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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
Just to add, the docs for
setServicesare here: http://www.espruino.com/Reference#l_NRF_setServicesNeither
readnorwritein your example above are valid, so that probably explains why at least0x2902isn't readable.