Using the checksum of a received rs232 string

[malteh]

Hello you

,

again a question.

A wind sensors answer (via RS232) is $WI,WVP=000.0,317,0*75\r\n where 000.0 is the wind direction, 317 the windspeed and 75 is a hex value checksum.

This checksum is created by XOR' ing all the hex values from the previous ASCII signs (left from the 75 checksum value) except the $ and * sign.

Is there a quick way to create this checksum in DASYlab?

The idea is to compare the checksum in DASYlab with the received checksum and, if not match, i.e. turn on a status light "corrupted data".

I think this question will often come up when devices with checksums are used. Therefore the question could be interesting to other forum users.

Thanks for you answer.

[BerndF]

Hello malteh,

I couldn't find a quick way to create checksums in DASYlab, but this forum entry might be of interest to you as the problem described is similar's to yours.

[mhennggo]

Quite new to LabView....I am developing a project using the Serial VISA for my communication.

Is it possible for the VISA to be set-up to send/receive data with checksum that it can recognize and check automatically?

What kind of checksum can it generate? Or do I have to generate the checksum through the code

[CJ_Butler__DASYLab_Pro]

This is the DASYLab Forum. You will want to repost your request in the appropriate VISA or LabVIEW forum.