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   1 /**
   2  * Copyright (c) 2010-2023 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.keba.internal.handler;
  14
  15 import static org.openhab.binding.keba.internal.KebaBindingConstants.*;
  16
  17 import java.io.IOException;
  18 import java.math.BigDecimal;
  19 import java.net.InetSocketAddress;
  20 import java.net.Socket;
  21 import java.net.SocketAddress;
  22 import java.nio.ByteBuffer;
  23 import java.util.Map;
  24 import java.util.Map.Entry;
  25 import java.util.concurrent.ScheduledFuture;
  26 import java.util.concurrent.TimeUnit;
  27
  28 import javax.measure.quantity.Dimensionless;
  29 import javax.measure.quantity.ElectricCurrent;
  30 import javax.measure.quantity.ElectricPotential;
  31 import javax.measure.quantity.Energy;
  32 import javax.measure.quantity.Power;
  33 import javax.measure.quantity.Time;
  34
  35 import org.apache.commons.lang3.StringUtils;
  36 import org.openhab.binding.keba.internal.KebaBindingConstants.KebaSeries;
  37 import org.openhab.binding.keba.internal.KebaBindingConstants.KebaType;
  38 import org.openhab.core.cache.ExpiringCacheMap;
  39 import org.openhab.core.config.core.Configuration;
  40 import org.openhab.core.library.types.DecimalType;
  41 import org.openhab.core.library.types.IncreaseDecreaseType;
  42 import org.openhab.core.library.types.OnOffType;
  43 import org.openhab.core.library.types.QuantityType;
  44 import org.openhab.core.library.types.StringType;
  45 import org.openhab.core.library.unit.Units;
  46 import org.openhab.core.thing.ChannelUID;
  47 import org.openhab.core.thing.Thing;
  48 import org.openhab.core.thing.ThingStatus;
  49 import org.openhab.core.thing.ThingStatusDetail;
  50 import org.openhab.core.thing.binding.BaseThingHandler;
  51 import org.openhab.core.types.Command;
  52 import org.openhab.core.types.RefreshType;
  53 import org.openhab.core.types.State;
  54 import org.slf4j.Logger;
  55 import org.slf4j.LoggerFactory;
  56
  57 import com.google.gson.JsonElement;
  58 import com.google.gson.JsonObject;
  59 import com.google.gson.JsonParseException;
  60 import com.google.gson.JsonParser;
  61
  62 /**
  63  * The {@link KeContactHandler} is responsible for handling commands, which
  64  * are sent to one of the channels.
  65  *
  66  * @author Karel Goderis - Initial contribution
  67  */
  68 public class KeContactHandler extends BaseThingHandler {
  69
  70     public static final String IP_ADDRESS = "ipAddress";
  71     public static final String POLLING_REFRESH_INTERVAL = "refreshInterval";
  72     public static final int POLLING_REFRESH_INTERVAL_DEFAULT = 15;
  73     public static final int REPORT_INTERVAL = 3000;
  74     public static final int BUFFER_SIZE = 1024;
  75     public static final int REMOTE_PORT_NUMBER = 7090;
  76     private static final String CACHE_REPORT_1 = "REPORT_1";
  77     private static final String CACHE_REPORT_2 = "REPORT_2";
  78     private static final String CACHE_REPORT_3 = "REPORT_3";
  79     private static final String CACHE_REPORT_100 = "REPORT_100";
  80     public static final int SOCKET_TIME_OUT_MS = 3000;
  81     public static final int SOCKET_CHECK_PORT_NUMBER = 80;
  82
  83     private final Logger logger = LoggerFactory.getLogger(KeContactHandler.class);
  84
  85     private final KeContactTransceiver transceiver;
  86
  87     private ScheduledFuture<?> pollingJob;
  88     private ExpiringCacheMap<String, ByteBuffer> cache;
  89
  90     private int maxPresetCurrent = 0;
  91     private int maxSystemCurrent = 63000;
  92     private KebaType type;
  93     private KebaSeries series;
  94     private int lastState = -1; // trigger a report100 at startup
  95     private boolean isReport100needed = true;
  96
  97     public KeContactHandler(Thing thing, KeContactTransceiver transceiver) {
  98         super(thing);
  99         this.transceiver = transceiver;
 100     }
 101
 102     @Override
 103     public void initialize() {
 104         try {
 105             if (isKebaReachable()) {
 106                 transceiver.registerHandler(this);
 107
 108                 int refreshInterval = getRefreshInterval();
 109                 cache = new ExpiringCacheMap<>(Math.max(refreshInterval - 5, 0) * 1000);
 110
 111                 cache.put(CACHE_REPORT_1, () -> transceiver.send("report 1", getHandler()));
 112                 cache.put(CACHE_REPORT_2, () -> transceiver.send("report 2", getHandler()));
 113                 cache.put(CACHE_REPORT_3, () -> transceiver.send("report 3", getHandler()));
 114                 cache.put(CACHE_REPORT_100, () -> transceiver.send("report 100", getHandler()));
 115
 116                 if (pollingJob == null || pollingJob.isCancelled()) {
 117                     pollingJob = scheduler.scheduleWithFixedDelay(this::pollingRunnable, 0, refreshInterval,
 118                             TimeUnit.SECONDS);
 119                 }
 120             } else {
 121                 updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.CONFIGURATION_ERROR,
 122                         "IP address or port number not set");
 123             }
 124         } catch (IOException e) {
 125             updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.COMMUNICATION_ERROR,
 126                     "Exception during initialization of binding: " + e.toString());
 127         }
 128     }
 129
 130     private boolean isKebaReachable() throws IOException {
 131         boolean isReachable = false;
 132         SocketAddress sockAddr = new InetSocketAddress(getIPAddress(), SOCKET_CHECK_PORT_NUMBER);
 133         Socket socket = new Socket();
 134         try {
 135             socket.connect(sockAddr, SOCKET_TIME_OUT_MS);
 136             isReachable = true;
 137         } finally {
 138             socket.close();
 139         }
 140         logger.debug("isKebaReachable() returns {}", isReachable);
 141         return isReachable;
 142     }
 143
 144     @Override
 145     public void dispose() {
 146         if (pollingJob != null && !pollingJob.isCancelled()) {
 147             pollingJob.cancel(true);
 148             pollingJob = null;
 149         }
 150
 151         transceiver.unRegisterHandler(this);
 152     }
 153
 154     public String getIPAddress() {
 155         return getConfig().get(IP_ADDRESS) != null ? (String) getConfig().get(IP_ADDRESS) : "";
 156     }
 157
 158     public int getRefreshInterval() {
 159         return getConfig().get(POLLING_REFRESH_INTERVAL) != null
 160                 ? ((BigDecimal) getConfig().get(POLLING_REFRESH_INTERVAL)).intValue()
 161                 : POLLING_REFRESH_INTERVAL_DEFAULT;
 162     }
 163
 164     private KeContactHandler getHandler() {
 165         return this;
 166     }
 167
 168     @Override
 169     public void updateStatus(ThingStatus status, ThingStatusDetail statusDetail, String description) {
 170         super.updateStatus(status, statusDetail, description);
 171     }
 172
 173     @Override
 174     protected Configuration getConfig() {
 175         return super.getConfig();
 176     }
 177
 178     private void pollingRunnable() {
 179         try {
 180             logger.debug("Running pollingRunnable to connect Keba wallbox");
 181             long stamp = System.currentTimeMillis();
 182             if (!isKebaReachable()) {
 183                 logger.debug("isKebaReachable() timed out after '{}' milliseconds", System.currentTimeMillis() - stamp);
 184                 updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.COMMUNICATION_ERROR,
 185                         "A timeout occurred while polling the charging station");
 186             } else {
 187                 ByteBuffer response = cache.get(CACHE_REPORT_1);
 188                 if (response == null) {
 189                     logger.debug("Missing response from Keba station for 'report 1'");
 190                 } else {
 191                     onData(response);
 192                 }
 193
 194                 Thread.sleep(REPORT_INTERVAL);
 195
 196                 response = cache.get(CACHE_REPORT_2);
 197                 if (response == null) {
 198                     logger.debug("Missing response from Keba station for 'report 2'");
 199                 } else {
 200                     onData(response);
 201                 }
 202
 203                 Thread.sleep(REPORT_INTERVAL);
 204
 205                 response = cache.get(CACHE_REPORT_3);
 206                 if (response == null) {
 207                     logger.debug("Missing response from Keba station for 'report 3'");
 208                 } else {
 209                     onData(response);
 210                 }
 211
 212                 if (isReport100needed) {
 213                     Thread.sleep(REPORT_INTERVAL);
 214
 215                     response = cache.get(CACHE_REPORT_100);
 216                     if (response == null) {
 217                         logger.debug("Missing response from Keba station for 'report 100'");
 218                     } else {
 219                         onData(response);
 220                     }
 221                     isReport100needed = false;
 222                 }
 223             }
 224         } catch (IOException e) {
 225             logger.debug("An error occurred while polling the KEBA KeContact '{}': {}", getThing().getUID(),
 226                     e.getMessage(), e);
 227             updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.COMMUNICATION_ERROR,
 228                     "An error occurred while polling the charging station");
 229         } catch (InterruptedException e) {
 230             logger.debug("Polling job has been interrupted for handler of thing '{}'.", getThing().getUID());
 231         }
 232     }
 233
 234     protected void onData(ByteBuffer byteBuffer) {
 235         if (getThing().getStatus() != ThingStatus.ONLINE) {
 236             updateStatus(ThingStatus.ONLINE);
 237         }
 238
 239         String response = new String(byteBuffer.array(), 0, byteBuffer.limit());
 240         response = StringUtils.chomp(response);
 241
 242         if (response.contains("TCH-OK")) {
 243             // ignore confirmation messages which are not JSON
 244             return;
 245         }
 246
 247         try {
 248             JsonObject readObject = JsonParser.parseString(response).getAsJsonObject();
 249
 250             for (Entry<String, JsonElement> entry : readObject.entrySet()) {
 251                 switch (entry.getKey()) {
 252                     case "Product": {
 253                         Map<String, String> properties = editProperties();
 254                         String product = entry.getValue().getAsString().trim();
 255                         properties.put(CHANNEL_MODEL, product);
 256                         updateProperties(properties);
 257                         if (product.contains("P20")) {
 258                             type = KebaType.P20;
 259                         } else if (product.contains("P30")) {
 260                             type = KebaType.P30;
 261                         }
 262                         series = KebaSeries.getSeries(product.substring(13, 14).charAt(0));
 263                         break;
 264                     }
 265                     case "Serial": {
 266                         Map<String, String> properties = editProperties();
 267                         properties.put(CHANNEL_SERIAL, entry.getValue().getAsString());
 268                         updateProperties(properties);
 269                         break;
 270                     }
 271                     case "Firmware": {
 272                         Map<String, String> properties = editProperties();
 273                         properties.put(CHANNEL_FIRMWARE, entry.getValue().getAsString());
 274                         updateProperties(properties);
 275                         break;
 276                     }
 277                     case "Plug": {
 278                         int state = entry.getValue().getAsInt();
 279                         switch (state) {
 280                             case 0: {
 281                                 updateState(CHANNEL_WALLBOX, OnOffType.OFF);
 282                                 updateState(CHANNEL_VEHICLE, OnOffType.OFF);
 283                                 updateState(CHANNEL_PLUG_LOCKED, OnOffType.OFF);
 284                                 break;
 285                             }
 286                             case 1: {
 287                                 updateState(CHANNEL_WALLBOX, OnOffType.ON);
 288                                 updateState(CHANNEL_VEHICLE, OnOffType.OFF);
 289                                 updateState(CHANNEL_PLUG_LOCKED, OnOffType.OFF);
 290                                 break;
 291                             }
 292                             case 3: {
 293                                 updateState(CHANNEL_WALLBOX, OnOffType.ON);
 294                                 updateState(CHANNEL_VEHICLE, OnOffType.OFF);
 295                                 updateState(CHANNEL_PLUG_LOCKED, OnOffType.ON);
 296                                 break;
 297                             }
 298                             case 5: {
 299                                 updateState(CHANNEL_WALLBOX, OnOffType.ON);
 300                                 updateState(CHANNEL_VEHICLE, OnOffType.ON);
 301                                 updateState(CHANNEL_PLUG_LOCKED, OnOffType.OFF);
 302                                 break;
 303                             }
 304                             case 7: {
 305                                 updateState(CHANNEL_WALLBOX, OnOffType.ON);
 306                                 updateState(CHANNEL_VEHICLE, OnOffType.ON);
 307                                 updateState(CHANNEL_PLUG_LOCKED, OnOffType.ON);
 308                                 break;
 309                             }
 310                         }
 311                         break;
 312                     }
 313                     case "State": {
 314                         int state = entry.getValue().getAsInt();
 315                         State newState = new DecimalType(state);
 316                         updateState(CHANNEL_STATE, newState);
 317                         if (lastState != state) {
 318                             // the state is different from the last one, so we will trigger a report100
 319                             isReport100needed = true;
 320                             lastState = state;
 321                         }
 322                         break;
 323                     }
 324                     case "Enable sys": {
 325                         int state = entry.getValue().getAsInt();
 326                         switch (state) {
 327                             case 1: {
 328                                 updateState(CHANNEL_ENABLED, OnOffType.ON);
 329                                 break;
 330                             }
 331                             default: {
 332                                 updateState(CHANNEL_ENABLED, OnOffType.OFF);
 333                                 break;
 334                             }
 335                         }
 336                         break;
 337                     }
 338                     case "Curr HW": {
 339                         int state = entry.getValue().getAsInt();
 340                         maxSystemCurrent = state;
 341                         State newState = new QuantityType<ElectricCurrent>(state / 1000.0, Units.AMPERE);
 342                         updateState(CHANNEL_MAX_SYSTEM_CURRENT, newState);
 343                         if (maxSystemCurrent != 0) {
 344                             if (maxSystemCurrent < maxPresetCurrent) {
 345                                 transceiver.send("curr " + String.valueOf(maxSystemCurrent), this);
 346                                 updateState(CHANNEL_MAX_PRESET_CURRENT,
 347                                         new QuantityType<ElectricCurrent>(maxSystemCurrent / 1000.0, Units.AMPERE));
 348                                 updateState(CHANNEL_MAX_PRESET_CURRENT_RANGE, new QuantityType<Dimensionless>(
 349                                         (maxSystemCurrent - 6000) * 100 / (maxSystemCurrent - 6000), Units.PERCENT));
 350                             }
 351                         } else {
 352                             logger.debug("maxSystemCurrent is 0. Ignoring.");
 353                         }
 354                         break;
 355                     }
 356                     case "Curr user": {
 357                         int state = entry.getValue().getAsInt();
 358                         maxPresetCurrent = state;
 359                         State newState = new QuantityType<ElectricCurrent>(state / 1000.0, Units.AMPERE);
 360                         updateState(CHANNEL_MAX_PRESET_CURRENT, newState);
 361                         if (maxSystemCurrent != 0) {
 362                             updateState(CHANNEL_MAX_PRESET_CURRENT_RANGE, new QuantityType<Dimensionless>(
 363                                     Math.min(100, (state - 6000) * 100 / (maxSystemCurrent - 6000)), Units.PERCENT));
 364                         }
 365                         break;
 366                     }
 367                     case "Curr FS": {
 368                         int state = entry.getValue().getAsInt();
 369                         State newState = new QuantityType<ElectricCurrent>(state / 1000.0, Units.AMPERE);
 370                         updateState(CHANNEL_FAILSAFE_CURRENT, newState);
 371                         break;
 372                     }
 373                     case "Max curr": {
 374                         int state = entry.getValue().getAsInt();
 375                         maxPresetCurrent = state;
 376                         State newState = new QuantityType<ElectricCurrent>(state / 1000.0, Units.AMPERE);
 377                         updateState(CHANNEL_PILOT_CURRENT, newState);
 378                         break;
 379                     }
 380                     case "Max curr %": {
 381                         int state = entry.getValue().getAsInt();
 382                         State newState = new QuantityType<Dimensionless>(state / 10.0, Units.PERCENT);
 383                         updateState(CHANNEL_PILOT_PWM, newState);
 384                         break;
 385                     }
 386                     case "Output": {
 387                         int state = entry.getValue().getAsInt();
 388                         switch (state) {
 389                             case 1: {
 390                                 updateState(CHANNEL_OUTPUT, OnOffType.ON);
 391                                 break;
 392                             }
 393                             default: {
 394                                 updateState(CHANNEL_OUTPUT, OnOffType.OFF);
 395                                 break;
 396                             }
 397                         }
 398                         break;
 399                     }
 400                     case "Input": {
 401                         int state = entry.getValue().getAsInt();
 402                         switch (state) {
 403                             case 1: {
 404                                 updateState(CHANNEL_INPUT, OnOffType.ON);
 405                                 break;
 406                             }
 407                             default: {
 408                                 updateState(CHANNEL_INPUT, OnOffType.OFF);
 409                                 break;
 410                             }
 411                         }
 412                         break;
 413                     }
 414                     case "Sec": {
 415                         long state = entry.getValue().getAsLong();
 416                         State newState = new QuantityType<Time>(state, Units.SECOND);
 417                         updateState(CHANNEL_UPTIME, newState);
 418                         break;
 419                     }
 420                     case "U1": {
 421                         int state = entry.getValue().getAsInt();
 422                         State newState = new QuantityType<ElectricPotential>(state, Units.VOLT);
 423                         updateState(CHANNEL_U1, newState);
 424                         break;
 425                     }
 426                     case "U2": {
 427                         int state = entry.getValue().getAsInt();
 428                         State newState = new QuantityType<ElectricPotential>(state, Units.VOLT);
 429                         updateState(CHANNEL_U2, newState);
 430                         break;
 431                     }
 432                     case "U3": {
 433                         int state = entry.getValue().getAsInt();
 434                         State newState = new QuantityType<ElectricPotential>(state, Units.VOLT);
 435                         updateState(CHANNEL_U3, newState);
 436                         break;
 437                     }
 438                     case "I1": {
 439                         int state = entry.getValue().getAsInt();
 440                         State newState = new QuantityType<ElectricCurrent>(state / 1000.0, Units.AMPERE);
 441                         updateState(CHANNEL_I1, newState);
 442                         break;
 443                     }
 444                     case "I2": {
 445                         int state = entry.getValue().getAsInt();
 446                         State newState = new QuantityType<ElectricCurrent>(state / 1000.0, Units.AMPERE);
 447                         updateState(CHANNEL_I2, newState);
 448                         break;
 449                     }
 450                     case "I3": {
 451                         int state = entry.getValue().getAsInt();
 452                         State newState = new QuantityType<ElectricCurrent>(state / 1000.0, Units.AMPERE);
 453                         updateState(CHANNEL_I3, newState);
 454                         break;
 455                     }
 456                     case "P": {
 457                         long state = entry.getValue().getAsLong();
 458                         State newState = new QuantityType<Power>(state / 1000.0, Units.WATT);
 459                         updateState(CHANNEL_POWER, newState);
 460                         break;
 461                     }
 462                     case "PF": {
 463                         int state = entry.getValue().getAsInt();
 464                         State newState = new QuantityType<Dimensionless>(state / 10.0, Units.PERCENT);
 465                         updateState(CHANNEL_POWER_FACTOR, newState);
 466                         break;
 467                     }
 468                     case "E pres": {
 469                         long state = entry.getValue().getAsLong();
 470                         State newState = new QuantityType<Energy>(state / 10.0, Units.WATT_HOUR);
 471                         updateState(CHANNEL_SESSION_CONSUMPTION, newState);
 472                         break;
 473                     }
 474                     case "E total": {
 475                         long state = entry.getValue().getAsLong();
 476                         State newState = new QuantityType<Energy>(state / 10.0, Units.WATT_HOUR);
 477                         updateState(CHANNEL_TOTAL_CONSUMPTION, newState);
 478                         break;
 479                     }
 480                     case "AuthON": {
 481                         int state = entry.getValue().getAsInt();
 482                         State newState = new DecimalType(state);
 483                         updateState(CHANNEL_AUTHON, newState);
 484                         break;
 485                     }
 486                     case "Authreq": {
 487                         int state = entry.getValue().getAsInt();
 488                         State newState = new DecimalType(state);
 489                         updateState(CHANNEL_AUTHREQ, newState);
 490                         break;
 491                     }
 492                     case "RFID tag": {
 493                         String state = entry.getValue().getAsString().trim();
 494                         State newState = new StringType(state);
 495                         updateState(CHANNEL_SESSION_RFID_TAG, newState);
 496                         break;
 497                     }
 498                     case "RFID class": {
 499                         String state = entry.getValue().getAsString().trim();
 500                         State newState = new StringType(state);
 501                         updateState(CHANNEL_SESSION_RFID_CLASS, newState);
 502                         break;
 503                     }
 504                     case "Session ID": {
 505                         int state = entry.getValue().getAsInt();
 506                         State newState = new DecimalType(state);
 507                         updateState(CHANNEL_SESSION_SESSION_ID, newState);
 508                         break;
 509                     }
 510                     case "Setenergy": {
 511                         int state = entry.getValue().getAsInt();
 512                         State newState = new QuantityType<Energy>(state / 10.0, Units.WATT_HOUR);
 513                         updateState(CHANNEL_SETENERGY, newState);
 514                         break;
 515                     }
 516                 }
 517             }
 518         } catch (JsonParseException e) {
 519             logger.debug("Invalid JSON data will be ignored: '{}'", response);
 520         }
 521     }
 522
 523     @Override
 524     public void handleCommand(ChannelUID channelUID, Command command) {
 525         if ((command instanceof RefreshType)) {
 526             // let's assume we do frequent enough polling and ignore the REFRESH request here
 527             // in order to prevent too many channel state updates
 528         } else {
 529             switch (channelUID.getId()) {
 530                 case CHANNEL_MAX_PRESET_CURRENT: {
 531                     if (command instanceof QuantityType<?>) {
 532                         QuantityType<?> value = ((QuantityType<?>) command).toUnit("mA");
 533
 534                         transceiver.send(
 535                                 "curr " + String.valueOf(Math.min(Math.max(6000, value.intValue()), maxSystemCurrent)),
 536                                 this);
 537                     }
 538                     break;
 539                 }
 540                 case CHANNEL_MAX_PRESET_CURRENT_RANGE: {
 541                     if (command instanceof OnOffType || command instanceof IncreaseDecreaseType
 542                             || command instanceof QuantityType<?>) {
 543                         long newValue = 6000;
 544                         if (command == IncreaseDecreaseType.INCREASE) {
 545                             newValue = Math.min(Math.max(6000, maxPresetCurrent + 1), maxSystemCurrent);
 546                         } else if (command == IncreaseDecreaseType.DECREASE) {
 547                             newValue = Math.min(Math.max(6000, maxPresetCurrent - 1), maxSystemCurrent);
 548                         } else if (command == OnOffType.ON) {
 549                             newValue = maxSystemCurrent;
 550                         } else if (command == OnOffType.OFF) {
 551                             newValue = 6000;
 552                         } else if (command instanceof QuantityType<?>) {
 553                             QuantityType<?> value = ((QuantityType<?>) command).toUnit("%");
 554                             newValue = Math.round(6000 + (maxSystemCurrent - 6000) * value.doubleValue() / 100.0);
 555                         } else {
 556                             return;
 557                         }
 558                         transceiver.send("curr " + String.valueOf(newValue), this);
 559                     }
 560                     break;
 561                 }
 562                 case CHANNEL_ENABLED: {
 563                     if (command instanceof OnOffType) {
 564                         if (command == OnOffType.ON) {
 565                             transceiver.send("ena 1", this);
 566                         } else if (command == OnOffType.OFF) {
 567                             transceiver.send("ena 0", this);
 568                         } else {
 569                             return;
 570                         }
 571                     }
 572                     break;
 573                 }
 574                 case CHANNEL_OUTPUT: {
 575                     if (command instanceof OnOffType) {
 576                         if (command == OnOffType.ON) {
 577                             transceiver.send("output 1", this);
 578                         } else if (command == OnOffType.OFF) {
 579                             transceiver.send("output 0", this);
 580                         } else {
 581                             return;
 582                         }
 583                     }
 584                     break;
 585                 }
 586                 case CHANNEL_DISPLAY: {
 587                     if (command instanceof StringType) {
 588                         if (type == KebaType.P30 && (series == KebaSeries.C || series == KebaSeries.X)) {
 589                             String cmd = command.toString();
 590                             int maxLength = (cmd.length() < 23) ? cmd.length() : 23;
 591                             transceiver.send("display 0 0 0 0 " + cmd.substring(0, maxLength), this);
 592                         } else {
 593                             logger.warn("'Display' is not supported on a KEBA KeContact {}:{}", type, series);
 594                         }
 595                     }
 596                     break;
 597                 }
 598                 case CHANNEL_SETENERGY: {
 599                     if (command instanceof QuantityType<?>) {
 600                         QuantityType<?> value = ((QuantityType<?>) command).toUnit(Units.WATT_HOUR);
 601                         transceiver.send(
 602                                 "setenergy " + String.valueOf(
 603                                         Math.min(Math.max(0, Math.round(value.doubleValue() * 10.0)), 999999999)),
 604                                 this);
 605                     }
 606                     break;
 607                 }
 608                 case CHANNEL_AUTHENTICATE: {
 609                     if (command instanceof StringType) {
 610                         String cmd = command.toString();
 611                         // cmd must contain ID + CLASS (works only if the RFID TAG is in the whitelist of the Keba
 612                         // station)
 613                         transceiver.send("start " + cmd, this);
 614                     }
 615                     break;
 616                 }
 617             }
 618         }
 619     }
 620 }