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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
Hmm. looks like an SPI problem on the F4 then. Sorry about that... Maybe you could try the 1v44 from the website? I did some SPI tweaks recently and I guess that could have somehow broken it.