nmea

问题 I'm trying to read NMEA message in Linux. But I can't get a completely message: 54.441,V,,,,,0.00,0.00,010720,,,N*42 $GPVTG,0.00,T,,M,0.00,N,0.00,K,N*32 $GPGGA,020954.441,,,,,0,0,,,M,,M,,*43 $GPGSA,A,1,,,,,,,,,,,,,,,*1E $GPGSA,A,1,,,,,,,,,,,,,,,*1E $GPGSV,1,1,00*79 $GLGSV,1,1,00*65 $GPGLL,,,,,020954.441,V,N*71 $GP The first line and last line is the one message but it have been splited. I thing, It's cause by sleep 1 second. And It's not right at all. I think I should use interrupt serial. My

来源： https://stackoverflow.com/questions/63917764/gpgga-and-gprmc-sentences-are-not-received-in-onnmeamessage

来源： https://stackoverflow.com/questions/63917764/gpgga-and-gprmc-sentences-are-not-received-in-onnmeamessage

来源： https://stackoverflow.com/questions/63917764/gpgga-and-gprmc-sentences-are-not-received-in-onnmeamessage

问题 I have a gps module that sends data (NMEA sentence) every 1 seconds to the serial port. I've been trying to read it from a c++ program. When reading the serial port with picocom, data is displayed in a clean way, each line has a NMEA sentence). The result of my program is close but lines are sometimes mixed. This is my code: #include <iostream> #include <stdio.h> #include <string.h> #include <fcntl.h> #include <errno.h> #include <termios.h> #include <unistd.h> int main(){ struct termios tty;

问题 I have a gps module that sends data (NMEA sentence) every 1 seconds to the serial port. I've been trying to read it from a c++ program. When reading the serial port with picocom, data is displayed in a clean way, each line has a NMEA sentence). The result of my program is close but lines are sometimes mixed. This is my code: #include <iostream> #include <stdio.h> #include <string.h> #include <fcntl.h> #include <errno.h> #include <termios.h> #include <unistd.h> int main(){ struct termios tty;

问题 I am using a ublox GPS for a data acquisition application. The device is outputting NMEA on a virtual COM port. The NMEA output works just fine. But between the NMEA messages strange characters are interspersed. See screenshot below from Realterm with setting "Ascii". Can somebody tell me what this is? And ideally what commands I would need to send to the device to disable this output? 回答1: You should disable the UBX binary protocol. The NMEA and UBX messages are interleaved on the same port.

问题 I am using a ublox GPS for a data acquisition application. The device is outputting NMEA on a virtual COM port. The NMEA output works just fine. But between the NMEA messages strange characters are interspersed. See screenshot below from Realterm with setting "Ascii". Can somebody tell me what this is? And ideally what commands I would need to send to the device to disable this output? 回答1: You should disable the UBX binary protocol. The NMEA and UBX messages are interleaved on the same port.

问题 I have a text file containing NMEA frames. I retrieve the latitude and the longitude of $GPGGA and $GPRMC frames. For this part, it was okay. Now, I'd like to convert the latitude and longitude into Decimal Degrees. The problem occur when I try to affect a values to Double[]coordinatestoconvert . This one is always null. It's like this error is really idiot, but I turn around all this morning for such a foolishness... Can someone help me please ? Here are the methods I am using : public

问题 I have written some C/C++ code including this NMEA library to parse data incoming from a gps device. #include <iostream> #include <string> #include <sstream> #include <cstring> #include <thread> #include <nmea/nmea.h> #include "GPSDevice.h" using namespace std; bool debugverbose = true; void debug(string message) { if(debugverbose) cout << "[ DEBUG ] " << message << endl; } bool errorverbose = true; void error(string message) { if(errorverbose) cout << "[ ERROR ] " << message << endl; exit(-1