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Topic: RS 485 with Arduinos (Read 443 times) previous topic - next topic

foxnico

       Dear All,
I am currently looking into a RS 485 communication protocol in order to achive full or half duplex communication over a long cable
(+3000 ft ) between two arduinos .
I guess that for this kind of distance, good old RS232 will be to no avail. Have you heard of a project already using such a system ? (or maybe something better !)
           Thanks and good coding to you all !
                        Nick


Erni

http://www.gammon.com.au/forum/?id=11428

Graynomad

#2
Jun 21, 2012, 04:35 pm Last Edit: Jun 21, 2012, 04:40 pm by Graynomad Reason: 1
Remember that RS-485 is not a protocol, it's an electrical specification.

3000' should be doable at slower speeds, say 100-200kbps, even up to 400kbps.

You wll probably have to design your own protocol, it's details will depend on how robust you need the link to be.

______
Rob
Rob Gray aka the GRAYnomad www.robgray.com

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