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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.
@AkosLukacs
Two things: The battery level seems to be off / not representing the real remaining capacity: Didn't decrease much for a couple of days, but last day it depleted completely from ~20% in less than a day. Roughly the same "just as a watch" usage pattern, no BLE. Or the Improving Bangle.js E.showMenu code did left something running in the background that caused higher consumption.
GPS does get a fix inside if you are patient enough: Battery died, put on charger inside, and turned on GPS time and left it there. Went out to do other things for a while, and did get GPS time. One window in the room, but no direct line-of-sight at all to the sky from the place I charged it and ~50cm stone walls. Didn't check position accuracy tho.