124 lines
4.5 KiB
Arduino
124 lines
4.5 KiB
Arduino
/*
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Get the GPGGA NMEA sentence using getLatestNMEAGPGGA
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By: Paul Clark
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SparkFun Electronics
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Date: January 12th, 2021
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License: MIT. See license file for more information but you can
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basically do whatever you want with this code.
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This example shows how to turn on/off the NMEA sentences being output over I2C.
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It then demonstrates how to use the new getLatestNMEAGPGGA function to retrieve the latest GPGGA message.
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getLatestNMEAGPGGA returns immediately - it is not blocking.
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It returns:
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0 if no data is available
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1 if the data is valid but is stale (you have read it before)
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2 if the data is valid and fresh
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If the module is using multiple GNSS constellations, the GGA message will be prefixed with Talker ID "GN" instead of "GP".
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The library includes a getLatestNMEAGNGGA function too.
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This example shows how to use both functions - and how to change the Talker ID so the GNGGA messages become GPGGA.
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This example turns off all sentences except for GGA.
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Feel like supporting open source hardware?
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Buy a board from SparkFun!
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ZED-F9P RTK2: https://www.sparkfun.com/products/15136
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NEO-M8P RTK: https://www.sparkfun.com/products/15005
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SAM-M8Q: https://www.sparkfun.com/products/15106
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Hardware Connections:
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Plug a Qwiic cable into the GNSS and a RedBoard
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If you don't have a platform with a Qwiic connection use the SparkFun Qwiic Breadboard Jumper (https://www.sparkfun.com/products/14425)
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Open the serial monitor at 115200 baud to see the output
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*/
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#include <Wire.h> //Needed for I2C to GNSS
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#include <SparkFun_u-blox_GNSS_Arduino_Library.h> //Click here to get the library: http://librarymanager/All#SparkFun_u-blox_GNSS
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SFE_UBLOX_GNSS myGNSS;
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void setup()
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{
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Serial.begin(115200);
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Serial.println(F("SparkFun u-blox GNSS Example"));
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Wire.begin();
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//myGNSS.enableDebugging(); // Uncomment this line to enable debug messages on Serial
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if (myGNSS.begin() == false)
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{
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Serial.println(F("u-blox GNSS not detected at default I2C address. Please check wiring. Freezing."));
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while (1)
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;
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}
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//Disable or enable various NMEA sentences over the I2C interface
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myGNSS.setI2COutput(COM_TYPE_NMEA | COM_TYPE_UBX); // Turn on both UBX and NMEA sentences on I2C. (Turn off RTCM and SPARTN)
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myGNSS.disableNMEAMessage(UBX_NMEA_GLL, COM_PORT_I2C); // Several of these are on by default on ublox board so let's disable them
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myGNSS.disableNMEAMessage(UBX_NMEA_GSA, COM_PORT_I2C);
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myGNSS.disableNMEAMessage(UBX_NMEA_GSV, COM_PORT_I2C);
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myGNSS.disableNMEAMessage(UBX_NMEA_RMC, COM_PORT_I2C);
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myGNSS.disableNMEAMessage(UBX_NMEA_VTG, COM_PORT_I2C);
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myGNSS.enableNMEAMessage(UBX_NMEA_GGA, COM_PORT_I2C); // Leave only GGA enabled at current navigation rate
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// Set the Main Talker ID to "GP". The NMEA GGA messages will be GPGGA instead of GNGGA
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myGNSS.setMainTalkerID(SFE_UBLOX_MAIN_TALKER_ID_GP);
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//myGNSS.setMainTalkerID(SFE_UBLOX_MAIN_TALKER_ID_DEFAULT); // Uncomment this line to restore the default main talker ID
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myGNSS.setHighPrecisionMode(true); // Enable High Precision Mode - include extra decimal places in the GGA messages
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//myGNSS.saveConfiguration(VAL_CFG_SUBSEC_IOPORT | VAL_CFG_SUBSEC_MSGCONF); //Optional: Save only the ioPort and message settings to NVM
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Serial.println(F("Messages configured"));
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//myGNSS.setNMEAOutputPort(Serial); // Uncomment this line to echo all NMEA data to Serial for debugging
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}
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void loop()
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{
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// getLatestNMEAGPGGA calls checkUblox for us. We don't need to do it here
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NMEA_GGA_data_t data; // Storage for the GPGGA data
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uint8_t result = myGNSS.getLatestNMEAGPGGA(&data); // Get the latest GPGGA data (if any)
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if (result == 0)
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{
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Serial.println(F("No GPGGA data available"));
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}
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else if (result == 1)
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{
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Serial.println(F("GPGGA data is available but is stale"));
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}
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else // if (result == 2)
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{
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// Data contains .length and .nmea
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Serial.print(F("Latest GPGGA: Length: "));
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Serial.print(data.length);
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Serial.print(F("\tData: "));
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Serial.println((const char *)data.nmea); // .nmea is printable (NULL-terminated)
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}
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result = myGNSS.getLatestNMEAGNGGA(&data); // Get the latest GNGGA data (if any)
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if (result == 0)
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{
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Serial.println(F("No GNGGA data available"));
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}
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else if (result == 1)
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{
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Serial.println(F("GNGGA data is available but is stale"));
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}
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else // if (result == 2)
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{
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// Data contains .length and .nmea
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Serial.print(F("Latest GNGGA: Length: "));
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Serial.print(data.length);
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Serial.print(F("\tData: "));
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Serial.println((const char *)data.nmea); // .nmea is printable (NULL-terminated)
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}
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delay(250);
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}
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