E.getTemperature() results when below zero

It is the very basic code you published for the Puck.js:

NRF.setAdvertising({
    0x1809 : [Math.round(E.getTemperature())]
  },{
    name: "Puck.js 13f1"
  });

Perhaps I need to parse the results in node-red but its returning an unsigned int (I think)