Subject:
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Re: LEGO Mindstroms 2.0: Alternative transmission techniques
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Newsgroups:
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lugnet.robotics.rcx.java
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Date:
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Sun, 20 Oct 2002 22:05:49 GMT
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Viewed:
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4837 times
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In lugnet.robotics.rcx.java, Andreas Nauerz writes:
> We do not want to use wires of course.
>
> Any ideas ?
> I guess IR is inappropriate in this case, or ?
> Are there other wireless solutions ?
Andreas,
IR struggles to keep contact in one room, so you need an RF wireless
solution. It is possible to include a PDA with Bluetooth or WiFi support as
part of your robot, and communicate between the PC and the PDA over the RF
protocol, and over IR to the RCX.
Andreas Gammel has posted messages recently on the lejos discussion list on
this. He describes the control path as follows:
The control path is now:
User pushes steering button ->
PC linux java user interface ->
PC Socket connecting to Access Point's IP ->
'local network' ->
WLAN Access Point ->
'air between Access Point and robot' ->
iPAQ WLAN card ->
iPAQ linux secure shell ->
iPAQ linux Socket Server ->
iPAQ rcx protocol generator ->
IPAQ Lirc infrared driver ->
'air between iPAQ and RCX'->
RCX protocol listener ->
RCX motors
Windows rather than Linux solutions should be possible. It should also be
possible to use Palm PDAs, which may be cheaper. PDA to RCX communication
over IR is the trickiest part.
Lawrie Griffiths
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