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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.
@Andreas_Rozek
Increasing interval length does not really help - both boards will eventually hang up.
Additionally: when trying to connect after a reset, I also often get the error message "Unable to retrieve board information. Connection Error?"
Even if that is followed by "Connected to Web Bluetooth, Espruino MICROBIT (No response from board)" that connection appears to be inoperable.