Is it not using inheritance?

@gordon: i have a small question. the alert system work's but there is one issue i did not expect.

Currently i use this small test code for the DS18B20 sensor:

var ow = new OneWire(B8);
var sensor = require("DS18B20").connect(ow);
sensor.setAlarm(25, 30);

setInterval(function() {
  console.log(sensor.getTemp(), sensor.searchAlarm());
}, 1000);

The alert for 30° works fine. If the value is more than 30°, the alert starts. But the low value is works strange. If the value is under 26°, the alert starts. I expected, if the value is lower than 25.

Here the debug output (i delete all redundant lines)

26.3125 []
26.25 []
26.1875 []
26.125 []
26.0625 []
26 []
25.9375 [
  "288728080600007a"
]

Do you have an idea?