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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.
@PeterS
I am in the same situation, also after a firmware update through the firmware app. The firmware update did not work, but after reboot , long press button, it came in this loop. DFU with nRF fails with an error. Button is not stuck because when pressing it, I get the loading===== part. Is it possible to load new firmware via serial?