Add setMainTalkerID and setHighPrecisionMode

examples/Automatic_NMEA/Example1_getLatestNMEAGPGGA/Example1_getLatestNMEAGPGGA.ino

@@ -14,6 +14,10 @@
     1 if the data is valid but is stale (you have read it before)
     2 if the data is valid and fresh
 
+  If the module is using multiple GNSS constellations, the GGA message will be prefixed with Talker ID "GN" instead of "GP".
+  The library includes a getLatestNMEAGNGGA function too.
+  This example shows how to use both functions - and how to change the Talker ID so the GNGGA messages become GPGGA.
+
   This example turns off all sentences except for GPGGA.
 
   Feel like supporting open source hardware?
@@ -59,7 +63,13 @@ void setup()
   myGNSS.disableNMEAMessage(UBX_NMEA_VTG, COM_PORT_I2C);
   myGNSS.enableNMEAMessage(UBX_NMEA_GGA, COM_PORT_I2C); // Leave only GGA enabled at current navigation rate
 
-  //myGNSS.saveConfiguration(); //Optional: Save these settings to NVM
+  // Set the Main Talker ID to "GP". The NMEA GGA messages will be GPGGA instead of GNGGA
+  myGNSS.setMainTalkerID(SFE_UBLOX_MAIN_TALKER_ID_GP);
+  //myGNSS.setMainTalkerID(SFE_UBLOX_MAIN_TALKER_ID_DEFAULT); // Uncomment this line to restore the default main talker ID
+
+  myGNSS.setHighPrecisionMode(true); // Enable High Precision Mode - include extra decimal places in the GGA messages
+
+  //myGNSS.saveConfiguration(VAL_CFG_SUBSEC_IOPORT | VAL_CFG_SUBSEC_MSGCONF); //Optional: Save only the ioPort and message settings to NVM
 
   Serial.println(F("Messages configured"));
 
@@ -81,20 +91,14 @@ void loop()
   {
     Serial.println(F("GPGGA data is available but is stale"));
   }
-  else if (result == 2)
+  else // if (result == 2)
   {
     // Data contains .length and .nmea
-    Serial.print(F("NMEA: Length: "));
+    Serial.print(F("Latest GPGGA: Length: "));
     Serial.print(data.length);
     Serial.print(F("\tData: "));
     Serial.println((const char *)data.nmea); // .nmea is printable (NULL-terminated)
   }
-  else
-  {
-    Serial.print(F("result == "));
-    Serial.print(result);
-    Serial.println(F(". This should be impossible!"));
-  }
 
   result = myGNSS.getLatestNMEAGNGGA(&data); // Get the latest GNGGA data (if any)
   
@@ -106,20 +110,14 @@ void loop()
   {
     Serial.println(F("GNGGA data is available but is stale"));
   }
-  else if (result == 2)
+  else // if (result == 2)
   {
     // Data contains .length and .nmea
-    Serial.print(F("NMEA: Length: "));
+    Serial.print(F("Latest GNGGA: Length: "));
     Serial.print(data.length);
     Serial.print(F("\tData: "));
     Serial.println((const char *)data.nmea); // .nmea is printable (NULL-terminated)
   }
-  else
-  {
-    Serial.print(F("result == "));
-    Serial.print(result);
-    Serial.println(F(". This should be impossible!"));
-  }
 
   delay(250);
 }

keywords.txt

@@ -446,11 +446,6 @@ initPacketUBXHNRPVT	KEYWORD2
 flushHNRPVT	KEYWORD2
 logHNRPVT	KEYWORD2
 
-setNMEALoggingMask	KEYWORD2
-getNMEALoggingMask	KEYWORD2
-setProcessNMEAMask	KEYWORD2
-getProcessNMEAMask	KEYWORD2
-
 setNavigationFrequency	KEYWORD2
 getNavigationFrequency	KEYWORD2
 setMeasurementRate	KEYWORD2
@@ -559,6 +554,19 @@ getHNRroll	KEYWORD2
 getHNRpitch	KEYWORD2
 getHNRheading	KEYWORD2
 
+setNMEALoggingMask	KEYWORD2
+getNMEALoggingMask	KEYWORD2
+setProcessNMEAMask	KEYWORD2
+getProcessNMEAMask	KEYWORD2
+
+setMainTalkerID	KEYWORD2
+setHighPrecisionMode	KEYWORD2
+
+getLatestNMEAGPGGA	KEYWORD2
+setNMEAGPGGAcallback	KEYWORD2
+getLatestNMEAGNGGA	KEYWORD2
+setNMEAGNGGAcallback	KEYWORD2
+
 extractLong	KEYWORD2
 extractSignedLong	KEYWORD2
 extractInt	KEYWORD2
@@ -745,3 +753,11 @@ SFE_UBLOX_MGA_ACK_INFOCODE_SIZE_MISMATCH	LITERAL1
 SFE_UBLOX_MGA_ACK_INFOCODE_NOT_STORED	LITERAL1
 SFE_UBLOX_MGA_ACK_INFOCODE_NOT_READY	LITERAL1
 SFE_UBLOX_MGA_ACK_INFOCODE_TYPE_UNKNOWN	LITERAL1
+
+SFE_UBLOX_MAIN_TALKER_ID_DEFAULT	LITERAL1
+SFE_UBLOX_MAIN_TALKER_ID_GP	LITERAL1
+SFE_UBLOX_MAIN_TALKER_ID_GL	LITERAL1
+SFE_UBLOX_MAIN_TALKER_ID_GN	LITERAL1
+SFE_UBLOX_MAIN_TALKER_ID_GA	LITERAL1
+SFE_UBLOX_MAIN_TALKER_ID_GB	LITERAL1
+SFE_UBLOX_MAIN_TALKER_ID_GQ	LITERAL1

src/SparkFun_u-blox_GNSS_Arduino_Library.cpp

@@ -1707,7 +1707,9 @@ void SFE_UBLOX_GNSS::process(uint8_t incoming, ubxPacket *incomingUBX, uint8_t r
       {
         uint8_t *lengthPtr = getNMEAWorkingLengthPtr(); // Get a pointer to the working copy length
         uint8_t *nmeaPtr = getNMEAWorkingNMEAPtr(); // Get a pointer to the working copy NMEA data
+        uint8_t nmeaMaxLength = getNMEAMaxLength();
         *lengthPtr = 6; // Set the working copy length
+        memset(nmeaPtr, 0, nmeaMaxLength); // Clear the working copy
         memcpy(nmeaPtr, &nmeaAddressField[0], 6); // Copy the start character and address field into the working copy
       }
 
@@ -12020,6 +12022,54 @@ void SFE_UBLOX_GNSS::logHNRPVT(bool enabled)
 
 // ***** Helper Functions for NMEA Logging / Processing
 
+// Set the mainTalkerId used by NMEA messages - allows all NMEA messages except GSV to be prefixed with GP instead of GN
+bool SFE_UBLOX_GNSS::setMainTalkerID(sfe_ublox_talker_ids_e id, uint16_t maxWait)
+{
+  //Get the current extended NMEA protocol configuration (V1)
+  packetCfg.cls = UBX_CLASS_CFG;
+  packetCfg.id = UBX_CFG_NMEA;
+  packetCfg.len = 0;
+  packetCfg.startingSpot = 0;
+
+  //Ask module for the current settings. Loads into payloadCfg.
+  if (sendCommand(&packetCfg, maxWait) != SFE_UBLOX_STATUS_DATA_RECEIVED) // We are expecting data and an ACK
+    return (false);
+
+  payloadCfg[9] = (uint8_t)id;
+
+  packetCfg.len = 20;
+  packetCfg.startingSpot = 0;
+
+  return (sendCommand(&packetCfg, maxWait) == SFE_UBLOX_STATUS_DATA_SENT); // We are only expecting an ACK
+}
+
+// Enable/Disable NMEA High Precision Mode - include extra decimal places in the Lat and Lon
+bool SFE_UBLOX_GNSS::setHighPrecisionMode(bool enable, uint16_t maxWait)
+{
+  //Get the current extended NMEA protocol configuration (V1)
+  packetCfg.cls = UBX_CLASS_CFG;
+  packetCfg.id = UBX_CFG_NMEA;
+  packetCfg.len = 0;
+  packetCfg.startingSpot = 0;
+
+  //Ask module for the current settings. Loads into payloadCfg.
+  if (sendCommand(&packetCfg, maxWait) != SFE_UBLOX_STATUS_DATA_RECEIVED) // We are expecting data and an ACK
+    return (false);
+
+  if (enable)
+  {
+    payloadCfg[3] |= (1 << 3); // Set the highPrec flag
+    payloadCfg[3] &= ~((1 << 0) | (1 << 2)); // Clear the compat and limit82 flags
+  }
+  else
+    payloadCfg[3] &= ~(1 << 3); // Clear the highPrec flag
+
+  packetCfg.len = 20;
+  packetCfg.startingSpot = 0;
+
+  return (sendCommand(&packetCfg, maxWait) == SFE_UBLOX_STATUS_DATA_SENT); // We are only expecting an ACK
+}
+
 // Log selected NMEA messages to file buffer - if the messages are enabled and if the file buffer exists
 // User needs to call setFileBufferSize before .begin
 void SFE_UBLOX_GNSS::setNMEALoggingMask(uint32_t messages)

src/SparkFun_u-blox_GNSS_Arduino_Library.h

@@ -522,6 +522,18 @@ enum sfe_ublox_mga_ack_infocode_e
 	SFE_UBLOX_MGA_ACK_INFOCODE_TYPE_UNKNOWN
 };
 
+// The mainTalkerId, set by UBX-CFG-NMEA setMainTalkerID
+enum sfe_ublox_talker_ids_e
+{
+	SFE_UBLOX_MAIN_TALKER_ID_DEFAULT,
+	SFE_UBLOX_MAIN_TALKER_ID_GP,
+	SFE_UBLOX_MAIN_TALKER_ID_GL,
+	SFE_UBLOX_MAIN_TALKER_ID_GN,
+	SFE_UBLOX_MAIN_TALKER_ID_GA,
+	SFE_UBLOX_MAIN_TALKER_ID_GB,
+	SFE_UBLOX_MAIN_TALKER_ID_GQ
+};
+
 //-=-=-=-=-
 
 #ifndef MAX_PAYLOAD_SIZE
@@ -1167,14 +1179,6 @@ public:
 	void flushHNRPVT(); //Mark all the data as read/stale
 	void logHNRPVT(bool enabled = true); // Log data to file buffer
 
-	// Helper functions for NMEA logging
-	void setNMEALoggingMask(uint32_t messages = SFE_UBLOX_FILTER_NMEA_ALL); // Add selected NMEA messages to file buffer - if enabled. Default to adding ALL messages to the file buffer
-	uint32_t getNMEALoggingMask(); // Return which NMEA messages are selected for logging to the file buffer - if enabled
-
-	// Helper functions to control which NMEA messages are passed to processNMEA
-	void setProcessNMEAMask(uint32_t messages = SFE_UBLOX_FILTER_NMEA_ALL); // Control which NMEA messages are passed to processNMEA. Default to passing ALL messages
-	uint32_t getProcessNMEAMask(); // Return which NMEA messages are passed to processNMEA
-
 	// Helper functions for CFG RATE
 
 	bool setNavigationFrequency(uint8_t navFreq, uint16_t maxWait = defaultMaxWait);	//Set the number of nav solutions sent per second
@@ -1323,8 +1327,21 @@ public:
 	float getHNRpitch(uint16_t maxWait = defaultMaxWait); // Returned as degrees
 	float getHNRheading(uint16_t maxWait = defaultMaxWait); // Returned as degrees
 
+	// Set the mainTalkerId used by NMEA messages - allows all NMEA messages except GSV to be prefixed with GP instead of GN
+	bool setMainTalkerID(sfe_ublox_talker_ids_e id = SFE_UBLOX_MAIN_TALKER_ID_DEFAULT, uint16_t maxWait = defaultMaxWait);
+
+	// Enable/Disable NMEA High Precision Mode - include extra decimal places in the Lat and Lon
+	bool setHighPrecisionMode(bool enable = true, uint16_t maxWait = defaultMaxWait);
+
+	// Helper functions for NMEA logging
+	void setNMEALoggingMask(uint32_t messages = SFE_UBLOX_FILTER_NMEA_ALL); // Add selected NMEA messages to file buffer - if enabled. Default to adding ALL messages to the file buffer
+	uint32_t getNMEALoggingMask(); // Return which NMEA messages are selected for logging to the file buffer - if enabled
+
+	// Helper functions to control which NMEA messages are passed to processNMEA
+	void setProcessNMEAMask(uint32_t messages = SFE_UBLOX_FILTER_NMEA_ALL); // Control which NMEA messages are passed to processNMEA. Default to passing ALL messages
+	uint32_t getProcessNMEAMask(); // Return which NMEA messages are passed to processNMEA
+
 	// Support for "auto" storage of NMEA messages
-	
 	uint8_t getLatestNMEAGPGGA(NMEA_GGA_data_t *data); // Return the most recent GPGGA: 0 = no data, 1 = stale data, 2 = fresh data
 	bool setNMEAGPGGAcallback(void (*callbackPointer)(NMEA_GGA_data_t)); //Enable a callback on the arrival of a GPGGA message
 	uint8_t getLatestNMEAGNGGA(NMEA_GGA_data_t *data); // Return the most recent GNGGA: 0 = no data, 1 = stale data, 2 = fresh data

src/u-blox_structs.h

@@ -2250,11 +2250,11 @@ struct nmeaAutomaticFlags
 };
 
 // The max length for NMEA messages should be 82 bytes, but GGA messages can exceed that if they include the
-// extra decimal places for "High Precision".
+// extra decimal places for "High Precision Mode".
 //
-// To be safe, let's allocate 90 bytes to store the GGA message
+// To be safe, let's allocate 100 bytes to store the GGA message
 
-const uint8_t NMEA_GGA_MAX_LENGTH = 90;
+const uint8_t NMEA_GGA_MAX_LENGTH = 100;
 
 typedef struct
 {