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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
Are you sure you're subscribing to notifications in the nRF Connect app? It doesn't do it automatically when you look at the service, you have to click the icon by the side of it.
Just a thought, but maybe try not including the description - i think that'll be responsible for the 0x2901 descriptor at the very least.