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congratulations for your work, I think I found the perfect place for my progect.
the two years started my progect ROV but with some change advice in my life, I had to stop. something in me made me believe I was able to finish, thanks to you I woke up and started again, I already have some of the material in my office and I'm buying a module for Arduino. I have some doubts whether this board allows a serial rs485 I would like to help if possible

Yes, you can do RS4285 communication, but you'll need a transceiver chip like this these: http://www.newark.com/jsp/search/browse.jsp?N=200718+810017209&No=0&getResults=true&appliedparametrics=true&locale=en_US&divisionLocale=en_US&catalogId=&prevNValues=200718&filtersHidden=false&appliedHidden=false&originalQueryURL=%2Fjsp%2Fsearch%2Fbrowse.jsp%3FN%3D200718%26No%3D0%26getResults%3Dtrue%26appliedparametrics%3Dtrue%26locale%3Den_US%26divisionLocale%3Den_US%26catalogId%3D%26prevNValues%3D200718

Yes, you can do RS4285 communication, but you'll need a transceiver chip like this these: http://www.newark.com/jsp/search/browse.jsp?N=200718+810017209&No=0&getResults=true&appliedparametrics=true&locale=en_US&divisionLocale=en_US&catalogId=&prevNValues=200718&filtersHidden=false&appliedHidden=false&originalQueryURL=%2Fjsp%2Fsearch%2Fbrowse.jsp%3FN%3D200718%26No%3D0%26getResults%3Dtrue%26appliedparametrics%3Dtrue%26locale%3Den_US%26divisionLocale%3Den_US%26catalogId%3D%26prevNValues%3D200718

I am interested in RS485 as well, would like to wire up an Arduino compatible LAN around the house.  Doesn`t anybody make an affordable shield using one of those chips?

RS-485 is NOT the same as ehternet, so be careful.  They both utilize the RJ-45 connector type but are entirely different protocols.  If you want to put an arduino on your LAN, you should get the arduino ethernet shield.

I'm looking for cheap.  I don't need ethernet to monitor my sump pump.

You'd need to make your own shield with that chip then.

Hi, Here's an RS485 "Electronic Brick" which usesa 4 pin connector for +5, Gnd, Xmit, Rcve  and another pin for Bus Direction. It has two 3-pin connectors for bus in and bus out, with + and - data and Gnd.  http://arduino-direct.com/sunshop/index.php?l=product_detail&p=63

There is some incomplete information here: http://arduino-info.wikispaces.com/RS485-Brick  (which I have not finished translating, so the later part is still quite Chinglish..). Hope to finish this up soon... and add photos.. I'll try to find an image now... (see below for 3 Arduinos networked)..

This will be a continuing Arduino product in my shop, and the developer is considering a version with different RS485 bus connectors.. If anyone has suggestions on this, please let me know..

RS485 with a decent protocol would be a good low-overhead low-cost (These are $6.50 per node) solution.

I plan to show a Home Automation application using these...

Regards, Terry King

...In The Woods In Vermont

terry@yourduino.com

Terry King:

These RS485 look interesting but appear to use a proprietary cable connected to a proprietary shield? I would be interested in the brick without *any* soldered on connectors. Could then use as part of a hard wired home monitoring node. Could not find a spec sheet on the brick or the chip it uses on the web site.

This raises the question of, at what point is it worth doing your own printed circuit as opposed to buying a breakout board. I would buy ONE, think about buying FIVE, but do a printed circuit for TEN.