SparkFun Forums

[jim2386]

Hi all,

Simple question. Right now I have two Uno's "communicating" with each other via common ground and a signal wire linked between to digital pins. This works great when the uno's are side by side, but I'd like to place them 1'-10' apart. Does anyone know of a RF product where it transmits a simple digital on or off between two boards? I know there are packet radios that can send actual data, but that seems overkill here and may be slower since all I want to do is send 1 on or off at at time.

Thanks
Jim

[lyndon]

Explain why a longer wire won't work, first.

[jim2386]

Device 1 is on a table, device two is on a wall about 20' away. As much as I find wires across my living room floor aesthetically pleasing, my wife says otherwise.

[DanV]

Electronics-DIY.com has several devices that could work for you:

http://electronics-diy.com/store.php

[jremington]

There are several types of RF keyfobs with matching receivers, like this one: https://www.adafruit.com/products/1095

These are based on the PT2262/72 chips. The Arduino could be wired to push a button on the keyfob, or simulate either the transmitter or the receiver using the RCSwitch library and a matching transmitter or receiver module.

[ColinL]

You could also use IR, e.g. https://www.sparkfun.com/products/13235