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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
Not that I'm aware of. You could attach an ESP32, but even those are only 2.4GHz.
If Espressif does release a 5GHz WiFi module, chances are it'll have AT command firmware and will plug right in though.
Realistically you're not going to be able to take advantage of the extra speed you get from 5 GHz WiFi in Espruino, but obviously if you don't actually have a 2.4GHz WiFi network it's of little consolation!