Sorry, can't offer help here, but would like to know what hardware and software you are using to do this capture?
@Wilberforce started
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.
Sorry, can't offer help here, but would like to know what hardware and software you are using to do this capture?