serial scan until \r\n

[Eric1977]

A couple of things I see:

1. Get rid of the first case structure. Your already setting the termination character on the Config Serial Port VI, then setting it again in the case structure. Don't do it twice.
2. I don't see a VISA Write. Is it continiously sending data?
3. Remove the VISA Open. Don't need it cause you have the Config Serial VI before the While Loop which opens the connection.
4. Set the Open/Create/Replace File to the outside of the While Loop. Your continiously opening the file which is unccessary.
5. Where's your Close File? Your keeping the file open after your main VI stops.

Make these changes and then get back with us.

[tayexdrums]

I have no need to write any data to the module at least as of right now. It is just continuosly reading data from the GPS unit. I made all the suggested changes and I am now back to square one. The only data written to the text file is the LAST data which was present in the text box on the front panel. I need it to continuosly update. Also, the last string which was printed to the text file was only a partial string. 

[Omar_II]

This the the sub VI I use to read a serial port ONE line at a time. The specified termination character ("return", "/r", 0xA) is used to terminate the read at the end of one line.

If it does not get a termination character, it will return a time out error. Feed that into a case structure and don't write to the file if there was an error 

[crossrulz]

A few things I immediately noticed.

1. You don't need to set the file position.  What you are doing is causing your old data to be written over.  Just remove it.
2. You need to wire your file reference through all of the cases.
3. I don't think you should be using the VISA Clear.  That could be causing you to lose data.
4. Since you are using the termination character for the VISA Read, why do you need to do a search for it?  Check for a timeout error on the VISA Read instead.  If there was a timeout, don't write.  Actually, just let the error cluster do it all for you.  You should wire the error cluster to the file IO anyways.

[Eric1977]

Try this...

[crossrulz]

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@Eric1977 wrote:

Try this...

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I'm sorry, but I have to point out your Rube.  You get the file position and then immediately set it to the same value.  Why even set the file position?  You don't need to because the position is incremented with every write.

[Omar_II · Accepted solution]

Try this with the Read One Line

[tayexdrums]

@Eric1977

I believe that did it! There was just one extra $ printed on the very last line, but I think I should be able to handle that. The attached text file is what I have been aiming for.

[tayexdrums]

@Omar_II

This code seems to run much more quickly and I have yet to get any unwanted characters printed on my text file. Thank you so much!

[Eric1977]

Your right. I did a test in another VI and set the file position to end first and then e While Loop handle the rest. Thanks for pointing out my Rube.