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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
There's only one firmware image, which has the support built into it. There used to be two for some boards (CC3000 & WIZnet) but since CC3000 was discontinued (and also rubbish) I've only been supporting WIZnet for new boards.
You'll be able to use WIZnet and WiFi, but not at the same time I'm afraid. You should be able to flip between them, but just not have an open connection on each one at the same time.