aferust/tinygpsplus4d

TinyGPSPlus4d is a dlang port of the TinyGPSPlus (-betterC).

TinyGPSPlus4d

• A dlang port of the TinyGPSPlus.
• Compatible with betterC.
• It never uses dynamic allocations.
• It allows you parsing NMEA sentences read from GPS receivers.

Example with dummy data:

import tinygpsplus;

TinyGPSPlus gps;

extern (C) int main()
{
    string gpsStream =
"$GPRMC,045103.000,A,3014.1984,N,09749.2872,W,0.67,161.46,030913,,,A*7C\r\n
$GPGGA,045104.000,3014.1985,N,09749.2873,W,1,09,1.2,211.6,M,-22.5,M,,0000*62\r\n
$GPRMC,045200.000,A,3014.3820,N,09748.9514,W,36.88,65.02,030913,,,A*77\r\n
$GPGGA,045201.000,3014.3864,N,09748.9411,W,1,10,1.2,200.8,M,-22.5,M,,0000*6C\r\n
$GPRMC,045251.000,A,3014.4275,N,09749.0626,W,0.51,217.94,030913,,,A*7D\r\n
$GPGGA,045252.000,3014.4273,N,09749.0628,W,1,09,1.3,206.9,M,-22.5,M,,0000*6F\r\n";
    

    foreach (char c; gpsStream)
    {
        if (gps.encode(c))
                displayInfo();
    }

    return 0;
}

void displayInfo()
{
    import core.stdc.stdio;

    printf("Location: "); 
    if (gps.location.isValid())
    {
        printf("%.6f,%.6f", gps.location.lat(), gps.location.lng());
    }
    else
    {
        printf("INVALID");
    }

    printf("  Date/Time: ");
    if (gps.date.isValid())
    {
        printf("%d/%d/%d",
            gps.date.day(),
            gps.date.month(),
            gps.date.year()
        );
    }
    else
    {
        printf("INVALID");
    }

    printf(" ");
    if (gps.time.isValid())
    {
        if (gps.time.hour() < 10) printf("0");
        printf("%d", gps.time.hour());
        printf(":");
        if (gps.time.minute() < 10) printf("0");
        printf("%d", gps.time.minute());
        printf(":");
        if (gps.time.second() < 10) printf("0");
        printf("%d", gps.time.second());
        printf(".");
        if (gps.time.centisecond() < 10) printf("0");
        printf("%d", gps.time.centisecond());
    }
    else
    {
        printf("INVALID");
    }

    printf(" HDOP: %.1f", gps.hdop.hdop());
    printf(" Nof.sat: %d", gps.satellites.value());
    printf("\n");
}

Example with a GPS device connected via serial port

import tinygpsplus;

TinyGPSPlus gps;

import core.time;
import serial.device; // use a serial port library such as serial-port

void main()
{
    Duration timeoutread = dur!("msecs")(2000);
    Duration timeoutwrite = dur!("msecs")(2000);
    string port = "COM5"; // for posix: /dev/ttyusb0, /dev/ttyacm0 etc.

    auto com = new SerialPort(port, timeoutread, timeoutwrite);
    scope (exit) com.close;
    com.speed = BaudRate.BR_9600;

    ubyte[256] buffer;

    while(true){
        try {
            com.read(buffer);
            foreach (char c; cast(char[])buffer[]) // The library is fed data char by char (designed for connected devices in mind).
            {
                if (gps.encode(c))
                        displayInfo(); // check validity, positioning quality, accuracy, get location info etc.
            }
        } catch (TimeoutException e){ // handle the serial connection related issues etc.
            import std.stdio : writeln; 
            writeln(e.msg);
        }
        
    }
}