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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
Just FYI I have two superminis with red antenna and they're also bad, so it's not specifically the antenna (I haven't tried C3 mini).
Recent builds now do set the wifi tx power, but that doesn't appear to be enough for my boards. They did at one point connect to wifi ok, so part of me wonders whether without the power setting they were using high power to the mismatched aerial and they've actually now damaged themselves.