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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.
@jlawson
Further to this; after leaving the boards powered down for some time they again did not reset properly.
As mentioned I have 32.768kHz crystals connected to these three boards but I do not have the 12pF caps mounted since they all worked fine without them.
However, if I hold my finger over the 32.768kHz crystal leads they do reset properly and also reset properly if left powered after the initial successful boot.
So it seems they may now require the capacitors. I will update this post when I dig up some appropriate caps.