GPS signal check

The name of the pictureThe name of the pictureThe name of the pictureClash Royale CLAN TAG#URR8PPP



GPS signal check



as we all know GPS's signal looks like this:


$GPGLL,,,,,,V,N*64

$GPRMC,,V,,,,,,,,,,N*53

$GPVTG,,,,,,,,,N*30

$GPGGA,,,,,,0,00$GPRMC,,V,,,,,,,,,,N*53

$GPVTG,,,,,,,,,N*30
etc.



Few more line like this but we get the idea. The checksum of the first line equals "64" - so the sum of each character before "*" equals "64".



And my question to this is:



Since the gps transmit char[285] data and everysingle line starts with "$", how should i detect "$" -> add up everysingle char before "*" and check if it's equal to checksum with stm32f4?









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