Shield for Tx/Rx RS485?

Forum 2005-2010 (read only) Hardware Interfacing
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I'm looking into using an arduino to setup a basic device that can receive and send RS485 and output the traffic to a PC over USB. For debugging purposes I would also like to be able to send data from the PC to the output line. Since this is my first project I'm hoping there is already a shield which I can just use to get this functionality. I'm also hoping there is a way to attach two RJ-11 jacks to the device (one in and one out) since these lines are already run in my house and I don't use them for a landline. My day job is a computer programmer so I'm not worried about the software aspect of handling this data, but my electronic experience is very limited so I'm just looking for the easiest setup possible to get up and running. Any suggestions would be most welcome.

thanks

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3

The only problem with this is that it uses the serial port that you want to use over USB to communicate with your PC. In that case you will have to use an Arduino Mega which has 4 serial ports or use the soft serial extension library.

4

Look at adding a Maxim MAX3140 which has a SPI compatible UART with a RS485/422 interface. Connect it to the SPI port and you have a second UART.

  • Tony
5

Maybe this is worth a look too?

http://www.dfrobot.com/index.php?route=product/product&path=35_39&product_id...