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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.
@allObjects
...you are fine with a electrolytic cap... just make sure connections are good... I guess you are using a ESP866 ESP-01 and a PICO? - see Breadboard friendly ESP8266 ESP-01 and Pico.