Puck.js send via BLE button press toggle status

Hi, I think all you need is to make sure you keep setting everything you want advertised in setAdvertising. So for example:

var buttonState = 0;

function updateBLE() {
  NRF.setAdvertising({
    0x1809 : E.getTemperature(),
    0x180F : E.getBattery(),
    0xFFFF : [buttonState]
 }, {interval: 500});
}

updateBLE();
setWatch(function() {
    buttonState = !buttonState;
    digitalWrite(LED2, buttonState);
    updateBLE();
}, BTN1, { repeat:1, edge:"rising", debounce: 20 });

Worth adding that when you call setAdvertising, the values of battery/temp are set at the point that setAdvertising was called, so if you want them to update, you'll need to call it again every few minutes with setInterval