In these situations, a simple decoder like [Rostislav]’s is completely sufficient. We wrote about a couple of Morse code algorithms back in 2014, the MorseDetector and the Magic Morse algorithm.

Take one IpaQ running WinCE, on a strongARM processor, with built in microphone.Add a dash of MS eMbedded Visual Tools (eVB and eC++), a hefty dose of Ars Software Colloquium advice and simmer for ...