GPS serialdevice : 3 sentence in one string

[alea46]

HI,
after making a test program that is decode manualy NMEA sentence, I saw that I received a single string with 3 NMEA sentences :
(program use listbox and strsplit to write NMEA sentence)

$GPZDA Date & Time
$GPGGA Global Positioning System Fix Data
$GPRMC Recommended minimum specific GPS/Transit data

These 3 sentences are separated by 2 specials Characters, but I don't know witch one (represented by square)

Is someone already had this problem?

How can I decoded this 2 specials characters?

How can I change this (serial parameters?)?

How can I securize data reading to avoid crash with not numeric data in latitude and longitude (single/double....)
:sign0085:

 

[agraham]

How can I decoded this 2 specials characters?

You could try getting their numeric value with "val = Asc(StrAt(...))" and then use "Chr(val)" in StrIndexOf(...) to find them.

 

[Erel]

Why don't you let the GPS library to parse the sentences?

The ending character is probably chr(10) which is linefeed.

 

[alea46]

Problem solve

Hi,
thanks for your Help.

I unsderstand the mistake I do using GPS.dll.
My GPS object is call "GPS1" and I do a sub call GPS_GPSdecoded in place of GPS1_GPSdecoded.

So it's work fine now.