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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.
@tve
Well, maybe the cut-out isn't the biggest improvement. See http://www.espressif.com/sites/default/files/esp-wroom-02_pcb_design_and_module_placement_guide.pdf page 3 if interested