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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
Take a look at the examples on http://www.espruino.com/Reference#l_NRF_setServices
When specifying a service, you can add an
onWritehandler function which will get called whenever the service is written to (obviously it also has to be set towritableas well)