readr15d_locosys.py

import serial
import pynmea2

# Open the serial port
ser = serial.Serial('/dev/ttyUSB0', 115200)

# Read and print the output
while True:
    try:
        data = ser.readline().decode('ascii', errors='ignore').strip()
        if data.startswith('$GNGGA'):
            msg = pynmea2.parse(data)
            print('Latitude: {0:.6f}, Longitude: {1:.6f}'.format(msg.latitude, msg.longitude))
        elif data.startswith('$GNRMC'):
            msg = pynmea2.parse(data)
            speed = getattr(msg, 'spd_over_grnd', None)
            course = getattr(msg, 'true_course', None)
            if speed is not None and course is not None:
                print('Speed: {0:.2f} knots, Course: {1:.2f} degrees'.format(speed, course))
        elif data.startswith('$GNGLL'):
            msg = pynmea2.parse(data)
            print('Latitude: {0:.6f}, Longitude: {1:.6f}'.format(msg.latitude, msg.longitude))
        else:
            print(data)
    except KeyboardInterrupt:
        # Close the serial port on Ctrl-C
        ser.close()
        break