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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.
@Reinoud
Yes, I have found that article. I would like to know if it is possible to check if the crystal is working fine. I have two crystals lying around which I have 'harvested' from old electronic devices, but don't know for sure if they work...