[Rack] [Noisebridge-discuss] minotaur is down
ben at nerp.net
Fri Jul 5 23:44:22 UTC 2013
The other option is we could upgrade the atmega boards to
bulit-in-ethernet. Then we can address them over the network, and PoE
I have a spare PoE arduino board I'm not using.
On Fri, 5 Jul 2013, Jake wrote:
> what's wrong with the rs232 we're using now? inside each keypad is an
> atmega328 connected to a MAX232 chip, which translates the TTL serial of the
> arduino the real +-12v RS232 for the long haul. Also it's 300 baud.
> we don't need rs422 (whatever that is) for long runs of wire because we have
> ethernet, and wireless (thanks to you)
> a nice thing about RS232 is that the computer at the end of it already has
> the transciever built in.
> if you want to play with obscure data transmission stuff, find me a router or
> two with DS3 ports, so we can use these QAM16 modulators to beam stuff
> On Fri, 5 Jul 2013, Adrian Chadd wrote:
>> On 5 July 2013 16:18, Jake <jake at spaz.org> wrote:
>>> well, the payphone is one physical serial port, and the upstairs keypad is
>>> another. These are important because they are actual RS232 lines running
>>> long distances (like in the 1970's) and they are pretty mission-critical
>>> (literally in the mission) and the extra USB-serial layer would suck for
>>> that. so i'm glad we don't need to do that.
>> rs232 over long distance? why not just whack up RS422 and an Arduino?
>> I wonder if I should acquire some rs422/rs485 stuff and build some
>> long distance (100s to a couple thousand feet) long bus topology of
>> arduinos. Would there be any interest in a talk/demo of that kind of
>> (Yeah, i did a stint in control systems.)
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