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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.
@Gordon
Nice - thanks! Did you find a reference somewhere that 15uS was ok though?
As far as I could find, Nordic say that disabling IRQs even for a small amount of time will break the connection eventually: https://devzone.nordicsemi.com/f/nordic-q-a/7321/how-to-enable-and-disable-all-interrupts
Ideally I'd like to avoid doing something that they very specifically say not to do.