[Mike Field] was working on interfacing his TI Chronos eZ430 enjoy with the Raspberry Pi. As things were going pretty well, he took a side-trip from his intended hack as well as implemented watch-based control for an RPi audio player.
It really comes as no surprise that this is possible, as well as even easy. After all, the RPi board has native USB capability for hosting the watch‘s RF dongle, as well as it’s running Linux which we know already works well with the Chronos platform. but we still love the thought of having automation controls strapped to our wrist!
mpg321 is the audio playback program used for this hack. It plays MP3 files using ALSA for sound, which does have a few hiccups on the RPi. [Mike] found workarounds as well as included them in the C program he uses to gather everything into one great code package. control depends on keypresses sent from the enjoy (meant for use with PowerPoint) which are translated by his code as well as pushed to the audio/mp3 programs.