Subject:
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Re: NXT's in Series
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Newsgroups:
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lugnet.robotics
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Date:
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Tue, 18 Sep 2007 06:40:40 GMT
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Original-From:
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Johanâ„¢Strandberg <johanges@gmail.=IHateSpam=com>
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Viewed:
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10394 times
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I suspect that with the proper software (and maybe a special cable),
the I2C protocol can be used to network between NXT controllers. I2C
is a multi master bus with collision detection, so it "should" work.
It's just a SMOP [Small Matter of Programming].
--j
On 9/17/07, Brian Davis <brdavis@iusb.edu> wrote:
> [Cross-posted to lugnet.robotics as it's on-topic there]
>
> In lugnet.technic, Duane Hess wrote:
>
> > Is there a way that I can easily chain two NXT's in series to have a
> > total of six outputs?
>
> There's no absolutely transparent way to make a program running on one NXT
> address the sensor or motor ports of a 2nd (or 3rd, or 4th) NXT. However, a lot
> of solutions to this problem were worked out in the RCX, such as:
> 1) Using face-to-face light sensors to binary-signal between the NXTs
> 2) Hooking two motors together (on the NXT), so that a rotation by one is "seen"
> by the other, and vis-versa (but keep the two NXTs from both trying to "drive"
> the connection at the same time!)
> 3) Exchange simple messages, allowing one NXT to "command" the 2nd NXT to run
> its motors, read its sensors, etc. On the RCX you did this with one of 256
> (8-bit) IR "messages", while on the NXT, you could individually address up to
> three "slave" NXTs with secure BT channels, and the messages you could send are
> almost unlimited (since you can send some fairly long text strings).
>
> --
> Brian Davis
>
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Message has 1 Reply:
 | | Re: NXT's in Series
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| (...) pbLua supports communication over the RS485(?) port. That's sensor port 4. Using that port, you can connect several NXTs together. You just need a cable that connects to several ports. Steve (19 years ago, 18-Sep-07, to lugnet.robotics)
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Message is in Reply To:
| | Re: NXT's in Series
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| [Cross-posted to lugnet.robotics as it's on-topic there] (...) There's no absolutely transparent way to make a program running on one NXT address the sensor or motor ports of a 2nd (or 3rd, or 4th) NXT. However, a lot of solutions to this problem (...) (19 years ago, 17-Sep-07, to lugnet.technic, lugnet.robotics)
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