Team
How big is one NMEA string? If I have to parse for lattitude, longitufe, altitude and velocity, how big will this data be? And do you have a sample parser code - how much memory / MHz will be required for this execution assuming NMEA is coming every second?
Riyaz,
The maximum length is around 82 characters per sentence.
Parser code is provided but is optional. The incoming NMEA messages are first decoded and then if the user requests, specific data can be parsed (using the APIs). This is not at all computationally intensive and could work at 8MHz or perhaps even lower.
Memory requirements depend, but the core NMEA APIs fit in 1kB of RAM, and the parsing functions don't require memory at all (so still 1kB).
It might be possible to optimize memory to throw away unneeded messages for example to fit them into smaller memory footprints (if the user parses the data needed and then throws away the message).
Regards,Gustavo
Thankyou Gustavo!
Do you mean 82 ch in one NMEA message?
If I parse and store the log/lat/alt/vel data, how big will that data be?
Riyaz
RIyaz,
Correct, each message's maximum number of characters is 82. However, most messages are less than that.
The data for just that information is about 30 bytes.