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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
I suppose it could be something to do with the soldering of the serial line going from the HC-05 to Espruino (so Espruino RX)... Maybe try resoldering the two wires marked with the red dots in the top-right of this picture: