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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
...even with the new firmware? and it was fine on the older firmware?
I've tried on the 1v4 boards and they seem fine (crystal + capacitors). It's possible that without capacitors the oscillator ran for a bit and then stopped, and it's causing that function to get stuck somewhere else waiting for the RTC to respond.