read_nmea: Extract NMEA sentences
In paleolimbot/nmea: Parse 'NMEA' Sentences

For well-formed NMEA, existing tools for reading text are likely more useful

read_nmea(
  x,
  ...,
  sentence_start = c("$", "!"),
  sentence_end = "\n",
  max_length = 82L
)

`x`	An object from which to extract NMEA sentences. For the default method this can be a `raw()` vector, a filename, a URL, or a connection.
`...`	Unused
`sentence_start`	A vector of possible characters that denote the start of a sentence. These must be a single character.
`sentence_end`	A sequence that denotes the end of a sentence. The NMEA specification suggests that sentences always end with a carriage return (\r) and a new line (\n); however, because these files are opened and saved on various systems, a often only a newline follows a sentence.
`max_length`	The maximum number of characters to scan after and including `sentence_start` before giving up on finding `sentence_end`. The NMEA specification suggest the maximum length is 82 characters, however extensions occasionally send longer sentences. This values includes both `sentence_start` and `sentence_end`.