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I'm interested in trying some experiments in (URL) swarm robotics>. The basic idea is that simple robots with simple programming can behave in complex ways, provided that there are 1.) a lot of them, and 2.) they can communicate locally in some (...) (18 years ago, 8-Aug-06, to lugnet.robotics, lugnet.robotics.nxt, lugnet.announce, lugnet.events.brickfest, FTX) !
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| | Re: NXT Robot Swarm at BrickFest -- featuring Bluetooth
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I forgot to cross-post this to lugnet.technic. (18 years ago, 8-Aug-06, to lugnet.technic, FTX)
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| | Re: NXT Robot Swarm at BrickFest -- featuring Bluetooth
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The spec says that at most three other Bluetooth units may be connected to each NXT unit for any given program, but with proper setup one unit could act as a message-passing server for all the others in a swarm, or a simple broadcast relay protocol (...) (18 years ago, 11-Aug-06, to lugnet.robotics.nxt, FTX)
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| | Re: NXT Robot Swarm at BrickFest -- featuring Bluetooth
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(...) The problem (I think; somebody want to prove me wrong?) is that the "master" NXT can send messages to at most three "slave" NXTs, but the "slaves" can not then act as BT masters to still more units. In other words, it seems very very easy to (...) (18 years ago, 11-Aug-06, to lugnet.robotics.nxt, FTX)
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| | Re: NXT Robot Swarm at BrickFest -- featuring Bluetooth
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It's good that people are interested! With the RCX couldn't you just have a robot broadcast a message to anything that could see the IR signal and was waiting for specific messages to arrive? Can a similar thing be done with BT? Would we be better (...) (18 years ago, 11-Aug-06, to lugnet.robotics.nxt, FTX)
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| | Re: NXT Robot Swarm at BrickFest -- featuring Bluetooth
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(...) Jordan, I think swarming would be very fun to explore, but, for me, there isn't enough time before BF. Here's something you could play around with before BF: (URL) by getting your robot to follow the line on the test pad. To answer your (...) (18 years ago, 11-Aug-06, to lugnet.robotics.nxt, FTX)
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| | Re: NXT Robot Swarm at BrickFest -- featuring Bluetooth
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(...) As I was working on my ruby-nxt module, I managed to get the nxt to connect to my laptop as both a master and a slave. On my laptop (a MacBookPro) I created an incoming bluetooth serial port and an outgoing serial port on the DEV-B device (...) (18 years ago, 11-Aug-06, to lugnet.robotics.nxt)
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| | Re: NXT Robot Swarm at BrickFest -- featuring Bluetooth
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(...) I played around with this a little bit, trying to confirm what I've been told. It is possible to have an NXT connect as either a master or a slave, but not both at the same time. I'm sure this is true. Here's what I did: I took three NXTs with (...) (18 years ago, 13-Aug-06, to lugnet.robotics.nxt)
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| | Re: NXT Robot Swarm at BrickFest -- featuring Bluetooth
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Here's an idea of how to get more than 3 NXTs connected via Bluetooth (BT). It involves using a PC as a "relay point". I think standards allow up to seven simultaneous connections per BT device. The limitation to three connections on the NXT may be (...) (18 years ago, 13-Aug-06, to lugnet.robotics.nxt)
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| | Re: NXT Robot Swarm at BrickFest -- featuring Bluetooth
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(...) My problems with this solution are two-fold. First, NXT-G currently can't send anything back to the PC, as it's not running anything to get the NXT-G message structure (yes, folks could write this... almost certainly will. But likely not me). (...) (18 years ago, 13-Aug-06, to lugnet.robotics.nxt)
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| | Re: NXT Robot Swarm at BrickFest -- featuring Bluetooth
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In article <J3y0B4.FM0@lugnet.com>, Brian Davis <brdavis@iusb.edu> wrote (...) I shall have PC software to do this, and probably others will have similar tools before I finish. (...) I believe 7 is the number of connections specified in the (...) (18 years ago, 15-Aug-06, to lugnet.robotics.nxt)
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| | Re: NXT Robot Swarm at BrickFest -- featuring Bluetooth
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The NXT Robot Swarm has been scheduled for Saturday at 12:30 in Junior Ballroom 3. It seems the goal of this first event is to get some basic BT communication working, and if there's time, actually try a swarm-like experiment. If anything else, it (...) (18 years ago, 22-Aug-06, to lugnet.robotics.nxt, FTX)
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| | Re: NXT Robot Swarm at BrickFest -- featuring Bluetooth
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(...) I can loan out an iBook with BT - and it has the NXT retail software. Joe Meno Event Coordinator (18 years ago, 22-Aug-06, to lugnet.robotics.nxt, FTX)
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| | Re: NXT Robot Swarm at BrickFest -- featuring Bluetooth
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(...) Jordan, Sorry to tell you this, but getting NXTs to talk to each other isn't going to take very long. Of course, figuring out what to say may take a bit. People should be able to bring almost any NXT robot, and we'll be able to get them to (...) (18 years ago, 22-Aug-06, to lugnet.robotics.nxt)
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| | Re: NXT Robot Swarm at BrickFest -- featuring Bluetooth
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(...) I meant busy in the context of the other subthread in this thread, in which people proposed hacking a way around the master-slave restrictions. But still, that's good news, so we'll have to think of some stuff for the robots to do that will be (...) (18 years ago, 22-Aug-06, to lugnet.robotics.nxt)
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