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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.
@user75928
I'm trying to use the same hardware, but working with Arduino. It seems to be that it is far from being as functional as a wemos D1 R2... I've tried almost everything, and when asked to robotdyn they sent a link to a wemos d1 example at instructables... my only current guess right now is that it will not work without an external antenna... my only current suggestion is "do not buy/use this hardware", aka "The bastard".