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Subject: 
Re: LEGO MindStroms 2.0: Alternative transmission techniques
Newsgroups: 
lugnet.robotics
Date: 
Sun, 20 Oct 2002 11:51:07 GMT
Viewed: 
952 times
  
lego-robotics@crynwr.com (Steve Baker) writes:

1) Communications.  The RCX uses IR - which is pretty much line-of-sight
    only - so as soon as your robot drives under a table or around a
    corner, it'll have to navigate by itself, record all the data it
    collects and autonomously return to the PC to return results.

Or forbid tables etc. and communicate by reflection on the ceiling.

2) Navigation.  The problem of knowing where the robot is.  There have
    been many long discussions on this topic on this mailing list - and
    the bottom line is that NOBODY has a good solution.

Right.  Some markings on the floor can make it easier.

3) JAVA.  The Java implementation for RCX runs all the software on the
    PC and just sends commands to the RCX to turn on motors, read
    sensors, etc.  As has been pointed out, your RCX will be out of
    communication with the PC pretty much all of the time - so this
    isn't going to work.  This would have to be done in NQC or (more
    likely) BrickOS/GCC.

I can't imagine you never heard of leJOS (http://www.lejos.org),
which definitely runs Java on the RCX.

This is an EXTREMELY difficult problem.

I'd also suggest to simplify a bit first,
and make it more difficult as you go.

Jürgen

--
Jürgen Stuber <stuber@loria.fr>
http://www.loria.fr/~stuber/



Message is in Reply To:
  Re: LEGO MindStroms 2.0: Alternative transmission techniques
 
(...) Well, there are MANY difficult problems here. 1) Communications. The RCX uses IR - which is pretty much line-of-sight only - so as soon as your robot drives under a table or around a corner, it'll have to navigate by itself, record all the (...) (22 years ago, 19-Oct-02, to lugnet.robotics)

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