save_nmea_data.py

import serial
import datetime

ser = serial.Serial("/dev/cu.usbserial-0001", baudrate=9600)
ser.flushInput()
ser.flushOutput()
idx = 0

nmea_data = b""

# skip first line, since it could be incomplete
ser.readline()

while True:
    idx += 1
    nmea_sentence = ser.readline()
    nmea_data += nmea_sentence

    if idx % 100 == 0:
        print(f"idx: {idx}")
        
    if idx % 2000 == 0:

        # save to file after 2000 sentences added
        filename = datetime.datetime.utcnow().strftime("data/gps_data_%Y%m%d-%H%M%S.nmea")
        f = open(filename, "ab")
        f.write(nmea_data)
        f.close()
        
        nmea_data = b""

Try replacing "ab" with "wb". "ab" appends to file and throws error if file does not exist

…

On Sun, 19 Mar 2023 at 00:15, Bi4xe ***@***.***> wrote: ***@***.**** commented on this gist. ------------------------------ https://prnt.sc/JwD9MHF2F94G Hi sir. I am getting an error like in the picture, what should I do? — Reply to this email directly, view it on GitHub <https://gist.github.com/f879cf78b4173d2a116be68587179c1d#gistcomment-4507544> or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAGBN6TMJVQYQBNCOVG32NDW4WYOZBFKMF2HI4TJMJ2XIZLTSKBKK5TBNR2WLJDHNFZXJJDOMFWWLK3UNBZGKYLEL52HS4DFQKSXMYLMOVS2I5DSOVS2I3TBNVS3W5DIOJSWCZC7OBQXE5DJMNUXAYLOORPWCY3UNF3GS5DZVRZXKYTKMVRXIX3UPFYGLK2HNFZXIQ3PNVWWK3TUUZ2G64DJMNZZDAVEOR4XAZNEM5UXG5FFOZQWY5LFVEYTCNBXGM3DMMZQU52HE2LHM5SXFJTDOJSWC5DF> . You are receiving this email because you authored the thread. Triage notifications on the go with GitHub Mobile for iOS <https://apps.apple.com/app/apple-store/id1477376905?ct=notification-email&mt=8&pt=524675> or Android <https://play.google.com/store/apps/details?id=com.github.android&referrer=utm_campaign%3Dnotification-email%26utm_medium%3Demail%26utm_source%3Dgithub> .