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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.
@tickTock
Here's a tip to avoid a pitfall with the VL discovery board from STM. I'm sure I've read something similar relating to espruino, but I can't find the text anymore.
If your ST-Link Utility can't connect to the board and you got an "Internal command error" use the "Connect under reset" feature of the utility. Just press and hold the reset button of the board and choose the Menu item "Target" -> "Connect" (or click on the connect icon). Release the reset button. And now ST-Link should establish a connection.