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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.
@user133430
Thank you all for looking into it, I was able to "fix" them by updating firmware with nRF Toolbox app. I also made a video of the issue when trying to hard reset it: https://youtu.be/zg66NeCJJPk