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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.
the1laz
@Gordon
You could use
EspruinoToolsto get a command-line interface if that helps - it uses thebleatNPM module which has some support for other OS's.This definitely does establish some kind of connection - there's no pairing though. It's something that could be added (I think relatively easily) but it's not a priority at the moment.
Are you sure you're not getting BTLE confused with 'normal' bluetooth? The chip's BTLE won't establish a 'normal' serial port connection on your phone - you need some special code from Nordic for the 'Nordic UART', so an existing smartwatch app is unlikely to work unless it has specific support for that.