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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
PRs welcome... God knows why you'd want to change the name of your Puck to be a square though ;)
If you pre-escaped it you could do
NRF.setAdvertising({}, {name: "\xF0\x9F\x8D\x9F"});I guess? Not sure if that's the correct series of bytes for it though.