Simple SmartThings Thermostat

simple-thermostat.groovy

definition(
    name: "Outdoor Thermostat",
    namespace: "cramforce",
    author: "Malte",
    description: "Simple SmartThings Thermostat",
    category: "Convenience",
    iconUrl: "https://s3.images-iherb.com/sns/sns01567/u/3.jpg",
    iconX2Url: "https://s3.images-iherb.com/sns/sns01567/u/3.jpg"
)

preferences {
    section("Heater") {
        input "heater", "capability.switch", title: "Heater", required: true
    }
    section("Thermometer") {
        input "temperature", "capability.temperatureMeasurement", title: "Thermometer", required: true
        input "temperatureConfigure", "capability.configuration", title: "Thermometer for configuration", required: true
    }
    section("Controller") {
        input "controller", "capability.switch", title: "Controlling switch", required: true
    }
    section("Temperature") {
        input "targetTemp", "number", title: "Target Temperature", defaultValue: 80, required: true
    }
}

def installed() {
    subscribe(temperature, "temperature", tempChanged)
    subscribe(controller, "switch", tempChanged)
    runEvery1Minute(minute)
}

def updated() {
	unsubscribe()
    unschedule()
    installed()
    tempChanged()
    minute()
}

def minute() {
	if (controller.currentValue("switch") != "on") {
    	return;
    }
    // This triggers a new measurement because otherwise we only get a valu every 8 minutes
    log.debug "Configure thermostat"
    temperatureConfigure.configure();
}

def tempChanged(evt) {
	if (controller.currentValue("switch") != "on") {
    	log.debug "Controller switch off"
        if (heater.currentValue("switch") == "on") {
        	heater.off();
        }
        return;
    }
	def temp = temperature.currentValue("temperature");
    log.debug "Temp changed: $temp"
    if (temp < targetTemp) {
    	log.debug "Turning on heater: $temp < $targetTemp"
        sendNotificationEvent("$app.label: Turning on heater: $temp < $targetTemp");
    	heater.on();
    } else {
    	log.debug "Turning off heater: $temp >= $targetTemp"
        sendNotificationEvent("$app.label: Turning off heater: $temp >= $targetTemp");
    	heater.off();
    }
}