jojoguy14 wrote:Since there is only 1 "Port 4", I don't see how could connect more than 2 NXT's via RS-485
jojoguy14 wrote:Hello there!
Does anyone know if it's possible to have more than 4 NXT's in a robot? I mean, you can have up to 4 connected through bluetooth, but is there some other way (bluetooth or other) to connect more than 4 NXT's? RS-485 maybe?
aagruntpuddock wrote:The Lego factory mentioned in this site http://www.thenxtstep.blogspot.com/ is apparently controlled by 5 NXTs. No mention of how (or even if) they are interconnected but a bit of research into that project might shed some light on the subject.
jojoguy14 wrote:physics-matt wrote:jojoguy14 wrote:So, you're saying I can do something like this:
 = NXT
-- = RS-485
__ = BT
The only problem with that approach is that each NXT can only talk to its neighbours. If you want one at one end to talk to one at the other end the message will have to be relayed, which will create a large latency.
IIRC, if you put all the NXTs onto a single RS485 bus, they will all be able to communicate to each other directly.
So...is RS-485 possible with some kind of multiplexer? Since there is only 1 "Port 4", I don't see how could connect more than 2 NXT's via RS-485
noeyewar wrote:They can all talk and listen, but if more than one talks at the same time, no one can hear anything.
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