I have found an open source one for Pebble (seems like old hardware) and Garmin; perhaps the software could be ported over or at least used as a base to find required parameters and options: https://github.com/OpenSeizureDetector
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
I have found an open source one for Pebble (seems like old hardware) and Garmin; perhaps the software could be ported over or at least used as a base to find required parameters and options:
https://github.com/OpenSeizureDetector