I had kind of a brainflash/fart today but decided to share in case someone finds it useful.
An arduino encoded radio tracking system.
One end is a reciever with this morsecode-decoder and the other is a transmitter with an arduino sending the same code over and over again.
The transmitter could then be identified with the morse-decoder by the code it transmits.
Uses would be wildlifetracking, studies of streams och seacurrents.
Just wanted to throw this out there.