[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: Wireless transmission/noisy environment question

From: stijn slabbinck   stijnspess.com
Date: Wed, 22 Sep 2004 12:55:51 -0700

A! Sent via the Art & Robotics Group mailing list: arg-list@xxxxxxxxxxxxxxx
R! Use your "Reply All" to  reply to the list, "Reply" for private response
G!

We did a serial over bluetooth project.
works great with class I dongle (up to 100meter) and receivers
Implementation in max trough serial object is very easy to...


stijn


On 22-sep-04, at 21:42, Robert Gorbet wrote:

A! Sent via the Art & Robotics Group mailing list: arg-list@xxxxxxxxxxxxxxx
R! Use your "Reply All" to reply to the list, "Reply" for private response
G!

I have an art installation which consists of two components
needing to communicate with one-another at a relatively low
data rate (a few kbps will do).  In previous installations,
the components were connected with 500' of cat5 cable and we
used RS485 drivers on either end of this cable.

In an upcoming installation, the only potential route for the
cat5 would be within a few feet of high-voltage power lines
on power poles, and it would have to cross over an electric
streetcar route at 6' above the streetcar power.  We are a
little concerned with noise.  :-)

Questions:

1. should we be concerned about noise, at those data rates?

2. should we be concerned with the magnitude of potential
spikes damaging the receiver electronics?

3. if we consider wireless, what is the cleanest solution?
I am thinking RS485-aware radio modems, but there may be
other solutions.  Would this solution be just as sensitive
to noise in this environment?

4. what should I expect a plug-and play (i.e., rewire the
MAX xmit/rcvr chips to the modems instead of the cat5, and
press go) solution to cost?

5. does anyone have any experience with RF modems in this
kind of noisy environment?

Thanks much!
Rob.
___________________________
Robert Gorbet, PhD, PEng
Dept. of ECE,
University of Waterloo
200 University Ave. West
Waterloo, ON  N2L 3G1
+1-519-888-4567 x3489


A!
R!      messages saved at http://www.interaccess.org/arg/arg-list.html
G!      unsubscribe/help requests to mailto:Majordomo@xxxxxxxxxxxxxxx



A!
R!      messages saved at http://www.interaccess.org/arg/arg-list.html
G!      unsubscribe/help requests to mailto:Majordomo@xxxxxxxxxxxxxxx