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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.
@Gordon
Ahh, hang on - so
espruinoandespruino-serverappear to connect but don't stay connected - and same forbluetoothctl?I assumed from the comments before that
espruinoandbluetoothctlactually worked.When you tried flashing 1v91 onto the Puck, did you hold the button down while applying power, so the red LED stayed lit? If the red LED isn't on then it won't be in bootloader mode.
Assuming you get it to flash you could try the absolute latest build too: http://www.espruino.com/binaries/travis/master/
With the new build a long-press on startup will delete all the saved pairing info, which I guess could be causing problems (if the Puck rejected the PC because it had previously been bonded with different bonding info).