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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.
@Pi
Hi. Some good information that helped me can be found at Puck.js and Node-RED with MQTT. You can use a Raspberry Pi (I am using "Zero W" which has wi-fi and bluetooth, and costs around 10 euro), and send the information you want from Puck to the Pi (and vice-versa).