standard bluetooth services in espruino ?

Hi,

Yes, it's really easy to get Espruino to advertise standard services - you just look up the service you want on the bluetooth site: https://www.bluetooth.com/specifications/gatt/services

In this case: https://www.bluetooth.com/specifications/gatt/viewer?attributeXmlFile=org.bluetooth.service.battery_service.xml

Then you just use setServices/updateServices with the info from that page, so something like:

NRF.setServices({
  0x180F : {
    0x2A19 : {
      value : Puck.getBatteryPercentage(),  readable : true
    }
  }
});

setInterval(function() {
  NRF.updateServices({
    0x180F : {
      0x2A19 : {
       value : Puck.getBatteryPercentage()
      }
    }
  });
}, 60000);