VISA Serial + Arduino

[lord_nox]

Hi guys, maybe you remember me from an early post asking why my messages from LabVIEW to Arduino were truncated... Now I'm back with this issue:

I managed to "separate by lines" the full "too long string", but the thing is that the message is truncated in the same way than before... But I realize that growing the delay between sending each line, the Arduino received more and more lines from the total string. The thing is that I can't make this delay grow much more than 1 second, so I was wondering... if this happens because of the Arduino Buffer... can I "flush" the buffer or something? if yes, WHERE should I put this flushing thing?

I know that VISA offers "VISA Flush I/O Buffer" and "Visa Clear", but I'm not sure how to use them, at least, by now, none of them works for what I want to...

PS0: I'm attaching a picture of the SubVI that I'm using to write line by line

PS1: Sorry for my english, I hope you understand

PS2: Background: I'm sending "G-Codes" through LabVIEW interface to an Arduino using a RAMPS SHIELD (used for 3d printers) and "too long" G-Codes were truncated exactly at 200 characters (Early Post)

Thanks!

[crossrulz · Accepted solution]

If the problem is on the Arduino buffer, then the only thing you can do on the LabVIEW side is send the data at a slower rate.  Your issue is on the Arduino side.  Concentrate on fixing that (read data faster, increase your buffer size).

[lord_nox]

Its not the first time that someone told me about the limit is from the Arduino... I did check this and in my program I set the Buffer Size from 4 bits to 64 bits (I know that it's not the best option, but it works!)

[RavensFan]

Bits?  or Bytes?

[crossrulz]

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@lord_nox wrote:

I set the Buffer Size from 4 bits to 64 bits

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I think you mean 4 Bytes to 64 Bytes.  4 bits (0, 1) is 1/2 of a Byte (0-255, 8 bits).  A single character is a Byte.