Did anyone manage to get SBAS reliable working on B2?

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halemmerich in reply to @HopeToBeUseful1day

It does, but that happens after the checksum is calculated. The cmd going into checksum() does not yet contain it.

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HopeToBeUseful1day in reply to @halemmerich
I'm not sure if "$" should be accounted in the checksum.
As shown here, NMEA checksum calculation does not include "$" and "*"
Lets assume the following NMEA sentence:
```
$GPGLL,5300.97914,N,00259.98174,E,125926,A*28
```
In this sentence the checksum is the character representation of the
hexadecimal value 28. The string that the checksum is calculated over
is
```
GPGLL,5300.97914,N,00259.98174,E,125926,A
```
To calculate the checksum you parse all characters between $ and *
from the NMEA sentence into a new string.

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