Newbie question: TempeSensor ANT+ device type, how do I find out which device to use?

For watches (except the fr920) you can pair a tempe with the watch and then just access it as a standard sensor in an app - no need to do your own ANT stuff.

//this enables the tempe and checks to see if one is paired
		gotTempe=(Sensor.setEnabledSensors([Sensor.SENSOR_TEMPERATURE]).size()>0);
		Sensor.enableSensorEvents(method(:sensorEvents)); 
		
// then you'll see the temperature from the tempe in sensorEvents
	function sensorEvents(info) {
    	if(info.temperature!=null) {
    		tempTempe=info.temperature;
    	}
	} 
	
// you can also just call Sensor.getInfo() when you want and not use the callback