gistfile1.py

preferences {
	section("Monitor the temperature...") {
		input "temperatureSensor", "capability.temperatureMeasurement"
}

def installed() {
	subscribe(temperatureSensor, "temperature", temperatureHandler)
}

def updated() {
	unsubscribe()
	subscribe(temperatureSensor, "temperature", temperatureHandler)
}

def temperatureHandler(evt) {
	log.trace "temperature: $evt.doubleValue; $evt"
	httpGet("http://your.database.com/action.php?temp=$evt.doubleValue")
}