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Published on: August 17, 2013 / Comments: None

Transferring data via audio FSK — modem style!

I think I'll make my own dialup ringtone...

tempdiagram

I stumbled on this awesome project called minimodem.  It’s a software FSK audio modem.  It allows you to encode and decode data as audio — just like dialup modems and fax machines used to.  This lead me to finding an Arduino project where Emmanuel is creating a long range temperature sensor that transmit’s temperature data over walkie-talkie radios and is decoded by minimodem.
On the Arduino side Emmanuel is using the RTTI Library. On the PC side it uses minimodem to de-modulate the encoded data.  Here’s a video of it in action.  What a great set of tools to add to the collection.   And you can make all sorts of cool projects, or hell just experimenting with the minimodem application itself.

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