Subject:
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Re: Wireless RCX Communication.
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Newsgroups:
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lugnet.robotics
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Date:
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Sun, 11 Feb 2007 11:58:35 GMT
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Viewed:
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3507 times
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Allow me to re-state what I am trying to achieve:
I have however many RCX bricks, for which I want line of sight
communication between ONLY. For the RCX to PC comms, I would like to
use some other method that is not limited to line of sight, but I need
to have all the RCXs able to perform bi-directional communications.
The reason for this is that I have a grand plan of implementing Laser
Tag using the lego RCX brick as a the phasor unit. However, unless I
can get reliable PC comms it won't work.
Is there possibly a way to make it so that the RCX can transmit both
wirelessly and using IR at the same time with an IR to radio convertor
that is active only when the gae is not in progress? There must be
something.
I will find a way, if nobody else comes up with an idea.
Chris
Does this make sense now?
Claude Baumann wrote:
> In lugnet.robotics, Chris Malton wrote:
> > Hello,
> > This may seem a little odd, but I want to get the RCX talking to the
> > PC wirelessly without compromising the infrared sensors! This may seem
> > a little odd, but it is because I need line of sight between the two
> > robots, but communication from anywhere with the PC. I don't need this
> > to be secured or anything fancy, just plain communication, as the RCX
> > would do through the IR port, only wirelessly. I'd also prefer not to
> > have to use custom firmware.
> >
> > Any ideas how to do it?
> >
> > Bluetooth isn't an option unless you can have up to 50 or so devices
> > paired at once!
> >
> > Chris
>
> "little odd" ? This is totally odd.
>
> 1. Possible wireless channels are : infrared or visible light, modulated
> ultrasonic/sound or radio
>
> 2. You don't want to compromise infrared sensors, so there only remains
> modulated acoustics/ultrasonics or radio.
>
> 3. Anyway, using Bluetooth with the RCX is absolutely reserved for extreeeeeme
> advanced people who are not afraid of opening the RCX and hacking it and using
> replacement firmware that they must write themselves. There is only one guy who
> has done this, a student at Paderborn (Ge) University. So Bluetooth is not only
> a matter of price with the RCX. (cf
> http://www.convict.lu/Jeunes/Mars_Mission_B/Mars_mission_III.htm)
>
> 4. We have built a secure bidriectional infrared/RF repeater system for our
> Mars-project. This was odd but works without fail:
> http://www.convict.lu/Jeunes/Mars_Mission_B/Mars_Mission_B_Main.htm.
>
> 5. I think the European electronics journal Elektor presented another less
> complex non-secure IR/RF repeater system.
>
> 6. Why not use sound? You would build 2 Mike Gasperi's sound detectors, directly
> connect a loudspeaker to each RCX (as has done Prof Ole Caprani at Aarhus (Dk)
> University) in order to obtain enough intensity and try a kind of acoustic Morse
> or FSK.
>
> 7. Modulating ultrasonics is odd too, but also interesting.
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Message is in Reply To:
 | | Re: Wireless RCX Communication.
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| (...) "little odd" ? This is totally odd. 1. Possible wireless channels are : infrared or visible light, modulated ultrasonic/sound or radio 2. You don't want to compromise infrared sensors, so there only remains modulated acoustics/ultrasonics or (...) (18 years ago, 11-Feb-07, to lugnet.robotics)
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