pynmea2 | Python library for parsing the NMEA 0183 protocol | Map library
kandi X-RAY | pynmea2 Summary
kandi X-RAY | pynmea2 Summary
Python library for parsing the NMEA 0183 protocol (GPS)
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Top functions reviewed by kandi - BETA
- Yields the next line from the stream
- Reads the contents of the file
- Parse a NMEasentence
- Return a regular expression matching the data
- Calculate checksum of nmea_str
- Parse a single sentence
- Return the longitude of the longitude
- Convert a geographic coordinate value to a float
- Returns the number of seconds in seconds
- Convert seconds to seconds
- Returns the number of minutes in degrees
- Return number of minutes
- Return the number of minutes in minutes
- Returns the latitude in degrees
- Return the next line
- Read the contents of the file
- Return the number of seconds in seconds
pynmea2 Key Features
pynmea2 Examples and Code Snippets
Lines of Code : 8License : Strong Copyleft (CC BY-SA 4.0)
Copyport = "/dev/ttyAMA0"
ser = serial.Serial(port, baudrate=9600, timeout=0.5)
while True:
newdata = ser.readline()
if newdata[0:6] == "$GPRMC":
# rest of your code
>>> for c in s:
... print(f'{c} {ord(c):08b}')
...
® 10101110
. 00101110
³ 10110011
3 00110011
Í 11001101
M 01001101
import re
from pprint import pprint
nmea = [
"$GNRMC,175230.00,A,5231.08575,N,def read_line(tries=0):
global sio
# Flush the buffer
serial_port.reset_input_buffer()
try:
line = sio.readline()
...
while True:
serial_port.close()
time.sleep(5)
serial_portb'i\x9a\xcab\x82\xbab\x8a\xb2b\x92\xc2b\x92\xca\x9ab\x8a\xa2R\xba\xc2jR":A\x1dMY\xb1\xcd\xb1\xc9\xb1\xc5\xc1\xb1\xc5\xe1\xb1\xd1\xd9\xb1\xc5\xd5\xdd\xb1\xc9\xc1\xb1\xc9\xd5\xb1\xc9\xd5\xb1\xc5\xc5\xd9\xb1\xc5\xd1\xb1\xc9\xd9\xb1\xd9\xc5\xbdef readGPS(serialObject):
try:
result = {}
result_set = set()
request_set = {'GPGGA', 'GPVTG', 'GPRMC'}
while not request_set.issubset(result_set) and len(result_set) != 10: # 10 == max sentences
import datetime
import pytz
tz_eastern = pytz.timezone('US/Eastern')
tz_brussels = pytz.timezone('Europe/Brussels')
time_date_string = '2019-08-20 19:03:51'
brussels_time = tz_eastern.localize(
datetime.datetime.strptime(time_date_s#!python2
from csv import writer
import time
counter = 0
with open('GPSdata.csv', 'wb') as f:
data_writer = writer(f)
data_writer.writerow(['Term No.','Date and Time','Latitude','Longitude'])
while True:
time.sleep(1)data = get_sense_data
data = get_sense_data()
while True:
gps_fix = ser.readline().decode('ascii')
gps_data = parse_gps(gps_fix)
if gps_data is not None and int(gps_data.num_sats) > 7:
break```
After a few errors about str and int i finally managed to work out str = serailPort.readline().decode()
Community Discussions
Trending Discussions on pynmea2
QUESTION
I'm doing a project with a Ublox NEO 6m gps and a Raspberry Pi 4 model B and I'm stuck on the following error:
...ANSWER
Answered 2021-Jun-07 at 15:17I'm assuming this is due to your code re-initializing the connection each loop. I recommend trying the following code instead --
QUESTION
I'm getting output from a sensor (GPS) in Python and for some reason, the output is not entirely clean. I'm already using pynmea2 and its checksum to filter out the bad rows but I want to improve the acceptance rate.
If you look at some sample data from the sensor, you see that many characters are replaced with something that could be corrected by a human, such as ® = . or ³ = 3. Some on the other hand, are less clear, such as ¶ or ± or Ç = G and not C.
I've tried to research how I could fix this but short of creating a hardcoded map or search and replace, I can't come up with anything. Is there a library or a way to "clean up" my input to solve at least the obvious one and thus boost my acceptance rate?
...ANSWER
Answered 2021-Apr-04 at 19:32There is a one-bit error between ®/., ³/3, Í/M (same bit):
QUESTION
Here is a minimal, testable example of some code I have written to read NMEA data being provided to the UART of the RaspberryPi. I am running this with python3. I would expect the UTC timestamp to show about a 5 second delta between iterations. However, it is always 1 second.
ANSWER
Answered 2021-Feb-13 at 21:47Looks like I have a lot to learn about how buffering works in the serial library. I found two methods to solve my problem.
The first is to flush the serial buffer before I attempt the sio.readline():
QUESTION
I have a Neo 6M GPS module that I am trying to print coordinates from. It is currently printing NMEA sentences in byte form with \r\n stuck to the end. Here is an example:
b'$GPGGA,161812.371,4042.759,N,07400.317,W,1,12,1.0,0.0,M,0.0,M,,*7B\r\n'
To parse the string into coordinates, I need to get rid of the \r,\n and b' '
To do this, I am trying .strip("b'rn\\"). Turns out you can only strip strings, not bytes.
To overcome the incompatibility of the bytes and strip, I tried to decode the bytes as a string like this: (ser.readline().decode("utf-8")).strip("b'rn\\")
This doesn't run and I get this error:
...ANSWER
Answered 2021-Jan-08 at 21:40Note: I changed my original comment to an answer when it grew longer than a comment in response to OP's amplification of the original question.
You can't get rid of the b' '. It isn't in the data. It is a Python convention that shows you your data is a bytestring and not a regular string. A call to decode() will turn the bytestring into a string. The \r\n, on the other hand, is in the data. It shows that your device is terminating the string with a carriage-return/linefeed pair. Both of those count as whitespace. The character 0xfe at the beginning is the first part of a byte order mark pair \xfe\xff and can be discarded. So all you should need is ser.readline()[2:].decode("utf-8").strip().
As for the uninterpretable data you did not mention in your question, but only in a subsequent comment:
With neither the device nor its documentation I can do little more than speculate on the apparently binary data you are getting prefixed to the data you want. It certainly isn't character data of any sort I can identify: it's not UTF-8 and it's not valid UTF-16, and my hunch is that it isn't an East Asian MBCS either. And it is unlikely to be floats or ints because there isn't a single zero byte, and binary numeric data (and UTF-32) tends to have a lot of those.
But if the data you want starts with a known constant like $GPGGA, then it should not be very difficult to pick what you want out of the stream you get. For example, suppose you get
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