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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.
@bluebie
WiFi is fairly commonly run over 20-30km ranges with bridge devices like the NanoBridge, for point to point data links. The radios in those devices aren't much more powerful than a common home wifi router. There's certainly no distance limitation on WiFi to make it unsuitable over long distances.