
//myGNSS.saveConfiguration(); //Optional: Save these settings to NVM
Serial.println(F("Messages configured. NMEA now being output over the UART1 port on the u-blox module at 57600bps."));
}
void loop()
{
if (millis() - lastGNSSsend > 200)
{
myGNSS.checkUblox(); //See if new data is available, but we don't want to get NMEA here. Go check UART1.
lastGNSSsend = millis();
}
}