You are reading a single comment by @Gordon and its replies.
Click here to read the full conversation.
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.
@Gordon
Ahh, forgot about that - yes, 5 seconds an hour will provide much better battery life.
It should be easy enough for you to tweak the code above to do a 5 second average (probably just keep a sum of the FFTs, and do the loop over them at the end).