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   1 /**
   2  * Copyright (c) 2010-2021 Contributors to the openHAB project
   3  *
   4  * See the NOTICE file(s) distributed with this work for additional
   5  * information.
   6  *
   7  * This program and the accompanying materials are made available under the
   8  * terms of the Eclipse Public License 2.0 which is available at
   9  * http://www.eclipse.org/legal/epl-2.0
  10  *
  11  * SPDX-License-Identifier: EPL-2.0
  12  */
  13 package org.openhab.binding.nikohomecontrol.internal.protocol.nhc2;
  14
  15 import static org.openhab.binding.nikohomecontrol.internal.protocol.NikoHomeControlConstants.*;
  16
  17 import java.lang.reflect.Type;
  18 import java.net.InetAddress;
  19 import java.security.cert.CertificateException;
  20 import java.util.ArrayList;
  21 import java.util.List;
  22 import java.util.NoSuchElementException;
  23 import java.util.Objects;
  24 import java.util.Optional;
  25 import java.util.concurrent.CompletableFuture;
  26 import java.util.concurrent.CopyOnWriteArrayList;
  27 import java.util.concurrent.ExecutionException;
  28 import java.util.concurrent.ScheduledExecutorService;
  29 import java.util.concurrent.TimeUnit;
  30 import java.util.concurrent.TimeoutException;
  31 import java.util.stream.Collectors;
  32 import java.util.stream.IntStream;
  33
  34 import org.eclipse.jdt.annotation.NonNullByDefault;
  35 import org.eclipse.jdt.annotation.Nullable;
  36 import org.openhab.binding.nikohomecontrol.internal.protocol.NhcAction;
  37 import org.openhab.binding.nikohomecontrol.internal.protocol.NhcControllerEvent;
  38 import org.openhab.binding.nikohomecontrol.internal.protocol.NhcEnergyMeter;
  39 import org.openhab.binding.nikohomecontrol.internal.protocol.NhcThermostat;
  40 import org.openhab.binding.nikohomecontrol.internal.protocol.NikoHomeControlCommunication;
  41 import org.openhab.binding.nikohomecontrol.internal.protocol.NikoHomeControlConstants.ActionType;
  42 import org.openhab.binding.nikohomecontrol.internal.protocol.nhc2.NhcDevice2.NhcProperty;
  43 import org.openhab.binding.nikohomecontrol.internal.protocol.nhc2.NhcMessage2.NhcMessageParam;
  44 import org.openhab.core.io.transport.mqtt.MqttConnectionObserver;
  45 import org.openhab.core.io.transport.mqtt.MqttConnectionState;
  46 import org.openhab.core.io.transport.mqtt.MqttException;
  47 import org.openhab.core.io.transport.mqtt.MqttMessageSubscriber;
  48 import org.slf4j.Logger;
  49 import org.slf4j.LoggerFactory;
  50
  51 import com.google.gson.FieldNamingPolicy;
  52 import com.google.gson.Gson;
  53 import com.google.gson.GsonBuilder;
  54 import com.google.gson.JsonSyntaxException;
  55 import com.google.gson.reflect.TypeToken;
  56
  57 /**
  58  * The {@link NikoHomeControlCommunication2} class is able to do the following tasks with Niko Home Control II
  59  * systems:
  60  * <ul>
  61  * <li>Start and stop MQTT connection with Niko Home Control II Connected Controller.
  62  * <li>Read all setup and status information from the Niko Home Control Controller.
  63  * <li>Execute Niko Home Control commands.
  64  * <li>Listen for events from Niko Home Control.
  65  * </ul>
  66  *
  67  * @author Mark Herwege - Initial Contribution
  68  */
  69 @NonNullByDefault
  70 public class NikoHomeControlCommunication2 extends NikoHomeControlCommunication
  71         implements MqttMessageSubscriber, MqttConnectionObserver {
  72
  73     private final Logger logger = LoggerFactory.getLogger(NikoHomeControlCommunication2.class);
  74
  75     private final NhcMqttConnection2 mqttConnection;
  76
  77     private final List<NhcService2> services = new CopyOnWriteArrayList<>();
  78
  79     private volatile String profile = "";
  80
  81     private volatile @Nullable NhcSystemInfo2 nhcSystemInfo;
  82     private volatile @Nullable NhcTimeInfo2 nhcTimeInfo;
  83
  84     private volatile @Nullable CompletableFuture<Boolean> communicationStarted;
  85
  86     private ScheduledExecutorService scheduler;
  87
  88     private final Gson gson = new GsonBuilder().setFieldNamingPolicy(FieldNamingPolicy.UPPER_CAMEL_CASE).create();
  89
  90     /**
  91      * Constructor for Niko Home Control communication object, manages communication with
  92      * Niko Home Control II Connected Controller.
  93      *
  94      * @throws CertificateException when the SSL context for MQTT communication cannot be created
  95      * @throws UnknownHostException when the IP address is not provided
  96      *
  97      */
  98     public NikoHomeControlCommunication2(NhcControllerEvent handler, String clientId,
  99             ScheduledExecutorService scheduler) throws CertificateException {
 100         super(handler);
 101         mqttConnection = new NhcMqttConnection2(clientId, this, this);
 102         this.scheduler = scheduler;
 103     }
 104
 105     @Override
 106     public synchronized void startCommunication() {
 107         communicationStarted = new CompletableFuture<>();
 108
 109         InetAddress addr = handler.getAddr();
 110         if (addr == null) {
 111             logger.warn("IP address cannot be empty");
 112             stopCommunication();
 113             return;
 114         }
 115         String addrString = addr.getHostAddress();
 116         int port = handler.getPort();
 117         logger.debug("initializing for mqtt connection to CoCo on {}:{}", addrString, port);
 118
 119         profile = handler.getProfile();
 120
 121         String token = handler.getToken();
 122         if (token.isEmpty()) {
 123             logger.warn("JWT token cannot be empty");
 124             stopCommunication();
 125             return;
 126         }
 127
 128         try {
 129             mqttConnection.startConnection(addrString, port, profile, token);
 130             initialize();
 131         } catch (MqttException e) {
 132             logger.debug("error in mqtt communication");
 133             stopCommunication();
 134         }
 135     }
 136
 137     @Override
 138     public synchronized void stopCommunication() {
 139         CompletableFuture<Boolean> started = communicationStarted;
 140         if (started != null) {
 141             started.complete(false);
 142         }
 143         communicationStarted = null;
 144         mqttConnection.stopConnection();
 145     }
 146
 147     @Override
 148     public boolean communicationActive() {
 149         CompletableFuture<Boolean> started = communicationStarted;
 150         if (started == null) {
 151             return false;
 152         }
 153         try {
 154             // Wait until we received all devices info to confirm we are active.
 155             return started.get(5000, TimeUnit.MILLISECONDS);
 156         } catch (InterruptedException | ExecutionException | TimeoutException e) {
 157             logger.debug("exception waiting for connection start");
 158             return false;
 159         }
 160     }
 161
 162     /**
 163      * After setting up the communication with the Niko Home Control Connected Controller, send all initialization
 164      * messages.
 165      *
 166      */
 167     private void initialize() throws MqttException {
 168         NhcMessage2 message = new NhcMessage2();
 169
 170         message.method = "systeminfo.publish";
 171         mqttConnection.connectionPublish(profile + "/system/cmd", gson.toJson(message));
 172
 173         message.method = "services.list";
 174         mqttConnection.connectionPublish(profile + "/authentication/cmd", gson.toJson(message));
 175
 176         message.method = "devices.list";
 177         mqttConnection.connectionPublish(profile + "/control/devices/cmd", gson.toJson(message));
 178
 179         message.method = "notifications.list";
 180         mqttConnection.connectionPublish(profile + "/notification/cmd", gson.toJson(message));
 181     }
 182
 183     private void connectionLost(String message) {
 184         logger.debug("connection lost");
 185         stopCommunication();
 186         handler.controllerOffline(message);
 187     }
 188
 189     private void systemEvt(String response) {
 190         Type messageType = new TypeToken<NhcMessage2>() {
 191         }.getType();
 192         List<NhcTimeInfo2> timeInfo = null;
 193         List<NhcSystemInfo2> systemInfo = null;
 194         try {
 195             NhcMessage2 message = gson.fromJson(response, messageType);
 196             List<NhcMessageParam> messageParams = (message != null) ? message.params : null;
 197             if (messageParams != null) {
 198                 timeInfo = messageParams.stream().filter(p -> (p.timeInfo != null)).findFirst().get().timeInfo;
 199                 systemInfo = messageParams.stream().filter(p -> (p.systemInfo != null)).findFirst().get().systemInfo;
 200             }
 201         } catch (JsonSyntaxException e) {
 202             logger.debug("unexpected json {}", response);
 203         } catch (NoSuchElementException ignore) {
 204             // Ignore if timeInfo not present in response, this should not happen in a timeInfo response
 205         }
 206         if (timeInfo != null) {
 207             nhcTimeInfo = timeInfo.get(0);
 208         }
 209         if (systemInfo != null) {
 210             nhcSystemInfo = systemInfo.get(0);
 211             handler.updatePropertiesEvent();
 212         }
 213     }
 214
 215     private void systeminfoPublishRsp(String response) {
 216         Type messageType = new TypeToken<NhcMessage2>() {
 217         }.getType();
 218         List<NhcSystemInfo2> systemInfo = null;
 219         try {
 220             NhcMessage2 message = gson.fromJson(response, messageType);
 221             List<NhcMessageParam> messageParams = (message != null) ? message.params : null;
 222             if (messageParams != null) {
 223                 systemInfo = messageParams.stream().filter(p -> (p.systemInfo != null)).findFirst().get().systemInfo;
 224             }
 225         } catch (JsonSyntaxException e) {
 226             logger.debug("unexpected json {}", response);
 227         } catch (NoSuchElementException ignore) {
 228             // Ignore if systemInfo not present in response, this should not happen in a systemInfo response
 229         }
 230         if (systemInfo != null) {
 231             nhcSystemInfo = systemInfo.get(0);
 232         }
 233     }
 234
 235     private void servicesListRsp(String response) {
 236         Type messageType = new TypeToken<NhcMessage2>() {
 237         }.getType();
 238         List<NhcService2> serviceList = null;
 239         try {
 240             NhcMessage2 message = gson.fromJson(response, messageType);
 241             List<NhcMessageParam> messageParams = (message != null) ? message.params : null;
 242             if (messageParams != null) {
 243                 serviceList = messageParams.stream().filter(p -> (p.services != null)).findFirst().get().services;
 244             }
 245         } catch (JsonSyntaxException e) {
 246             logger.debug("unexpected json {}", response);
 247         } catch (NoSuchElementException ignore) {
 248             // Ignore if services not present in response, this should not happen in a services response
 249         }
 250         services.clear();
 251         if (serviceList != null) {
 252             services.addAll(serviceList);
 253         }
 254     }
 255
 256     private void devicesListRsp(String response) {
 257         Type messageType = new TypeToken<NhcMessage2>() {
 258         }.getType();
 259         List<NhcDevice2> deviceList = null;
 260         try {
 261             NhcMessage2 message = gson.fromJson(response, messageType);
 262             List<NhcMessageParam> messageParams = (message != null) ? message.params : null;
 263             if (messageParams != null) {
 264                 deviceList = messageParams.stream().filter(p -> (p.devices != null)).findFirst().get().devices;
 265             }
 266         } catch (JsonSyntaxException e) {
 267             logger.debug("unexpected json {}", response);
 268         } catch (NoSuchElementException ignore) {
 269             // Ignore if devices not present in response, this should not happen in a devices response
 270         }
 271         if (deviceList == null) {
 272             return;
 273         }
 274
 275         for (NhcDevice2 device : deviceList) {
 276             addDevice(device);
 277             updateState(device);
 278         }
 279
 280         // Once a devices list response is received, we know the communication is fully started.
 281         logger.debug("Communication start complete.");
 282         handler.controllerOnline();
 283         CompletableFuture<Boolean> future = communicationStarted;
 284         if (future != null) {
 285             future.complete(true);
 286         }
 287     }
 288
 289     private void devicesEvt(String response) {
 290         Type messageType = new TypeToken<NhcMessage2>() {
 291         }.getType();
 292         List<NhcDevice2> deviceList = null;
 293         String method = null;
 294         try {
 295             NhcMessage2 message = gson.fromJson(response, messageType);
 296             method = (message != null) ? message.method : null;
 297             List<NhcMessageParam> messageParams = (message != null) ? message.params : null;
 298             if (messageParams != null) {
 299                 deviceList = messageParams.stream().filter(p -> (p.devices != null)).findFirst().get().devices;
 300             }
 301         } catch (JsonSyntaxException e) {
 302             logger.debug("unexpected json {}", response);
 303         } catch (NoSuchElementException ignore) {
 304             // Ignore if devices not present in response, this should not happen in a devices event
 305         }
 306         if (deviceList == null) {
 307             return;
 308         }
 309
 310         if ("devices.removed".equals(method)) {
 311             deviceList.forEach(this::removeDevice);
 312             return;
 313         } else if ("devices.added".equals(method)) {
 314             deviceList.forEach(this::addDevice);
 315         }
 316
 317         deviceList.forEach(this::updateState);
 318     }
 319
 320     private void notificationEvt(String response) {
 321         Type messageType = new TypeToken<NhcMessage2>() {
 322         }.getType();
 323         List<NhcNotification2> notificationList = null;
 324         try {
 325             NhcMessage2 message = gson.fromJson(response, messageType);
 326             List<NhcMessageParam> messageParams = (message != null) ? message.params : null;
 327             if (messageParams != null) {
 328                 notificationList = messageParams.stream().filter(p -> (p.notifications != null)).findFirst()
 329                         .get().notifications;
 330             }
 331         } catch (JsonSyntaxException e) {
 332             logger.debug("unexpected json {}", response);
 333         } catch (NoSuchElementException ignore) {
 334             // Ignore if notifications not present in response, this should not happen in a notifications event
 335         }
 336         logger.debug("notifications {}", notificationList);
 337         if (notificationList == null) {
 338             return;
 339         }
 340
 341         for (NhcNotification2 notification : notificationList) {
 342             if ("new".equals(notification.status)) {
 343                 String alarmText = notification.text;
 344                 switch (notification.type) {
 345                     case "alarm":
 346                         handler.alarmEvent(alarmText);
 347                         break;
 348                     case "notification":
 349                         handler.noticeEvent(alarmText);
 350                         break;
 351                     default:
 352                         logger.debug("unexpected message type {}", notification.type);
 353                 }
 354             }
 355         }
 356     }
 357
 358     private void addDevice(NhcDevice2 device) {
 359         String location = null;
 360         if (device.parameters != null) {
 361             location = device.parameters.stream().map(p -> p.locationName).filter(Objects::nonNull).findFirst()
 362                     .orElse(null);
 363         }
 364
 365         if ("action".equals(device.type)) {
 366             if (!actions.containsKey(device.uuid)) {
 367                 logger.debug("adding action device {}, {}", device.uuid, device.name);
 368
 369                 ActionType actionType;
 370                 switch (device.model) {
 371                     case "generic":
 372                     case "pir":
 373                     case "simulation":
 374                     case "comfort":
 375                     case "alarms":
 376                     case "alloff":
 377                     case "overallcomfort":
 378                     case "garagedoor":
 379                         actionType = ActionType.TRIGGER;
 380                         break;
 381                     case "light":
 382                     case "socket":
 383                     case "switched-generic":
 384                     case "switched-fan":
 385                         actionType = ActionType.RELAY;
 386                         break;
 387                     case "dimmer":
 388                         actionType = ActionType.DIMMER;
 389                         break;
 390                     case "rolldownshutter":
 391                     case "sunblind":
 392                     case "venetianblind":
 393                     case "gate":
 394                         actionType = ActionType.ROLLERSHUTTER;
 395                         break;
 396                     default:
 397                         actionType = ActionType.GENERIC;
 398                         logger.debug("device type {} not recognised, default to GENERIC action", device.type);
 399                 }
 400
 401                 NhcAction2 nhcAction = new NhcAction2(device.uuid, device.name, device.model, device.technology,
 402                         actionType, location, this);
 403                 actions.put(device.uuid, nhcAction);
 404             }
 405         } else if ("thermostat".equals(device.type)) {
 406             if (!thermostats.containsKey(device.uuid)) {
 407                 logger.debug("adding thermostat device {}, {}", device.uuid, device.name);
 408
 409                 NhcThermostat2 nhcThermostat = new NhcThermostat2(device.uuid, device.name, device.model,
 410                         device.technology, location, this);
 411                 thermostats.put(device.uuid, nhcThermostat);
 412             }
 413         } else if ("centralmeter".equals(device.type)) {
 414             if (!energyMeters.containsKey(device.uuid)) {
 415                 logger.debug("adding centralmeter device {}, {}", device.uuid, device.name);
 416                 NhcEnergyMeter2 nhcEnergyMeter = new NhcEnergyMeter2(device.uuid, device.name, device.model,
 417                         device.technology, this, scheduler);
 418                 energyMeters.put(device.uuid, nhcEnergyMeter);
 419             }
 420         } else {
 421             logger.debug("device type {} not supported for {}, {}", device.type, device.uuid, device.name);
 422         }
 423     }
 424
 425     private void removeDevice(NhcDevice2 device) {
 426         NhcAction action = actions.get(device.uuid);
 427         NhcThermostat thermostat = thermostats.get(device.uuid);
 428         NhcEnergyMeter energyMeter = energyMeters.get(device.uuid);
 429         if (action != null) {
 430             action.actionRemoved();
 431             actions.remove(device.uuid);
 432         } else if (thermostat != null) {
 433             thermostat.thermostatRemoved();
 434             thermostats.remove(device.uuid);
 435         } else if (energyMeter != null) {
 436             energyMeter.energyMeterRemoved();
 437             energyMeters.remove(device.uuid);
 438         }
 439     }
 440
 441     private void updateState(NhcDevice2 device) {
 442         List<NhcProperty> deviceProperties = device.properties;
 443         if (deviceProperties == null) {
 444             logger.debug("Cannot Update state for {} as no properties defined in device message", device.uuid);
 445             return;
 446         }
 447
 448         NhcAction action = actions.get(device.uuid);
 449         NhcThermostat thermostat = thermostats.get(device.uuid);
 450         NhcEnergyMeter energyMeter = energyMeters.get(device.uuid);
 451
 452         if (action != null) {
 453             updateActionState((NhcAction2) action, deviceProperties);
 454         } else if (thermostat != null) {
 455             updateThermostatState((NhcThermostat2) thermostat, deviceProperties);
 456         } else if (energyMeter != null) {
 457             updateEnergyMeterState((NhcEnergyMeter2) energyMeter, deviceProperties);
 458         }
 459     }
 460
 461     private void updateActionState(NhcAction2 action, List<NhcProperty> deviceProperties) {
 462         if (action.getType() == ActionType.ROLLERSHUTTER) {
 463             updateRollershutterState(action, deviceProperties);
 464         } else {
 465             updateLightState(action, deviceProperties);
 466         }
 467     }
 468
 469     private void updateLightState(NhcAction2 action, List<NhcProperty> deviceProperties) {
 470         Optional<NhcProperty> statusProperty = deviceProperties.stream().filter(p -> (p.status != null)).findFirst();
 471         Optional<NhcProperty> dimmerProperty = deviceProperties.stream().filter(p -> (p.brightness != null))
 472                 .findFirst();
 473         Optional<NhcProperty> basicStateProperty = deviceProperties.stream().filter(p -> (p.basicState != null))
 474                 .findFirst();
 475
 476         String booleanState = null;
 477         if (statusProperty.isPresent()) {
 478             booleanState = statusProperty.get().status;
 479         } else if (basicStateProperty.isPresent()) {
 480             booleanState = basicStateProperty.get().basicState;
 481         }
 482
 483         if (booleanState != null) {
 484             if (NHCON.equals(booleanState)) {
 485                 action.setBooleanState(true);
 486                 logger.debug("setting action {} internally to ON", action.getId());
 487             } else if (NHCOFF.equals(booleanState)) {
 488                 action.setBooleanState(false);
 489                 logger.debug("setting action {} internally to OFF", action.getId());
 490             }
 491         }
 492
 493         if (dimmerProperty.isPresent()) {
 494             String brightness = dimmerProperty.get().brightness;
 495             if (brightness != null) {
 496                 action.setState(Integer.parseInt(brightness));
 497                 logger.debug("setting action {} internally to {}", action.getId(), dimmerProperty.get().brightness);
 498             }
 499         }
 500     }
 501
 502     private void updateRollershutterState(NhcAction2 action, List<NhcProperty> deviceProperties) {
 503         deviceProperties.stream().map(p -> p.position).filter(Objects::nonNull).findFirst().ifPresent(position -> {
 504             try {
 505                 action.setState(Integer.parseInt(position));
 506                 logger.debug("setting action {} internally to {}", action.getId(), position);
 507             } catch (NumberFormatException e) {
 508                 logger.trace("received empty rollershutter {} position info", action.getId());
 509             }
 510         });
 511     }
 512
 513     private void updateThermostatState(NhcThermostat2 thermostat, List<NhcProperty> deviceProperties) {
 514         Optional<Boolean> overruleActiveProperty = deviceProperties.stream().map(p -> p.overruleActive)
 515                 .filter(Objects::nonNull).map(t -> Boolean.parseBoolean(t)).findFirst();
 516         Optional<Integer> overruleSetpointProperty = deviceProperties.stream().map(p -> p.overruleSetpoint)
 517                 .map(s -> (!((s == null) || s.isEmpty())) ? Math.round(Float.parseFloat(s) * 10) : null)
 518                 .filter(Objects::nonNull).findFirst();
 519         Optional<Integer> overruleTimeProperty = deviceProperties.stream().map(p -> p.overruleTime)
 520                 .map(s -> (!((s == null) || s.isEmpty())) ? Math.round(Float.parseFloat(s)) : null)
 521                 .filter(Objects::nonNull).findFirst();
 522         Optional<Integer> setpointTemperatureProperty = deviceProperties.stream().map(p -> p.setpointTemperature)
 523                 .map(s -> (!((s == null) || s.isEmpty())) ? Math.round(Float.parseFloat(s) * 10) : null)
 524                 .filter(Objects::nonNull).findFirst();
 525         Optional<Boolean> ecoSaveProperty = deviceProperties.stream().map(p -> p.ecoSave)
 526                 .map(s -> s != null ? Boolean.parseBoolean(s) : null).filter(Objects::nonNull).findFirst();
 527         Optional<Integer> ambientTemperatureProperty = deviceProperties.stream().map(p -> p.ambientTemperature)
 528                 .map(s -> (!((s == null) || s.isEmpty())) ? Math.round(Float.parseFloat(s) * 10) : null)
 529                 .filter(Objects::nonNull).findFirst();
 530         Optional<@Nullable String> demandProperty = deviceProperties.stream().map(p -> p.demand)
 531                 .filter(Objects::nonNull).findFirst();
 532         Optional<@Nullable String> operationModeProperty = deviceProperties.stream().map(p -> p.operationMode)
 533                 .filter(Objects::nonNull).findFirst();
 534
 535         String modeString = deviceProperties.stream().map(p -> p.program).filter(Objects::nonNull).findFirst()
 536                 .orElse("");
 537         int mode = IntStream.range(0, THERMOSTATMODES.length).filter(i -> THERMOSTATMODES[i].equals(modeString))
 538                 .findFirst().orElse(thermostat.getMode());
 539
 540         int measured = ambientTemperatureProperty.orElse(thermostat.getMeasured());
 541         int setpoint = setpointTemperatureProperty.orElse(thermostat.getSetpoint());
 542
 543         int overrule = thermostat.getOverrule();
 544         int overruletime = thermostat.getRemainingOverruletime();
 545         if (overruleActiveProperty.orElse(false)) {
 546             overrule = overruleSetpointProperty.orElse(0);
 547             overruletime = overruleTimeProperty.orElse(0);
 548         }
 549
 550         int ecosave = thermostat.getEcosave();
 551         if (ecoSaveProperty.orElse(false)) {
 552             ecosave = 1;
 553         }
 554
 555         int demand = thermostat.getDemand();
 556         String demandString = demandProperty.orElse(operationModeProperty.orElse(""));
 557         demandString = demandString == null ? "" : demandString;
 558         switch (demandString) {
 559             case "None":
 560                 demand = 0;
 561                 break;
 562             case "Heating":
 563                 demand = 1;
 564                 break;
 565             case "Cooling":
 566                 demand = -1;
 567                 break;
 568         }
 569
 570         logger.debug(
 571                 "Niko Home Control: setting thermostat {} with measured {}, setpoint {}, mode {}, overrule {}, overruletime {}, ecosave {}, demand {}",
 572                 thermostat.getId(), measured, setpoint, mode, overrule, overruletime, ecosave, demand);
 573         thermostat.updateState(measured, setpoint, mode, overrule, overruletime, ecosave, demand);
 574     }
 575
 576     private void updateEnergyMeterState(NhcEnergyMeter2 energyMeter, List<NhcProperty> deviceProperties) {
 577         deviceProperties.stream().map(p -> p.electricalPower).filter(Objects::nonNull).findFirst()
 578                 .ifPresent(electricalPower -> {
 579                     try {
 580                         // Sometimes API sends a fractional part, although API should only send whole units in W,
 581                         // therefore drop fractional part
 582                         energyMeter.setPower((int) Double.parseDouble(electricalPower));
 583                         logger.trace("setting energy meter {} power to {}", energyMeter.getId(), electricalPower);
 584                     } catch (NumberFormatException e) {
 585                         energyMeter.setPower(null);
 586                         logger.trace("received empty energy meter {} power reading", energyMeter.getId());
 587                     }
 588                 });
 589     }
 590
 591     @Override
 592     public void executeAction(String actionId, String value) {
 593         NhcMessage2 message = new NhcMessage2();
 594
 595         message.method = "devices.control";
 596         ArrayList<NhcMessageParam> params = new ArrayList<>();
 597         NhcMessageParam param = new NhcMessageParam();
 598         params.add(param);
 599         message.params = params;
 600         ArrayList<NhcDevice2> devices = new ArrayList<>();
 601         NhcDevice2 device = new NhcDevice2();
 602         devices.add(device);
 603         param.devices = devices;
 604         device.uuid = actionId;
 605         ArrayList<NhcProperty> deviceProperties = new ArrayList<>();
 606         NhcProperty property = new NhcProperty();
 607         deviceProperties.add(property);
 608         device.properties = deviceProperties;
 609
 610         NhcAction2 action = (NhcAction2) actions.get(actionId);
 611         if (action == null) {
 612             return;
 613         }
 614
 615         switch (action.getType()) {
 616             case GENERIC:
 617             case TRIGGER:
 618                 property.basicState = NHCTRIGGERED;
 619                 break;
 620             case RELAY:
 621                 property.status = value;
 622                 break;
 623             case DIMMER:
 624                 if (NHCON.equals(value)) {
 625                     action.setBooleanState(true); // this will trigger sending the stored brightness value event out
 626                     property.status = value;
 627                 } else if (NHCOFF.equals(value)) {
 628                     property.status = value;
 629                 } else {
 630                     // If the light is off, turn the light on before sending the brightness value, needs to happen
 631                     // in 2 separate messages.
 632                     if (!action.booleanState()) {
 633                         executeAction(actionId, NHCON);
 634                     }
 635                     property.brightness = value;
 636                 }
 637                 break;
 638             case ROLLERSHUTTER:
 639                 if (NHCSTOP.equals(value)) {
 640                     property.action = value;
 641                 } else if (NHCUP.equals(value)) {
 642                     property.position = "100";
 643                 } else if (NHCDOWN.equals(value)) {
 644                     property.position = "0";
 645                 } else {
 646                     int position = Integer.parseInt(value);
 647                     property.position = String.valueOf(position);
 648                 }
 649                 break;
 650         }
 651
 652         String topic = profile + "/control/devices/cmd";
 653         String gsonMessage = gson.toJson(message);
 654         sendDeviceMessage(topic, gsonMessage);
 655     }
 656
 657     @Override
 658     public void executeThermostat(String thermostatId, String mode) {
 659         NhcMessage2 message = new NhcMessage2();
 660
 661         message.method = "devices.control";
 662         ArrayList<NhcMessageParam> params = new ArrayList<>();
 663         NhcMessageParam param = new NhcMessageParam();
 664         params.add(param);
 665         message.params = params;
 666         ArrayList<NhcDevice2> devices = new ArrayList<>();
 667         NhcDevice2 device = new NhcDevice2();
 668         devices.add(device);
 669         param.devices = devices;
 670         device.uuid = thermostatId;
 671         ArrayList<NhcProperty> deviceProperties = new ArrayList<>();
 672
 673         NhcProperty overruleActiveProp = new NhcProperty();
 674         deviceProperties.add(overruleActiveProp);
 675         overruleActiveProp.overruleActive = "False";
 676
 677         NhcProperty program = new NhcProperty();
 678         deviceProperties.add(program);
 679         program.program = mode;
 680
 681         device.properties = deviceProperties;
 682
 683         String topic = profile + "/control/devices/cmd";
 684         String gsonMessage = gson.toJson(message);
 685         sendDeviceMessage(topic, gsonMessage);
 686     }
 687
 688     @Override
 689     public void executeThermostat(String thermostatId, int overruleTemp, int overruleTime) {
 690         NhcMessage2 message = new NhcMessage2();
 691
 692         message.method = "devices.control";
 693         ArrayList<NhcMessageParam> params = new ArrayList<>();
 694         NhcMessageParam param = new NhcMessageParam();
 695         params.add(param);
 696         message.params = params;
 697         ArrayList<NhcDevice2> devices = new ArrayList<>();
 698         NhcDevice2 device = new NhcDevice2();
 699         devices.add(device);
 700         param.devices = devices;
 701         device.uuid = thermostatId;
 702         ArrayList<NhcProperty> deviceProperties = new ArrayList<>();
 703
 704         if (overruleTime > 0) {
 705             NhcProperty overruleActiveProp = new NhcProperty();
 706             overruleActiveProp.overruleActive = "True";
 707             deviceProperties.add(overruleActiveProp);
 708
 709             NhcProperty overruleSetpointProp = new NhcProperty();
 710             overruleSetpointProp.overruleSetpoint = String.valueOf(overruleTemp / 10.0);
 711             deviceProperties.add(overruleSetpointProp);
 712
 713             NhcProperty overruleTimeProp = new NhcProperty();
 714             overruleTimeProp.overruleTime = String.valueOf(overruleTime);
 715             deviceProperties.add(overruleTimeProp);
 716         } else {
 717             NhcProperty overruleActiveProp = new NhcProperty();
 718             overruleActiveProp.overruleActive = "False";
 719             deviceProperties.add(overruleActiveProp);
 720         }
 721         device.properties = deviceProperties;
 722
 723         String topic = profile + "/control/devices/cmd";
 724         String gsonMessage = gson.toJson(message);
 725         sendDeviceMessage(topic, gsonMessage);
 726     }
 727
 728     @Override
 729     public void startEnergyMeter(String energyMeterId) {
 730         NhcMessage2 message = new NhcMessage2();
 731
 732         message.method = "devices.control";
 733         ArrayList<NhcMessageParam> params = new ArrayList<>();
 734         NhcMessageParam param = new NhcMessageParam();
 735         params.add(param);
 736         message.params = params;
 737         ArrayList<NhcDevice2> devices = new ArrayList<>();
 738         NhcDevice2 device = new NhcDevice2();
 739         devices.add(device);
 740         param.devices = devices;
 741         device.uuid = energyMeterId;
 742         ArrayList<NhcProperty> deviceProperties = new ArrayList<>();
 743
 744         NhcProperty reportInstantUsageProp = new NhcProperty();
 745         deviceProperties.add(reportInstantUsageProp);
 746         reportInstantUsageProp.reportInstantUsage = "True";
 747         device.properties = deviceProperties;
 748
 749         String topic = profile + "/control/devices/cmd";
 750         String gsonMessage = gson.toJson(message);
 751
 752         NhcEnergyMeter2 energyMeter = (NhcEnergyMeter2) energyMeters.get(energyMeterId);
 753         if (energyMeter != null) {
 754             energyMeter.startEnergyMeter(topic, gsonMessage);
 755         }
 756     }
 757
 758     @Override
 759     public void stopEnergyMeter(String energyMeterId) {
 760         NhcEnergyMeter2 energyMeter = (NhcEnergyMeter2) energyMeters.get(energyMeterId);
 761         if (energyMeter != null) {
 762             energyMeter.stopEnergyMeter();
 763         }
 764     }
 765
 766     /**
 767      * Method called from the {@link NhcEnergyMeter2} object to send message to Niko Home Control.
 768      *
 769      * @param topic
 770      * @param gsonMessage
 771      */
 772     public void executeEnergyMeter(String topic, String gsonMessage) {
 773         sendDeviceMessage(topic, gsonMessage);
 774     }
 775
 776     private void sendDeviceMessage(String topic, String gsonMessage) {
 777         try {
 778             mqttConnection.connectionPublish(topic, gsonMessage);
 779
 780         } catch (MqttException e) {
 781             String message = e.getLocalizedMessage();
 782
 783             logger.debug("sending command failed, trying to restart communication");
 784             restartCommunication();
 785             // retry sending after restart
 786             try {
 787                 if (communicationActive()) {
 788                     mqttConnection.connectionPublish(topic, gsonMessage);
 789                 } else {
 790                     logger.debug("failed to restart communication");
 791                 }
 792             } catch (MqttException e1) {
 793                 message = e1.getLocalizedMessage();
 794
 795                 logger.debug("error resending device command");
 796             }
 797             if (!communicationActive()) {
 798                 message = (message != null) ? message : "@text/offline.communication-error";
 799                 connectionLost(message);
 800             }
 801         }
 802     }
 803
 804     @Override
 805     public void processMessage(String topic, byte[] payload) {
 806         String message = new String(payload);
 807         if ((profile + "/system/evt").equals(topic)) {
 808             systemEvt(message);
 809         } else if ((profile + "/system/rsp").equals(topic)) {
 810             logger.debug("received topic {}, payload {}", topic, message);
 811             systeminfoPublishRsp(message);
 812         } else if ((profile + "/notification/evt").equals(topic)) {
 813             logger.debug("received topic {}, payload {}", topic, message);
 814             notificationEvt(message);
 815         } else if ((profile + "/control/devices/evt").equals(topic)) {
 816             logger.trace("received topic {}, payload {}", topic, message);
 817             devicesEvt(message);
 818         } else if ((profile + "/control/devices/rsp").equals(topic)) {
 819             logger.debug("received topic {}, payload {}", topic, message);
 820             devicesListRsp(message);
 821         } else if ((profile + "/authentication/rsp").equals(topic)) {
 822             logger.debug("received topic {}, payload {}", topic, message);
 823             servicesListRsp(message);
 824         } else if ((profile + "/control/devices.error").equals(topic)) {
 825             logger.warn("received error {}", message);
 826         } else {
 827             logger.trace("not acted on received message topic {}, payload {}", topic, message);
 828         }
 829     }
 830
 831     /**
 832      * @return system info retrieved from Connected Controller
 833      */
 834     public NhcSystemInfo2 getSystemInfo() {
 835         NhcSystemInfo2 systemInfo = nhcSystemInfo;
 836         if (systemInfo == null) {
 837             systemInfo = new NhcSystemInfo2();
 838         }
 839         return systemInfo;
 840     }
 841
 842     /**
 843      * @return time info retrieved from Connected Controller
 844      */
 845     public NhcTimeInfo2 getTimeInfo() {
 846         NhcTimeInfo2 timeInfo = nhcTimeInfo;
 847         if (timeInfo == null) {
 848             timeInfo = new NhcTimeInfo2();
 849         }
 850         return timeInfo;
 851     }
 852
 853     /**
 854      * @return comma separated list of services retrieved from Connected Controller
 855      */
 856     public String getServices() {
 857         return services.stream().map(NhcService2::name).collect(Collectors.joining(", "));
 858     }
 859
 860     @Override
 861     public void connectionStateChanged(MqttConnectionState state, @Nullable Throwable error) {
 862         if (error != null) {
 863             logger.debug("Connection state: {}", state, error);
 864             String message = error.getLocalizedMessage();
 865             message = (message != null) ? message : "@text/offline.communication-error";
 866             if (!MqttConnectionState.CONNECTING.equals(state)) {
 867                 // This is a connection loss, try to restart
 868                 restartCommunication();
 869             }
 870             if (!communicationActive()) {
 871                 connectionLost(message);
 872             }
 873         } else {
 874             logger.trace("Connection state: {}", state);
 875         }
 876     }
 877 }