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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.
@DrAzzy
You're saying the link lights actually react to pings, despite that you're not successfully setting the IP address? That's strange indeed! Check your router (usually they provide a way to list connected clients) and see if the WizNET adapter is listed (look for the MAC address)... that'd help narrow down what's going on - though I'm not sure if it's actionable.
Also - Have you checked that those connections are all okay? ? Sometimes those breadboards are flaky.