gnss receiver in python

To receive GNSS data in Python, you can use the pySerial library to communicate with a GNSS receiver over a serial port. The GNSS receiver will typically output NMEA sentences that contain the position, velocity, and time information.

Here's an example code that shows how to read NMEA sentences from a GNSS receiver connected over serial port:


main.py
import serial

# open serial port to communicate with the GNSS receiver
ser = serial.Serial('/dev/ttyUSB0', baudrate=9600, timeout=1)

# loop to read NMEA sentences from the serial port
while True:
    # read a line from the serial port
    line = ser.readline().decode('utf-8')
    
    # check if the line starts with a valid NMEA sentence
    if line.startswith('$GPGGA'):
        # parsing the GGA sentence to get the latitude, longitude, and altitude
        fields = line.split(',')
        lat = float(fields[2][:2]) + float(fields[2][2:]) / 60
        if fields[3] == 'S': lat = -lat
        lon = float(fields[4][:3]) + float(fields[4][3:]) / 60
        if fields[5] == 'W': lon = -lon
        alt = float(fields[9])
        print('latitude:', lat, 'longitude:', lon, 'altitude:', alt)
795 chars
21 lines

This code reads NMEA sentences from the GNSS receiver connected to the serial port /dev/ttyUSB0, and extracts the latitude, longitude, and altitude information from the GGA sentences. The extracted data is printed to the console. Feel free to modify the code according to your specific receiver and application requirements.

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