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   1 /**
   2  * Copyright (c) 2010-2022 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.nibeheatpump.internal.handler;
  14
  15 import static org.openhab.binding.nibeheatpump.internal.NibeHeatPumpBindingConstants.*;
  16
  17 import java.math.BigDecimal;
  18 import java.math.RoundingMode;
  19 import java.util.ArrayList;
  20 import java.util.Collections;
  21 import java.util.HashMap;
  22 import java.util.List;
  23 import java.util.Map;
  24 import java.util.concurrent.ScheduledFuture;
  25 import java.util.concurrent.TimeUnit;
  26 import java.util.concurrent.TimeoutException;
  27 import java.util.stream.Collectors;
  28
  29 import org.openhab.binding.nibeheatpump.internal.NibeHeatPumpCommandResult;
  30 import org.openhab.binding.nibeheatpump.internal.NibeHeatPumpException;
  31 import org.openhab.binding.nibeheatpump.internal.config.NibeHeatPumpConfiguration;
  32 import org.openhab.binding.nibeheatpump.internal.connection.NibeHeatPumpConnector;
  33 import org.openhab.binding.nibeheatpump.internal.connection.NibeHeatPumpEventListener;
  34 import org.openhab.binding.nibeheatpump.internal.connection.SerialConnector;
  35 import org.openhab.binding.nibeheatpump.internal.connection.SimulatorConnector;
  36 import org.openhab.binding.nibeheatpump.internal.connection.UDPConnector;
  37 import org.openhab.binding.nibeheatpump.internal.message.ModbusDataReadOutMessage;
  38 import org.openhab.binding.nibeheatpump.internal.message.ModbusReadRequestMessage;
  39 import org.openhab.binding.nibeheatpump.internal.message.ModbusReadResponseMessage;
  40 import org.openhab.binding.nibeheatpump.internal.message.ModbusValue;
  41 import org.openhab.binding.nibeheatpump.internal.message.ModbusWriteRequestMessage;
  42 import org.openhab.binding.nibeheatpump.internal.message.ModbusWriteResponseMessage;
  43 import org.openhab.binding.nibeheatpump.internal.message.NibeHeatPumpMessage;
  44 import org.openhab.binding.nibeheatpump.internal.models.PumpModel;
  45 import org.openhab.binding.nibeheatpump.internal.models.VariableInformation;
  46 import org.openhab.binding.nibeheatpump.internal.models.VariableInformation.NibeDataType;
  47 import org.openhab.binding.nibeheatpump.internal.models.VariableInformation.Type;
  48 import org.openhab.core.io.transport.serial.SerialPortManager;
  49 import org.openhab.core.library.types.DecimalType;
  50 import org.openhab.core.library.types.OnOffType;
  51 import org.openhab.core.library.types.OpenClosedType;
  52 import org.openhab.core.library.types.QuantityType;
  53 import org.openhab.core.library.types.StringType;
  54 import org.openhab.core.library.types.UpDownType;
  55 import org.openhab.core.thing.ChannelUID;
  56 import org.openhab.core.thing.Thing;
  57 import org.openhab.core.thing.ThingStatus;
  58 import org.openhab.core.thing.ThingStatusDetail;
  59 import org.openhab.core.thing.ThingTypeUID;
  60 import org.openhab.core.thing.binding.BaseThingHandler;
  61 import org.openhab.core.types.Command;
  62 import org.openhab.core.types.RefreshType;
  63 import org.openhab.core.types.State;
  64 import org.openhab.core.types.UnDefType;
  65 import org.slf4j.Logger;
  66 import org.slf4j.LoggerFactory;
  67
  68 /**
  69  * The {@link NibeHeatPumpHandler} is responsible for handling commands, which
  70  * are sent to one of the channels.
  71  *
  72  * @author Pauli Anttila - Initial contribution
  73  */
  74 public class NibeHeatPumpHandler extends BaseThingHandler implements NibeHeatPumpEventListener {
  75
  76     private static final int TIMEOUT = 4500;
  77     private final Logger logger = LoggerFactory.getLogger(NibeHeatPumpHandler.class);
  78     private final PumpModel pumpModel;
  79     private final SerialPortManager serialPortManager;
  80     private final List<Integer> itemsToPoll = Collections.synchronizedList(new ArrayList<>());
  81     private final List<Integer> itemsToEnableWrite = new ArrayList<>();
  82     private final Map<Integer, CacheObject> stateMap = Collections.synchronizedMap(new HashMap<>());
  83     private NibeHeatPumpConfiguration configuration;
  84     private NibeHeatPumpConnector connector;
  85     private boolean reconnectionRequest;
  86     private NibeHeatPumpCommandResult writeResult;
  87     private NibeHeatPumpCommandResult readResult;
  88     private final Runnable pollingRunnable = new Runnable() {
  89         @Override
  90         public void run() {
  91             if (!configuration.enableReadCommands) {
  92                 logger.trace("All read commands denied, skip polling!");
  93                 return;
  94             }
  95
  96             List<Integer> items;
  97             synchronized (itemsToPoll) {
  98                 items = new ArrayList<>(itemsToPoll);
  99             }
 100
 101             for (int item : items) {
 102                 if (connector != null && connector.isConnected()
 103                         && getThing().getStatusInfo().getStatus() == ThingStatus.ONLINE) {
 104                     CacheObject oldValue = stateMap.get(item);
 105                     if (oldValue == null
 106                             || (oldValue.lastUpdateTime + refreshIntervalMillis()) < System.currentTimeMillis()) {
 107                         // it's time to refresh data
 108                         logger.debug("Time to refresh variable '{}' data", item);
 109
 110                         ModbusReadRequestMessage request = new ModbusReadRequestMessage.MessageBuilder()
 111                                 .coilAddress(item).build();
 112
 113                         try {
 114                             readResult = sendMessageToNibe(request);
 115                             ModbusReadResponseMessage result = (ModbusReadResponseMessage) readResult.get(TIMEOUT,
 116                                     TimeUnit.MILLISECONDS);
 117                             if (result != null) {
 118                                 if (request.getCoilAddress() != result.getCoilAddress()) {
 119                                     logger.debug("Data from wrong register '{}' received, expected '{}'",
 120                                             result.getCoilAddress(), request.getCoilAddress());
 121                                 }
 122                                 // update variable anyway
 123                                 handleVariableUpdate(pumpModel, result.getValueAsModbusValue());
 124                             }
 125                         } catch (TimeoutException e) {
 126                             logger.debug("Message sending to heat pump failed, no response");
 127                             updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.COMMUNICATION_ERROR);
 128                         } catch (InterruptedException e) {
 129                             logger.debug("Message sending to heat pump failed, sending interrupted");
 130                         } catch (NibeHeatPumpException e) {
 131                             logger.debug("Message sending to heat pump failed, exception {}", e.getMessage());
 132                             updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.COMMUNICATION_ERROR);
 133                         } finally {
 134                             readResult = null;
 135                         }
 136                     }
 137                 }
 138             }
 139         }
 140     };
 141     private ScheduledFuture<?> connectorTask;
 142     private ScheduledFuture<?> pollingJob;
 143     private long lastUpdateTime = 0;
 144
 145     public NibeHeatPumpHandler(Thing thing, PumpModel pumpModel, SerialPortManager serialPortManager) {
 146         super(thing);
 147         this.pumpModel = pumpModel;
 148         this.serialPortManager = serialPortManager;
 149     }
 150
 151     private NibeHeatPumpConnector getConnector() throws NibeHeatPumpException {
 152         ThingTypeUID type = thing.getThingTypeUID();
 153
 154         if (THING_TYPE_F1X45_UDP.equals(type) || THING_TYPE_F1X55_UDP.equals(type) || THING_TYPE_SMO40_UDP.equals(type)
 155                 || THING_TYPE_F750_UDP.equals(type) || THING_TYPE_F470_UDP.equals(type)) {
 156             return new UDPConnector();
 157         } else if (THING_TYPE_F1X45_SERIAL.equals(type) || THING_TYPE_F1X55_SERIAL.equals(type)
 158                 || THING_TYPE_SMO40_SERIAL.equals(type) || THING_TYPE_F750_SERIAL.equals(type)
 159                 || THING_TYPE_F470_SERIAL.equals(type)) {
 160             return new SerialConnector(serialPortManager);
 161         } else if (THING_TYPE_F1X45_SIMULATOR.equals(type) || THING_TYPE_F1X55_SIMULATOR.equals(type)
 162                 || THING_TYPE_SMO40_SIMULATOR.equals(type) || THING_TYPE_F750_SIMULATOR.equals(type)
 163                 || THING_TYPE_F470_SIMULATOR.equals(type)) {
 164             return new SimulatorConnector();
 165         }
 166
 167         String description = String.format("Unknown connector type %s", type);
 168         throw new NibeHeatPumpException(description);
 169     }
 170
 171     @Override
 172     public void handleCommand(ChannelUID channelUID, Command command) {
 173         logger.debug("Received channel: {}, command: {}", channelUID, command);
 174
 175         int coilAddress = parseCoilAddressFromChannelUID(channelUID);
 176
 177         if (command.equals(RefreshType.REFRESH)) {
 178             logger.debug("Clearing cache value for channel '{}' to refresh channel data", channelUID);
 179             clearCache(coilAddress);
 180             return;
 181         }
 182
 183         if (!configuration.enableWriteCommands) {
 184             logger.info(
 185                     "All write commands denied, ignoring command! Change Nibe heat pump binding configuration if you want to enable write commands.");
 186             return;
 187         }
 188
 189         if (!itemsToEnableWrite.contains(coilAddress)) {
 190             logger.info(
 191                     "Write commands to register '{}' not allowed, ignoring command! Add this register to Nibe heat pump binding configuration if you want to enable write commands.",
 192                     coilAddress);
 193             return;
 194         }
 195
 196         if (connector != null) {
 197             VariableInformation variableInfo = VariableInformation.getVariableInfo(pumpModel, coilAddress);
 198             logger.debug("Using variable information for register {}: {}", coilAddress, variableInfo);
 199
 200             if (variableInfo != null && variableInfo.type == VariableInformation.Type.SETTING) {
 201                 try {
 202                     int value = convertCommandToNibeValue(variableInfo, command);
 203
 204                     ModbusWriteRequestMessage msg = new ModbusWriteRequestMessage.MessageBuilder()
 205                             .coilAddress(coilAddress).value(value).build();
 206
 207                     writeResult = sendMessageToNibe(msg);
 208                     ModbusWriteResponseMessage result = (ModbusWriteResponseMessage) writeResult.get(TIMEOUT,
 209                             TimeUnit.MILLISECONDS);
 210                     if (result != null) {
 211                         if (result.isSuccessfull()) {
 212                             logger.debug("Write message sending to heat pump succeeded");
 213                         } else {
 214                             logger.error("Message sending to heat pump failed, value not accepted by the heat pump");
 215                         }
 216                     } else {
 217                         logger.debug("Something weird happen, result for write command is null");
 218                     }
 219                 } catch (TimeoutException e) {
 220                     logger.warn("Message sending to heat pump failed, no response");
 221                     updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.COMMUNICATION_ERROR,
 222                             "No response received from the heat pump");
 223                 } catch (InterruptedException e) {
 224                     logger.debug("Message sending to heat pump failed, sending interrupted");
 225                 } catch (NibeHeatPumpException e) {
 226                     logger.debug("Message sending to heat pump failed, exception {}", e.getMessage());
 227                     updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.COMMUNICATION_ERROR, e.getMessage());
 228                 } catch (CommandTypeNotSupportedException e) {
 229                     logger.warn("Unsupported command type {} received for channel {}, coil address {}.",
 230                             command.getClass().getName(), channelUID.getId(), coilAddress);
 231                 } finally {
 232                     writeResult = null;
 233                 }
 234
 235                 // Clear cache value to refresh coil data from the pump.
 236                 // We might not know if write message have succeed or not, so let's always refresh it.
 237                 logger.debug("Clearing cache value for channel '{}' to refresh channel data", channelUID);
 238                 clearCache(coilAddress);
 239             } else {
 240                 logger.debug("Command to channel '{}' rejected, because item is read only parameter", channelUID);
 241             }
 242         } else {
 243             logger.debug("No connection to heat pump");
 244             updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.HANDLER_MISSING_ERROR);
 245         }
 246     }
 247
 248     @Override
 249     public void channelLinked(ChannelUID channelUID) {
 250         logger.debug("channelLinked: {}", channelUID);
 251
 252         // Add channel to polling loop
 253         int coilAddress = parseCoilAddressFromChannelUID(channelUID);
 254         synchronized (itemsToPoll) {
 255             if (!itemsToPoll.contains(coilAddress)) {
 256                 logger.debug("New channel '{}' found, register '{}'", channelUID.getAsString(), coilAddress);
 257                 itemsToPoll.add(coilAddress);
 258             }
 259         }
 260         clearCache(coilAddress);
 261     }
 262
 263     @Override
 264     public void channelUnlinked(ChannelUID channelUID) {
 265         logger.debug("channelUnlinked: {}", channelUID);
 266
 267         // remove channel from polling loop
 268         int coilAddress = parseCoilAddressFromChannelUID(channelUID);
 269         synchronized (itemsToPoll) {
 270             itemsToPoll.removeIf(c -> c.equals(coilAddress));
 271         }
 272     }
 273
 274     private int parseCoilAddressFromChannelUID(ChannelUID channelUID) {
 275         if (channelUID.getId().contains("#")) {
 276             String[] parts = channelUID.getId().split("#");
 277             return Integer.parseInt(parts[parts.length - 1]);
 278         } else {
 279             return Integer.parseInt(channelUID.getId());
 280         }
 281     }
 282
 283     @Override
 284     public void initialize() {
 285         logger.debug("Initialized Nibe Heat Pump device handler for {}", getThing().getUID());
 286         configuration = getConfigAs(NibeHeatPumpConfiguration.class);
 287         logger.debug("Using configuration: {}", configuration.toString());
 288
 289         try {
 290             parseWriteEnabledItems();
 291             connector = getConnector();
 292         } catch (IllegalArgumentException | NibeHeatPumpException e) {
 293             String description = String.format("Illegal configuration, %s", e.getMessage());
 294             updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.CONFIGURATION_ERROR, description);
 295             return;
 296         }
 297
 298         itemsToPoll.clear();
 299         itemsToPoll.addAll(this.getThing().getChannels().stream().filter(c -> isLinked(c.getUID())).map(c -> {
 300             int coilAddress = parseCoilAddressFromChannelUID(c.getUID());
 301             logger.debug("Linked channel '{}' found, register '{}'", c.getUID().getAsString(), coilAddress);
 302             return coilAddress;
 303         }).filter(c -> c != 0).collect(Collectors.toSet()));
 304
 305         logger.debug("Linked registers {}: {}", itemsToPoll.size(), itemsToPoll);
 306
 307         clearCache();
 308
 309         if (connectorTask == null || connectorTask.isCancelled()) {
 310             connectorTask = scheduler.scheduleWithFixedDelay(() -> {
 311                 if (reconnectionRequest) {
 312                     logger.debug("Restarting requested, restarting...");
 313                     reconnectionRequest = false;
 314                     closeConnection();
 315                 }
 316
 317                 logger.debug("Checking Nibe Heat pump connection, thing status = {}", thing.getStatus());
 318                 connect();
 319             }, 0, 10, TimeUnit.SECONDS);
 320         }
 321     }
 322
 323     private void connect() {
 324         if (!connector.isConnected()) {
 325             logger.debug("Connecting to heat pump");
 326             try {
 327                 connector.addEventListener(this);
 328                 connector.connect(configuration);
 329                 updateStatus(ThingStatus.ONLINE);
 330
 331                 if (pollingJob == null || pollingJob.isCancelled()) {
 332                     logger.debug("Start refresh task, interval={}sec", 1);
 333                     pollingJob = scheduler.scheduleWithFixedDelay(pollingRunnable, 0, 1, TimeUnit.SECONDS);
 334                 }
 335             } catch (NibeHeatPumpException e) {
 336                 logger.debug("Error occurred when connecting to heat pump, exception {}", e.getMessage());
 337                 updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.COMMUNICATION_ERROR, e.getMessage());
 338             }
 339         } else {
 340             logger.debug("Connection to heat pump already open");
 341         }
 342     }
 343
 344     @Override
 345     public void dispose() {
 346         logger.debug("Thing {} disposed.", getThing().getUID());
 347
 348         if (connectorTask != null && !connectorTask.isCancelled()) {
 349             connectorTask.cancel(true);
 350             connectorTask = null;
 351         }
 352
 353         closeConnection();
 354     }
 355
 356     private void closeConnection() {
 357         logger.debug("Closing connection to the heat pump");
 358
 359         if (pollingJob != null && !pollingJob.isCancelled()) {
 360             pollingJob.cancel(true);
 361             pollingJob = null;
 362         }
 363
 364         if (connector != null) {
 365             connector.removeEventListener(this);
 366             connector.disconnect();
 367         }
 368     }
 369
 370     private long refreshIntervalMillis() {
 371         return configuration.refreshInterval * 1000;
 372     }
 373
 374     private int convertCommandToNibeValue(VariableInformation variableInfo, Command command)
 375             throws CommandTypeNotSupportedException {
 376         int value;
 377
 378         if (command instanceof DecimalType || command instanceof QuantityType || command instanceof StringType) {
 379             BigDecimal v;
 380             if (command instanceof DecimalType) {
 381                 v = ((DecimalType) command).toBigDecimal();
 382             } else if (command instanceof QuantityType) {
 383                 v = ((QuantityType) command).toBigDecimal();
 384             } else {
 385                 v = new BigDecimal(command.toString());
 386             }
 387             int decimals = (int) Math.log10(variableInfo.factor);
 388             value = v.movePointRight(decimals).intValue();
 389         } else if ((command instanceof OnOffType || command instanceof OpenClosedType || command instanceof UpDownType)
 390                 && variableInfo.factor == 1) {
 391             value = (command.equals(OnOffType.ON) || command.equals(UpDownType.UP)
 392                     || command.equals(OpenClosedType.OPEN)) ? 1 : 0;
 393         } else {
 394             throw new CommandTypeNotSupportedException();
 395         }
 396
 397         return value;
 398     }
 399
 400     private void parseWriteEnabledItems() throws IllegalArgumentException {
 401         itemsToEnableWrite.clear();
 402         if (configuration.enableWriteCommands && configuration.enableWriteCommandsToRegisters != null
 403                 && configuration.enableWriteCommandsToRegisters.length() > 0) {
 404             String[] items = configuration.enableWriteCommandsToRegisters.replace(" ", "").split(",");
 405             for (String item : items) {
 406                 try {
 407                     int coilAddress = Integer.parseInt(item);
 408                     VariableInformation variableInformation = VariableInformation.getVariableInfo(pumpModel,
 409                             coilAddress);
 410                     if (variableInformation == null) {
 411                         String description = String.format("Unknown register %s", coilAddress);
 412                         throw new IllegalArgumentException(description);
 413                     }
 414                     itemsToEnableWrite.add(coilAddress);
 415                 } catch (NumberFormatException e) {
 416                     String description = String.format("Illegal register %s", item);
 417                     throw new IllegalArgumentException(description);
 418                 }
 419             }
 420         }
 421         logger.debug("Enabled registers for write commands: {}", itemsToEnableWrite);
 422     }
 423
 424     private State convertNibeValueToState(VariableInformation variableInfo, int value, String acceptedItemType) {
 425         State state = UnDefType.UNDEF;
 426         long x;
 427
 428         NibeDataType dataType = variableInfo.dataType;
 429         int decimals = (int) Math.log10(variableInfo.factor);
 430         switch (dataType) {
 431             case U8:
 432                 x = Byte.toUnsignedLong((byte) (value & 0xFF));
 433                 break;
 434             case U16:
 435                 x = Short.toUnsignedLong((short) (value & 0xFFFF));
 436                 break;
 437             case U32:
 438                 x = Integer.toUnsignedLong(value);
 439                 break;
 440             case S8:
 441                 x = (byte) (value & 0xFF);
 442                 break;
 443             case S16:
 444                 x = (short) (value & 0xFFFF);
 445                 break;
 446             case S32:
 447                 x = value;
 448                 break;
 449             default:
 450                 return state;
 451         }
 452         BigDecimal converted = new BigDecimal(x).movePointLeft(decimals).setScale(decimals, RoundingMode.HALF_EVEN);
 453
 454         if ("String".equalsIgnoreCase(acceptedItemType)) {
 455             state = new StringType(converted.toString());
 456
 457         } else if ("Switch".equalsIgnoreCase(acceptedItemType)) {
 458             state = converted.intValue() == 0 ? OnOffType.OFF : OnOffType.ON;
 459
 460         } else if ("Number".equalsIgnoreCase(acceptedItemType)) {
 461             state = new DecimalType(converted);
 462         }
 463
 464         return state;
 465     }
 466
 467     private void clearCache() {
 468         stateMap.clear();
 469         lastUpdateTime = 0;
 470     }
 471
 472     private void clearCache(int coilAddress) {
 473         stateMap.put(coilAddress, null);
 474     }
 475
 476     private synchronized NibeHeatPumpCommandResult sendMessageToNibe(NibeHeatPumpMessage msg)
 477             throws NibeHeatPumpException {
 478         logger.debug("Sending message: {}", msg);
 479         connector.sendDatagram(msg);
 480         return new NibeHeatPumpCommandResult();
 481     }
 482
 483     @Override
 484     public void msgReceived(NibeHeatPumpMessage msg) {
 485         try {
 486             if (logger.isTraceEnabled()) {
 487                 logger.trace("Received raw data: {}", msg.toHexString());
 488             }
 489
 490             logger.debug("Received message: {}", msg);
 491
 492             updateStatus(ThingStatus.ONLINE);
 493
 494             if (msg instanceof ModbusReadResponseMessage) {
 495                 handleReadResponseMessage((ModbusReadResponseMessage) msg);
 496             } else if (msg instanceof ModbusWriteResponseMessage) {
 497                 handleWriteResponseMessage((ModbusWriteResponseMessage) msg);
 498             } else if (msg instanceof ModbusDataReadOutMessage) {
 499                 handleDataReadOutMessage((ModbusDataReadOutMessage) msg);
 500             } else {
 501                 logger.debug("Received unknown message: {}", msg.toString());
 502             }
 503         } catch (Exception e) {
 504             logger.debug("Error occurred when parsing received message, reason: {}", e.getMessage());
 505         }
 506     }
 507
 508     @Override
 509     public void errorOccurred(String error) {
 510         logger.debug("Error '{}' occurred, re-establish the connection", error);
 511         reconnectionRequest = true;
 512         updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.COMMUNICATION_ERROR, error);
 513     }
 514
 515     private void handleReadResponseMessage(ModbusReadResponseMessage msg) {
 516         if (readResult != null) {
 517             readResult.set(msg);
 518         }
 519     }
 520
 521     private void handleWriteResponseMessage(ModbusWriteResponseMessage msg) {
 522         if (writeResult != null) {
 523             writeResult.set(msg);
 524         }
 525     }
 526
 527     private void handleDataReadOutMessage(ModbusDataReadOutMessage msg) {
 528         boolean parse = true;
 529
 530         logger.debug("Received data read out message");
 531         if (configuration.throttleTime > 0) {
 532             if ((lastUpdateTime + configuration.throttleTime) > System.currentTimeMillis()) {
 533                 logger.debug("Skipping data read out message parsing");
 534                 parse = false;
 535             }
 536         }
 537
 538         if (parse) {
 539             logger.debug("Parsing data read out message");
 540             lastUpdateTime = System.currentTimeMillis();
 541             List<ModbusValue> regValues = msg.getValues();
 542
 543             if (regValues != null) {
 544                 for (ModbusValue val : regValues) {
 545                     handleVariableUpdate(pumpModel, val);
 546                 }
 547             }
 548         }
 549     }
 550
 551     private void handleVariableUpdate(PumpModel pumpModel, ModbusValue value) {
 552         logger.debug("Received variable update: {}", value);
 553         int coilAddress = value.getCoilAddress();
 554
 555         VariableInformation variableInfo = VariableInformation.getVariableInfo(pumpModel, coilAddress);
 556
 557         if (variableInfo != null) {
 558             logger.trace("Using variable information to register {}: {}", coilAddress, variableInfo);
 559
 560             int val = value.getValue();
 561             logger.debug("{} = {}", coilAddress + ":" + variableInfo.variable + "/" + variableInfo.factor, val);
 562
 563             CacheObject oldValue = stateMap.get(coilAddress);
 564
 565             if (oldValue != null && val == oldValue.value
 566                     && (oldValue.lastUpdateTime + refreshIntervalMillis() / 2) >= System.currentTimeMillis()) {
 567                 logger.trace("Value did not change, ignoring update");
 568             } else {
 569                 final String channelPrefix = (variableInfo.type == Type.SETTING ? "setting#" : "sensor#");
 570                 final String channelId = channelPrefix + String.valueOf(coilAddress);
 571                 final String acceptedItemType = thing.getChannel(channelId).getAcceptedItemType();
 572
 573                 logger.trace("AcceptedItemType for channel {} = {}", channelId, acceptedItemType);
 574                 State state = convertNibeValueToState(variableInfo, val, acceptedItemType);
 575                 logger.debug("Setting state {} = {}", coilAddress + ":" + variableInfo.variable, state);
 576                 stateMap.put(coilAddress, new CacheObject(System.currentTimeMillis(), val));
 577                 updateState(new ChannelUID(getThing().getUID(), channelId), state);
 578             }
 579         } else {
 580             logger.debug("Unknown register {}", coilAddress);
 581         }
 582     }
 583
 584     protected class CacheObject {
 585
 586         /** Time when cache object updated in milliseconds */
 587         final long lastUpdateTime;
 588
 589         /** Cache value */
 590         final int value;
 591
 592         /**
 593          * Initialize cache object.
 594          *
 595          * @param lastUpdateTime Time in milliseconds.
 596          * @param value Cache value.
 597          */
 598         CacheObject(long lastUpdateTime, int value) {
 599             this.lastUpdateTime = lastUpdateTime;
 600             this.value = value;
 601         }
 602     }
 603 }