Subject:
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Re: RCX <-> PC communication, more details
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Newsgroups:
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lugnet.robotics.rcx.java
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Date:
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Mon, 16 Sep 2002 14:25:17 GMT
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Viewed:
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4507 times
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Hi Kaspar,
Thanx for the information.
In the Lejos-discussion mailing list (Sept 13), Lawrie Griffiths wrote:
"A timeout of 100 milliseconds or more should ensure that it reads all the
bytes in one message."
Looks like it confirms what you experimented...
Wap
"Chb" <kgunten@iiic.dot.ethz.dot.ch> a écrit dans le message de news:
H2J8rL.DyE@lugnet.com...
> > I also found out, that the reason, why LNP does not get all packets • through
> > to the RCX, is possibly swamping. I'll test that hypothesis and will try • to
> > slow the PC down when sending. I'll inform you here about my results as • soon
> > as I am done.
>
> Great, I just had too much time at hand, so I could already test the
> hypothesis above. Great, to be able to post a followup to my own message
> within half an hour...
>
> Ok, here it comes:
>
> The PC __IS__ swamping the RCX when using the LNP protocol. When putting • the
> RCX within directly in front of the tower, I achieve 100% correct
> transmission of the 20 ints with a 75 ms delay after each out.write() on • the
> PC side. Any shorter delays did not lead to a complete transmission • sequence.
>
> Moving the RCX away from the tower affects both the delay (naturally it • needs
> to be larger with increasing distance) and makes the communication • errorprone
> to ambient light and other factors (obviously).
>
> So much FYI only.
>
> Regards,
> Kaspar
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Message is in Reply To:
 | | Re: RCX <-> PC communication, more details
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| (...) Great, I just had too much time at hand, so I could already test the hypothesis above. Great, to be able to post a followup to my own message within half an hour... Ok, here it comes: The PC __IS__ swamping the RCX when using the LNP protocol. (...) (22 years ago, 16-Sep-02, to lugnet.robotics.rcx.java)
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