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1  Forum 2005-2010 (read only) / Interfacing / Re: Arduino data pins over eithernet wire on: April 11, 2010, 06:32:02 pm
Quote
That really depends on the data rate you wish to use. If your wiring a simple switch input or LED output then you could probably have it go several hundred feet if not more. If however you wished to send serial data then you might have problems after 50ft depending on the baud rate being used. There are driver/reciever chips (used for RS-485 type communications) that can send and receive data for thousands of feet with simple twisted pair wire.

Lefty

Yes it would be for serial data, specifically I would like to put a RFID reader using the Wiegand26 protocol (I think the baud rate is 9600) in one location and the arduino in a different location using ethernet wire

I was planning on using 2 wires for serial com and 2 wires to inject the power to the reader

Jon
2  Forum 2005-2010 (read only) / Interfacing / Arduino data pins over eithernet wire on: April 11, 2010, 03:02:18 pm
If I use a Ethernet cable on the data pins, what is the maximum length of wire i could use? Anyone have ideas or guesses?
Jon
3  Forum 2005-2010 (read only) / Exhibition / Re: SD card read/write with Arduino on: March 27, 2010, 07:51:46 pm
Hello All!
I'm am new to the Sd card phase. My question is which of the libraries and setups do you recommend for logging gps data strings to an sd card. Yes I know about Ladyadas shield and code but I am overwhelmed. I bought the sparkfun arduino sd shield without realizing it was a failed product. Through the forums I found how to wire it up and got the sparkfun code working but I'm still having small issues. So i'm coming here to find out where i should start.

Jon
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