Java tutorial
/* * Copyright (c) Immotronic, 2012 * * Contributors: * * Lionel Balme (lbalme@immotronic.fr) * Kevin Planchet (kplanchet@immotronic.fr) * * This file is part of ubikit-core, a component of the UBIKIT project. * * This software is a computer program whose purpose is to host third- * parties applications that make use of sensor and actuator networks. * * This software is governed by the CeCILL-C license under French law and * abiding by the rules of distribution of free software. You can use, * modify and/ or redistribute the software under the terms of the CeCILL-C * license as circulated by CEA, CNRS and INRIA at the following URL * As a counterpart to the access to the source code and rights to copy, * "http://www.cecill.info". * * As a counterpart to the access to the source code and rights to copy, * modify and redistribute granted by the license, users are provided only * with a limited warranty and the software's author, the holder of the * economic rights, and the successive licensors have only limited * liability. * * In this respect, the user's attention is drawn to the risks associated * with loading, using, modifying and/or developing or reproducing the * software by the user in light of its specific status of free software, * that may mean that it is complicated to manipulate, and that also * therefore means that it is reserved for developers and experienced * professionals having in-depth computer knowledge. Users are therefore * encouraged to load and test the software's suitability as regards their * requirements in conditions enabling the security of their systems and/or * data to be ensured and, more generally, to use and operate it in the * same conditions as regards security. * * The fact that you are presently reading this means that you have had * knowledge of the CeCILL-C license and that you accept its terms. * * CeCILL-C licence is fully compliant with the GNU Lesser GPL v2 and v3. * */ package fr.immotronic.ubikit.pems.enocean.impl.item.datahandler; import java.util.ArrayList; import java.util.List; import org.json.JSONObject; import org.ubikit.event.AbstractEvent; import org.ubikit.event.EventGate; import fr.immotronic.ubikit.pems.enocean.EnoceanSensorData; import fr.immotronic.ubikit.pems.enocean.data.EEP070402Data; import fr.immotronic.ubikit.pems.enocean.event.out.RelativeHumidityEvent; import fr.immotronic.ubikit.pems.enocean.event.out.TemperatureEvent; import fr.immotronic.ubikit.pems.enocean.impl.EnoceanData; import fr.immotronic.ubikit.pems.enocean.impl.EnoceanDataHandler; import fr.immotronic.ubikit.pems.enocean.impl.item.data.EEP070402DataImpl; public final class EEP070402DataHandler implements EnoceanDataHandler { private final float supplyVoltageMultiplier = (1.5f / 66f); private final float supplyVoltageLowerRange = 2.5f; private final float temperatureMultiplier = (80f / 250f); private final float temperatureLowerRange = -20f; private final float relativeHumidityMultiplier = (100f / 250f); private EventGate eventGate; private String itemUID; private EEP070402Data sensorData; public EEP070402DataHandler(EventGate eventGate, String itemUID, int EEPType, JSONObject lastKnownData) { this.eventGate = eventGate; this.itemUID = itemUID; sensorData = EEP070402DataImpl.constructDataFromRecord(lastKnownData); } @Override public void processNewIncomingData(int transmitterID, EnoceanData data) { List<AbstractEvent> events = new ArrayList<AbstractEvent>(); byte[] dataBytes = data.getBytes(); // Checking if telegram is a teach-in telegram. If so, ignore it. if ((dataBytes[0] & 0x8) == 0x0) { return; } float temperature = Float.MIN_VALUE; // According to Eltako Profile, temperature = -20C..60C, DB1 = 0..250, linear temperature = ((float) (dataBytes[1] & 0xff) * temperatureMultiplier) + temperatureLowerRange; // Generate a Temperature event. events.add(new TemperatureEvent(itemUID, temperature, data.getDate())); float relativeHumidity = Float.MIN_VALUE; // According to Enocean Equipment Profile, relativeHumidity = 0..100%, DB2 = 0..250, linear relativeHumidity = (float) (dataBytes[2] & 0xff) * relativeHumidityMultiplier; // Generate and send an relative humidity event. events.add(new RelativeHumidityEvent(itemUID, relativeHumidity, data.getDate())); float supplyVoltage = Float.MIN_VALUE; // According to Enocean Equipment Profile, relativeHumidity = 0..100%, DB2 = 0..250, linear supplyVoltage = (((float) (dataBytes[3] & 0xff) - 0x59) * supplyVoltageMultiplier) + supplyVoltageLowerRange; // Generate and send an relative humidity event. events.add(new RelativeHumidityEvent(itemUID, relativeHumidity, data.getDate())); // Remembering received data sensorData = new EEP070402DataImpl(supplyVoltage, temperature, relativeHumidity, data.getDate()); // And then, send all generated events. Sending MUST be done after remembering received data, otherwise if an event listener performs // a getLastKnownData() on event reception, it might obtain non up-to-date data. eventGate.postEvents(events); } @Override public EnoceanSensorData getLastKnownData() { return sensorData; } }