Nmea 0183 Version 4.11 Pdf [repack] -

def parse_nmea_sentence(sentence): if sentence[0] not in ['$', '!']: return None # Checksum verification (per 4.11 spec) if ' ' in sentence: data, chksum = sentence[1:].split(' ') calc = 0 for c in data: calc ^= ord(c) if int(chksum, 16) != calc: return None # bad checksum fields = sentence.split(',') talker_id = fields[0][1:3] # e.g., GP, GL, HE sentence_type = fields[0][3:] # e.g., RMC, GGA return 'talker': talker_id, 'type': sentence_type, 'fields': fields[1:]

Q: Is NMEA 0183 Version 4.11 compatible with older devices? A: Yes, NMEA 0183 Version 4.11 is backward compatible with older devices, but some features may not be supported. Nmea 0183 Version 4.11 Pdf

Version 4.11 defines the framework for manufacturer proprietary sentences (using the P talker ID). Without the official specification, you cannot correctly parse or construct these without guesswork. Without the official specification