Lwm2m: RPC composite read

@@ -27,5 +27,6 @@ public class OtherConfiguration {
     private PowerMode powerMode;
     private PowerMode powerMode;
     private String fwUpdateResource;
     private String fwUpdateResource;
     private String swUpdateResource;
     private String swUpdateResource;
+    private boolean composite;
 
 
 }
 }

+/**
+ * Copyright © 2016-2021 The Thingsboard Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.thingsboard.server.transport.lwm2m.config;
+
+import lombok.Getter;
+import org.eclipse.leshan.core.LwM2m.Version;
+import org.eclipse.leshan.core.request.ContentFormat;
+
+public enum LwM2mVersion {
+    VERSION_1_0(0, Version.V1_0, ContentFormat.TLV),
+    VERSION_1_1(1, Version.V1_1, ContentFormat.TEXT);
+
+    @Getter
+    private final int code;
+    @Getter
+    private final Version version;
+    @Getter
+    private final ContentFormat contentFormat;
+
+    LwM2mVersion(int code, Version version, ContentFormat contentFormat) {
+        this.code = code;
+        this.version = version;
+        this.contentFormat = contentFormat;
+    }
+
+    public static LwM2mVersion fromType(Version version) {
+        for (LwM2mVersion to : LwM2mVersion.values()) {
+            if (to.version.equals(version)) {
+                return to;
+            }
+        }
+        throw new IllegalArgumentException(String.format("Unsupported typeLwM2mVersion type : %d", version));
+    }
+
+    public static ContentFormat fromContentFormat(String versionStr) {
+        for (LwM2mVersion to : LwM2mVersion.values()) {
+            if (to.version.toString().equals(versionStr)) {
+                return to.contentFormat;
+            }
+        }
+        throw new IllegalArgumentException(String.format("Unsupported contentFormatLwM2mVersion version : %d", versionStr));
+    }
+
+    public static LwM2mVersion fromCode(int code) {
+        for (LwM2mVersion to : LwM2mVersion.values()) {
+            if (to.code == code) {
+                return to;
+            }
+        }
+        throw new IllegalArgumentException(String.format("Unsupported codeLwM2mVersion code : %d", code));
+    }
+}
+

@@ -22,37 +22,37 @@ import lombok.Getter;
  */
  */
 public enum LwM2mOperationType {
 public enum LwM2mOperationType {
 
 
-    READ(0, "Read", true),
-    READ_COMPOSITE(1, "ReadComposite", true),
-    DISCOVER(2, "Discover", true),
-    DISCOVER_ALL(3, "DiscoverAll", false),
-    OBSERVE_READ_ALL(4, "ObserveReadAll", false),
+    READ(0, "Read", 1),
+    READ_COMPOSITE(1, "ReadComposite", 2),
+    DISCOVER(2, "Discover", 1),
+    DISCOVER_ALL(3, "DiscoverAll", 0),
+    OBSERVE_READ_ALL(4, "ObserveReadAll", 0),
 
 
-    OBSERVE(5, "Observe", true),
-    OBSERVE_COMPOSITE(6, "ObserveComposite", true),
-    OBSERVE_CANCEL(7, "ObserveCancel", true),
-    OBSERVE_COMPOSITE_CANCEL(8, "ObserveCompositeCancel", true),
-    OBSERVE_CANCEL_ALL(9, "ObserveCancelAll", false),
-    EXECUTE(10, "Execute", true),
+    OBSERVE(5, "Observe", 1),
+    OBSERVE_COMPOSITE(6, "ObserveComposite", 2),
+    OBSERVE_CANCEL(7, "ObserveCancel", 1),
+    OBSERVE_COMPOSITE_CANCEL(8, "ObserveCompositeCancel", 2),
+    OBSERVE_CANCEL_ALL(9, "ObserveCancelAll", 0),
+    EXECUTE(10, "Execute", 1),
     /**
     /**
      * Replaces the Object Instance or the Resource(s) with the new value provided in the “Write” operation. (see
      * Replaces the Object Instance or the Resource(s) with the new value provided in the “Write” operation. (see
      * section 5.3.3 of the LW M2M spec).
      * section 5.3.3 of the LW M2M spec).
      * if all resources are to be replaced
      * if all resources are to be replaced
      */
      */
-    WRITE_REPLACE(11, "WriteReplace", true),
+    WRITE_REPLACE(11, "WriteReplace", 1),
 
 
     /**
     /**
      * Adds or updates Resources provided in the new value and leaves other existing Resources unchanged. (see section
      * Adds or updates Resources provided in the new value and leaves other existing Resources unchanged. (see section
      * 5.3.3 of the LW M2M spec).
      * 5.3.3 of the LW M2M spec).
      * if this is a partial update request
      * if this is a partial update request
      */
      */
-    WRITE_UPDATE(12, "WriteUpdate", true),
-    WRITE_COMPOSITE(14, "WriteComposite", true),
-    WRITE_ATTRIBUTES(15, "WriteAttributes", true),
-    DELETE(16, "Delete", true),
+    WRITE_UPDATE(12, "WriteUpdate", 1),
+    WRITE_COMPOSITE(14, "WriteComposite", 2),
+    WRITE_ATTRIBUTES(15, "WriteAttributes", 1),
+    DELETE(16, "Delete", 1),
 
 
     // only for RPC
     // only for RPC
-    FW_UPDATE(17, "FirmwareUpdate", false);
+    FW_UPDATE(17, "FirmwareUpdate", 0);
 
 
 //        FW_READ_INFO(18, "FirmwareReadInfo"),
 //        FW_READ_INFO(18, "FirmwareReadInfo"),
 //        SW_READ_INFO(19, "SoftwareReadInfo"),
 //        SW_READ_INFO(19, "SoftwareReadInfo"),
@@ -64,12 +64,12 @@ public enum LwM2mOperationType {
     @Getter
     @Getter
     private final String type;
     private final String type;
     @Getter
     @Getter
-    private final boolean hasObjectId;
+    private final int hasObjectIdOrComposite;
 
 
-    LwM2mOperationType(int code, String type, boolean hasObjectId) {
+    LwM2mOperationType(int code, String type, int hasObjectIdOrComposite) {
         this.code = code;
         this.code = code;
         this.type = type;
         this.type = type;
-        this.hasObjectId = hasObjectId;
+        this.hasObjectIdOrComposite = hasObjectIdOrComposite;
     }
     }
 
 
     public static LwM2mOperationType fromType(String type) {
     public static LwM2mOperationType fromType(String type) {

@@ -44,6 +44,7 @@ import org.thingsboard.server.common.data.device.data.lwm2m.BootstrapConfigurati
 import org.thingsboard.server.common.data.device.profile.DeviceProfileTransportConfiguration;
 import org.thingsboard.server.common.data.device.profile.DeviceProfileTransportConfiguration;
 import org.thingsboard.server.common.data.device.profile.Lwm2mDeviceProfileTransportConfiguration;
 import org.thingsboard.server.common.data.device.profile.Lwm2mDeviceProfileTransportConfiguration;
 import org.thingsboard.server.common.transport.TransportServiceCallback;
 import org.thingsboard.server.common.transport.TransportServiceCallback;
+import org.thingsboard.server.transport.lwm2m.config.LwM2mVersion;
 import org.thingsboard.server.transport.lwm2m.server.client.LwM2mClient;
 import org.thingsboard.server.transport.lwm2m.server.client.LwM2mClient;
 import org.thingsboard.server.transport.lwm2m.server.client.ResourceValue;
 import org.thingsboard.server.transport.lwm2m.server.client.ResourceValue;
 import org.thingsboard.server.transport.lwm2m.server.ota.firmware.FirmwareUpdateResult;
 import org.thingsboard.server.transport.lwm2m.server.ota.firmware.FirmwareUpdateResult;
@@ -85,7 +86,7 @@ import static org.thingsboard.server.transport.lwm2m.server.ota.DefaultLwM2MOtaU
 @Slf4j
 @Slf4j
 public class LwM2mTransportUtil {
 public class LwM2mTransportUtil {
 
 
-    public static final String LWM2M_VERSION_DEFAULT = "1.0";
+    public static final String LWM2M_OBJECT_VERSION_DEFAULT = "1.0";
 
 
     public static final String LOG_LWM2M_TELEMETRY = "logLwm2m";
     public static final String LOG_LWM2M_TELEMETRY = "logLwm2m";
     public static final String LOG_LWM2M_INFO = "info";
     public static final String LOG_LWM2M_INFO = "info";
@@ -303,7 +304,7 @@ public class LwM2mTransportUtil {
 
 
     public static String convertObjectIdToVersionedId(String path, Registration registration) {
     public static String convertObjectIdToVersionedId(String path, Registration registration) {
         String ver = registration.getSupportedObject().get(new LwM2mPath(path).getObjectId());
         String ver = registration.getSupportedObject().get(new LwM2mPath(path).getObjectId());
-        ver = ver != null ? ver : LWM2M_VERSION_DEFAULT;
+        ver = ver != null ? ver : LwM2mVersion.VERSION_1_0.getVersion().toString();
         try {
         try {
             String[] keyArray = path.split(LWM2M_SEPARATOR_PATH);
             String[] keyArray = path.split(LWM2M_SEPARATOR_PATH);
             if (keyArray.length > 1) {
             if (keyArray.length > 1) {

@@ -38,6 +38,7 @@ import org.thingsboard.server.common.data.id.TenantId;
 import org.thingsboard.server.common.transport.auth.ValidateDeviceCredentialsResponse;
 import org.thingsboard.server.common.transport.auth.ValidateDeviceCredentialsResponse;
 import org.thingsboard.server.gen.transport.TransportProtos.SessionInfoProto;
 import org.thingsboard.server.gen.transport.TransportProtos.SessionInfoProto;
 import org.thingsboard.server.gen.transport.TransportProtos.TsKvProto;
 import org.thingsboard.server.gen.transport.TransportProtos.TsKvProto;
+import org.thingsboard.server.transport.lwm2m.config.LwM2mVersion;
 import org.thingsboard.server.transport.lwm2m.server.LwM2mQueuedRequest;
 import org.thingsboard.server.transport.lwm2m.server.LwM2mQueuedRequest;
 
 
 import java.util.Collection;
 import java.util.Collection;
@@ -53,7 +54,7 @@ import java.util.concurrent.locks.ReentrantLock;
 import java.util.stream.Collectors;
 import java.util.stream.Collectors;
 
 
 import static org.thingsboard.server.common.data.lwm2m.LwM2mConstants.LWM2M_SEPARATOR_PATH;
 import static org.thingsboard.server.common.data.lwm2m.LwM2mConstants.LWM2M_SEPARATOR_PATH;
-import static org.thingsboard.server.transport.lwm2m.server.LwM2mTransportUtil.LWM2M_VERSION_DEFAULT;
+import static org.thingsboard.server.transport.lwm2m.server.LwM2mTransportUtil.LWM2M_OBJECT_VERSION_DEFAULT;
 import static org.thingsboard.server.transport.lwm2m.server.LwM2mTransportUtil.convertObjectIdToVersionedId;
 import static org.thingsboard.server.transport.lwm2m.server.LwM2mTransportUtil.convertObjectIdToVersionedId;
 import static org.thingsboard.server.transport.lwm2m.server.LwM2mTransportUtil.equalsResourceTypeGetSimpleName;
 import static org.thingsboard.server.transport.lwm2m.server.LwM2mTransportUtil.equalsResourceTypeGetSimpleName;
 import static org.thingsboard.server.transport.lwm2m.server.LwM2mTransportUtil.fromVersionedIdToObjectId;
 import static org.thingsboard.server.transport.lwm2m.server.LwM2mTransportUtil.fromVersionedIdToObjectId;
@@ -243,11 +244,11 @@ public class LwM2mClient implements Cloneable {
                 .getObjectModel(pathIds.getObjectId()) : null;
                 .getObjectModel(pathIds.getObjectId()) : null;
     }
     }
 
 
-    public String objectToString(LwM2mObject lwM2mObject, LwM2mValueConverter converter, String pathIdVer) {
+    public String objectToString(LwM2mObject lwM2mObject) {
         StringBuilder builder = new StringBuilder();
         StringBuilder builder = new StringBuilder();
         builder.append("LwM2mObject [id=").append(lwM2mObject.getId()).append(", instances={");
         builder.append("LwM2mObject [id=").append(lwM2mObject.getId()).append(", instances={");
         lwM2mObject.getInstances().forEach((instId, inst) -> {
         lwM2mObject.getInstances().forEach((instId, inst) -> {
-            builder.append(instId).append("=").append(this.instanceToString(inst, converter, pathIdVer)).append(", ");
+            builder.append(instId).append("=").append(this.instanceToString(inst)).append(", ");
         });
         });
         int startInd = builder.lastIndexOf(", ");
         int startInd = builder.lastIndexOf(", ");
         if (startInd > 0) {
         if (startInd > 0) {
@@ -257,11 +258,11 @@ public class LwM2mClient implements Cloneable {
         return builder.toString();
         return builder.toString();
     }
     }
 
 
-    public String instanceToString(LwM2mObjectInstance objectInstance, LwM2mValueConverter converter, String pathIdVer) {
+    public String instanceToString(LwM2mObjectInstance objectInstance) {
         StringBuilder builder = new StringBuilder();
         StringBuilder builder = new StringBuilder();
         builder.append("LwM2mObjectInstance [id=").append(objectInstance.getId()).append(", resources={");
         builder.append("LwM2mObjectInstance [id=").append(objectInstance.getId()).append(", resources={");
         objectInstance.getResources().forEach((resId, res) -> {
         objectInstance.getResources().forEach((resId, res) -> {
-            builder.append(resId).append("=").append(this.resourceToString(res, converter, pathIdVer)).append(", ");
+            builder.append(resId).append("=").append(this.resourceToString(res)).append(", ");
         });
         });
         int startInd = builder.lastIndexOf(", ");
         int startInd = builder.lastIndexOf(", ");
         if (startInd > 0) {
         if (startInd > 0) {
@@ -271,8 +272,9 @@ public class LwM2mClient implements Cloneable {
         return builder.toString();
         return builder.toString();
     }
     }
 
 
-    public String resourceToString(LwM2mResource lwM2mResource, LwM2mValueConverter converter, String pathIdVer) {
-        return lwM2mResource.getValue().toString();
+    public String resourceToString(LwM2mResource lwM2mResource) {
+
+        return lwM2mResource.isMultiInstances() ? lwM2mResource.getInstances().toString() : lwM2mResource.getValue().toString();
     }
     }
 
 
     public Collection<LwM2mResource> getNewResourceForInstance(String pathRezIdVer, Object params, LwM2mModelProvider modelProvider,
     public Collection<LwM2mResource> getNewResourceForInstance(String pathRezIdVer, Object params, LwM2mModelProvider modelProvider,
@@ -308,11 +310,14 @@ public class LwM2mClient implements Cloneable {
         return resources;
         return resources;
     }
     }
 
 
-    public boolean isValidObjectVersion(String path) {
+    public void isValidObjectVersion(String path) {
         LwM2mPath pathIds = new LwM2mPath(fromVersionedIdToObjectId(path));
         LwM2mPath pathIds = new LwM2mPath(fromVersionedIdToObjectId(path));
         String verSupportedObject = registration.getSupportedObject().get(pathIds.getObjectId());
         String verSupportedObject = registration.getSupportedObject().get(pathIds.getObjectId());
         String verRez = getVerFromPathIdVerOrId(path);
         String verRez = getVerFromPathIdVerOrId(path);
-        return verRez == null ? LWM2M_VERSION_DEFAULT.equals(verSupportedObject) : verRez.equals(verSupportedObject);
+        if ((verRez != null && !verRez.equals(verSupportedObject)) ||
+                (verRez == null && !LWM2M_OBJECT_VERSION_DEFAULT.equals(verSupportedObject))) {
+            throw new IllegalArgumentException(String.format("Specified resource id %s is not valid version! Must be version: %s", path, verSupportedObject));
+        }
     }
     }
 
 
     /**
     /**
@@ -357,10 +362,8 @@ public class LwM2mClient implements Cloneable {
     public ContentFormat getDefaultContentFormat() {
     public ContentFormat getDefaultContentFormat() {
         if (registration == null) {
         if (registration == null) {
             return ContentFormat.DEFAULT;
             return ContentFormat.DEFAULT;
-        } else if (registration.getLwM2mVersion().equals("1.0")) {
-            return ContentFormat.TLV;
         } else {
         } else {
-            return ContentFormat.TEXT;
+            return LwM2mVersion.fromContentFormat(registration.getLwM2mVersion());
         }
         }
     }
     }
 
 

@@ -57,6 +57,8 @@ import org.thingsboard.server.transport.lwm2m.config.LwM2MTransportServerConfig;
 import org.thingsboard.server.transport.lwm2m.server.LwM2mTransportContext;
 import org.thingsboard.server.transport.lwm2m.server.LwM2mTransportContext;
 import org.thingsboard.server.transport.lwm2m.server.client.LwM2mClient;
 import org.thingsboard.server.transport.lwm2m.server.client.LwM2mClient;
 import org.thingsboard.server.transport.lwm2m.server.common.LwM2MExecutorAwareService;
 import org.thingsboard.server.transport.lwm2m.server.common.LwM2MExecutorAwareService;
+import org.thingsboard.server.transport.lwm2m.server.downlink.composite.TbLwM2MReadCompositeRequest;
+import org.thingsboard.server.transport.lwm2m.server.downlink.composite.TbLwM2MWriteResponseCompositeCallback;
 import org.thingsboard.server.transport.lwm2m.server.log.LwM2MTelemetryLogService;
 import org.thingsboard.server.transport.lwm2m.server.log.LwM2MTelemetryLogService;
 import org.thingsboard.server.transport.lwm2m.server.uplink.DefaultLwM2MUplinkMsgHandler;
 import org.thingsboard.server.transport.lwm2m.server.uplink.DefaultLwM2MUplinkMsgHandler;
 import org.thingsboard.server.transport.lwm2m.utils.LwM2mValueConverterImpl;
 import org.thingsboard.server.transport.lwm2m.utils.LwM2mValueConverterImpl;
@@ -79,6 +81,7 @@ import static org.eclipse.leshan.core.attributes.Attribute.LESSER_THAN;
 import static org.eclipse.leshan.core.attributes.Attribute.MAXIMUM_PERIOD;
 import static org.eclipse.leshan.core.attributes.Attribute.MAXIMUM_PERIOD;
 import static org.eclipse.leshan.core.attributes.Attribute.MINIMUM_PERIOD;
 import static org.eclipse.leshan.core.attributes.Attribute.MINIMUM_PERIOD;
 import static org.eclipse.leshan.core.attributes.Attribute.STEP;
 import static org.eclipse.leshan.core.attributes.Attribute.STEP;
+import static org.thingsboard.server.transport.lwm2m.server.LwM2mTransportUtil.fromVersionedIdToObjectId;
 
 
 @Slf4j
 @Slf4j
 @Service
 @Service
@@ -121,27 +124,26 @@ public class DefaultLwM2mDownlinkMsgHandler extends LwM2MExecutorAwareService im
     }
     }
 
 
     @Override
     @Override
-//    public void sendReadCompositeRequest(LwM2mClient client, TbLwM2MReadCompositeRequest request, DownlinkRequestCallback<ReadCompositeRequest, ReadCompositeResponse> callback) {
-    public void sendReadCompositeRequest(LwM2mClient client, String [] paths, DefaultLwM2MUplinkMsgHandler lwM2MUplinkMsgHandler) {
-//        validateVersionedId(client, request);
-        DownlinkRequestCallback<ReadCompositeRequest, ReadCompositeResponse> callback = new TbLwM2MReadCompositeCallback(lwM2MUplinkMsgHandler, logService, client, null);
+    public void sendReadCompositeRequest(LwM2mClient client, TbLwM2MReadCompositeRequest request, DownlinkRequestCallback<ReadCompositeRequest, ReadCompositeResponse> callback) {
+        validateVersionedIds(client, request);
         ContentFormat requestContentFormat = ContentFormat.SENML_JSON;
         ContentFormat requestContentFormat = ContentFormat.SENML_JSON;
         ContentFormat responseContentFormat = ContentFormat.SENML_JSON;
         ContentFormat responseContentFormat = ContentFormat.SENML_JSON;
-        ReadCompositeRequest downlink = new ReadCompositeRequest(requestContentFormat, responseContentFormat, paths);
+
+        ReadCompositeRequest downlink = new ReadCompositeRequest(requestContentFormat, responseContentFormat, request.getObjectIds());
         sendReadRequestComposite(client, downlink, this.config.getTimeout(), callback);
         sendReadRequestComposite(client, downlink, this.config.getTimeout(), callback);
     }
     }
 
 
     @Override
     @Override
     public void sendWriteCompositeRequest(LwM2mClient client, Map<String, Object> nodes, DefaultLwM2MUplinkMsgHandler handler) {
     public void sendWriteCompositeRequest(LwM2mClient client, Map<String, Object> nodes, DefaultLwM2MUplinkMsgHandler handler) {
 //        ResourceModel resourceModelWrite = client.getResourceModel(request.getVersionedId(), this.config.getModelProvider());
 //        ResourceModel resourceModelWrite = client.getResourceModel(request.getVersionedId(), this.config.getModelProvider());
-        TbLwM2MWriteResponseCompositeCallback callback = new TbLwM2MWriteResponseCompositeCallback (handler, logService, client, null);
-            ContentFormat contentFormat = ContentFormat.SENML_JSON;
-            try {
-                WriteCompositeRequest downlink = new WriteCompositeRequest(contentFormat, nodes);
-                sendWriteCompositeRequest(client, downlink, this.config.getTimeout(), callback);
-            } catch (Exception e) {
-                callback.onError(JacksonUtil.toString(nodes), e);
-            }
+        TbLwM2MWriteResponseCompositeCallback callback = new TbLwM2MWriteResponseCompositeCallback(handler, logService, client, null);
+        ContentFormat contentFormat = ContentFormat.SENML_JSON;
+        try {
+            WriteCompositeRequest downlink = new WriteCompositeRequest(contentFormat, nodes);
+            sendWriteCompositeRequest(client, downlink, this.config.getTimeout(), callback);
+        } catch (Exception e) {
+            callback.onError(JacksonUtil.toString(nodes), e);
+        }
 
 
     }
     }
 
 
@@ -277,7 +279,7 @@ public class DefaultLwM2mDownlinkMsgHandler extends LwM2MExecutorAwareService im
              */
              */
             Collection<LwM2mResource> resources = client.getNewResourcesForInstance(request.getVersionedId(), request.getValue(), this.config.getModelProvider(), this.converter);
             Collection<LwM2mResource> resources = client.getNewResourcesForInstance(request.getVersionedId(), request.getValue(), this.config.getModelProvider(), this.converter);
             if (resources.size() > 0) {
             if (resources.size() > 0) {
-                ContentFormat contentFormat = request.getObjectContentFormat() != null ? request.getObjectContentFormat() : client.getDefaultContentFormat();
+                ContentFormat contentFormat = request.getObjectContentFormat() != null ? request.getObjectContentFormat() : ContentFormat.DEFAULT;
                 WriteRequest downlink = new WriteRequest(WriteRequest.Mode.UPDATE, contentFormat, resultIds.getObjectId(), resultIds.getObjectInstanceId(), resources);
                 WriteRequest downlink = new WriteRequest(WriteRequest.Mode.UPDATE, contentFormat, resultIds.getObjectId(), resultIds.getObjectInstanceId(), resources);
                 sendRequest(client, downlink, request.getTimeout(), callback);
                 sendRequest(client, downlink, request.getTimeout(), callback);
             } else {
             } else {
@@ -407,14 +409,23 @@ public class DefaultLwM2mDownlinkMsgHandler extends LwM2MExecutorAwareService im
     }
     }
 
 
     private void validateVersionedId(LwM2mClient client, HasVersionedId request) {
     private void validateVersionedId(LwM2mClient client, HasVersionedId request) {
-        if (!client.isValidObjectVersion(request.getVersionedId())) {
-            throw new IllegalArgumentException("Specified resource id is not configured in the device profile!");
-        }
+        client.isValidObjectVersion(request.getVersionedId());
         if (request.getObjectId() == null) {
         if (request.getObjectId() == null) {
             throw new IllegalArgumentException("Specified object id is null!");
             throw new IllegalArgumentException("Specified object id is null!");
         }
         }
     }
     }
 
 
+    private void validateVersionedIds(LwM2mClient client, HasVersionedIds request) {
+        for (String versionedId : request.getVersionedIds()) {
+            client.isValidObjectVersion(versionedId);
+        }
+        for (String objectId : request.getObjectIds()) {
+            if (objectId == null) {
+                throw new IllegalArgumentException("Specified object id is null!");
+            }
+        }
+    }
+
     private static <T> void addAttribute(List<Attribute> attributes, String attributeName, T value) {
     private static <T> void addAttribute(List<Attribute> attributes, String attributeName, T value) {
         addAttribute(attributes, attributeName, value, null, null);
         addAttribute(attributes, attributeName, value, null, null);
     }
     }
@@ -447,6 +458,15 @@ public class DefaultLwM2mDownlinkMsgHandler extends LwM2MExecutorAwareService im
     }
     }
 
 
     private static ContentFormat getRequestContentFormat(LwM2mClient client, HasContentFormat request) {
     private static ContentFormat getRequestContentFormat(LwM2mClient client, HasContentFormat request) {
-        return request.getRequestContentFormat() != null ? request.getRequestContentFormat() : client.getDefaultContentFormat();
+        if (request.getRequestContentFormat() != null) {
+            return request.getRequestContentFormat();
+        } else {
+            String versionedId = fromVersionedIdToObjectId(((TbLwM2MReadRequest) request).getVersionedId());
+            if (versionedId != null && (new LwM2mPath(versionedId).isObject() || new LwM2mPath(versionedId).isObjectInstance())) {
+                return ContentFormat.DEFAULT;
+            } else {
+                return client.getDefaultContentFormat();
+            }
+        }
     }
     }
 }
 }

+/**
+ * Copyright © 2016-2021 The Thingsboard Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.thingsboard.server.transport.lwm2m.server.downlink;
+
+import org.thingsboard.server.transport.lwm2m.server.LwM2mTransportUtil;
+
+import java.util.Set;
+import java.util.concurrent.ConcurrentHashMap;
+
+public interface HasVersionedIds {
+
+    String[] getVersionedIds();
+
+    default String[] getObjectIds() {
+        Set objectIds = ConcurrentHashMap.newKeySet();
+        for (String versionedId : getVersionedIds()) {
+            objectIds.add(LwM2mTransportUtil.fromVersionedIdToObjectId(versionedId));
+        }
+        return (String[]) objectIds.toArray(String[]::new);
+    }
+
+}

@@ -20,6 +20,7 @@ import org.eclipse.leshan.core.request.DeleteRequest;
 import org.eclipse.leshan.core.request.DiscoverRequest;
 import org.eclipse.leshan.core.request.DiscoverRequest;
 import org.eclipse.leshan.core.request.ExecuteRequest;
 import org.eclipse.leshan.core.request.ExecuteRequest;
 import org.eclipse.leshan.core.request.ObserveRequest;
 import org.eclipse.leshan.core.request.ObserveRequest;
+import org.eclipse.leshan.core.request.ReadCompositeRequest;
 import org.eclipse.leshan.core.request.ReadRequest;
 import org.eclipse.leshan.core.request.ReadRequest;
 import org.eclipse.leshan.core.request.WriteAttributesRequest;
 import org.eclipse.leshan.core.request.WriteAttributesRequest;
 import org.eclipse.leshan.core.request.WriteRequest;
 import org.eclipse.leshan.core.request.WriteRequest;
@@ -27,10 +28,12 @@ import org.eclipse.leshan.core.response.DeleteResponse;
 import org.eclipse.leshan.core.response.DiscoverResponse;
 import org.eclipse.leshan.core.response.DiscoverResponse;
 import org.eclipse.leshan.core.response.ExecuteResponse;
 import org.eclipse.leshan.core.response.ExecuteResponse;
 import org.eclipse.leshan.core.response.ObserveResponse;
 import org.eclipse.leshan.core.response.ObserveResponse;
+import org.eclipse.leshan.core.response.ReadCompositeResponse;
 import org.eclipse.leshan.core.response.ReadResponse;
 import org.eclipse.leshan.core.response.ReadResponse;
 import org.eclipse.leshan.core.response.WriteAttributesResponse;
 import org.eclipse.leshan.core.response.WriteAttributesResponse;
 import org.eclipse.leshan.core.response.WriteResponse;
 import org.eclipse.leshan.core.response.WriteResponse;
 import org.thingsboard.server.transport.lwm2m.server.client.LwM2mClient;
 import org.thingsboard.server.transport.lwm2m.server.client.LwM2mClient;
+import org.thingsboard.server.transport.lwm2m.server.downlink.composite.TbLwM2MReadCompositeRequest;
 import org.thingsboard.server.transport.lwm2m.server.uplink.DefaultLwM2MUplinkMsgHandler;
 import org.thingsboard.server.transport.lwm2m.server.uplink.DefaultLwM2MUplinkMsgHandler;
 
 
 import java.util.List;
 import java.util.List;
@@ -41,8 +44,7 @@ public interface LwM2mDownlinkMsgHandler {
 
 
     void sendReadRequest(LwM2mClient client, TbLwM2MReadRequest request, DownlinkRequestCallback<ReadRequest, ReadResponse> callback);
     void sendReadRequest(LwM2mClient client, TbLwM2MReadRequest request, DownlinkRequestCallback<ReadRequest, ReadResponse> callback);
 
 
-//    void sendReadCompositeRequest(LwM2mClient client, TbLwM2MReadCompositeRequest request, DownlinkRequestCallback<ReadCompositeRequest, ReadCompositeResponse> callback);
-    void sendReadCompositeRequest(LwM2mClient client, String [] paths, DefaultLwM2MUplinkMsgHandler lwM2MUplinkMsgHandler);
+    void sendReadCompositeRequest(LwM2mClient client, TbLwM2MReadCompositeRequest request, DownlinkRequestCallback<ReadCompositeRequest, ReadCompositeResponse> callback);
 
 
     void sendObserveRequest(LwM2mClient client, TbLwM2MObserveRequest request, DownlinkRequestCallback<ObserveRequest, ObserveResponse> callback);
     void sendObserveRequest(LwM2mClient client, TbLwM2MObserveRequest request, DownlinkRequestCallback<ObserveRequest, ObserveResponse> callback);
 
 

@@ -25,15 +25,18 @@ import static org.thingsboard.server.transport.lwm2m.server.LwM2mTransportUtil.L
 public abstract class TbLwM2MTargetedCallback<R, T> extends AbstractTbLwM2MRequestCallback<R, T> {
 public abstract class TbLwM2MTargetedCallback<R, T> extends AbstractTbLwM2MRequestCallback<R, T> {
 
 
     protected final String versionedId;
     protected final String versionedId;
+    protected final String[] versionedIds;
 
 
     public TbLwM2MTargetedCallback(LwM2MTelemetryLogService logService, LwM2mClient client, String versionedId) {
     public TbLwM2MTargetedCallback(LwM2MTelemetryLogService logService, LwM2mClient client, String versionedId) {
         super(logService, client);
         super(logService, client);
         this.versionedId = versionedId;
         this.versionedId = versionedId;
+        this.versionedIds = null;
     }
     }
 
 
-    public TbLwM2MTargetedCallback(LwM2MTelemetryLogService logService, LwM2mClient client) {
+    public TbLwM2MTargetedCallback(LwM2MTelemetryLogService logService, LwM2mClient client, String[] versionedIds) {
         super(logService, client);
         super(logService, client);
         this.versionedId = null;
         this.versionedId = null;
+        this.versionedIds = versionedIds;
     }
     }
 
 
     @Override
     @Override

@@ -20,8 +20,6 @@ import org.thingsboard.server.transport.lwm2m.server.client.LwM2mClient;
 import org.thingsboard.server.transport.lwm2m.server.log.LwM2MTelemetryLogService;
 import org.thingsboard.server.transport.lwm2m.server.log.LwM2MTelemetryLogService;
 import org.thingsboard.server.transport.lwm2m.server.uplink.LwM2mUplinkMsgHandler;
 import org.thingsboard.server.transport.lwm2m.server.uplink.LwM2mUplinkMsgHandler;
 
 
-import static org.thingsboard.server.transport.lwm2m.server.LwM2mTransportUtil.LOG_LWM2M_INFO;
-
 @Slf4j
 @Slf4j
 public abstract class TbLwM2MUplinkTargetedCallback<R, T> extends TbLwM2MTargetedCallback<R, T> {
 public abstract class TbLwM2MUplinkTargetedCallback<R, T> extends TbLwM2MTargetedCallback<R, T> {
 
 
@@ -32,4 +30,9 @@ public abstract class TbLwM2MUplinkTargetedCallback<R, T> extends TbLwM2MTargete
         this.handler = handler;
         this.handler = handler;
     }
     }
 
 
+    public TbLwM2MUplinkTargetedCallback(LwM2mUplinkMsgHandler handler, LwM2MTelemetryLogService logService, LwM2mClient client, String[] versionedIds) {
+        super(logService, client, versionedIds);
+        this.handler = handler;
+    }
+
 }
 }

+/**
+ * Copyright © 2016-2021 The Thingsboard Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.thingsboard.server.transport.lwm2m.server.downlink.composite;
+
+import lombok.Getter;
+import org.thingsboard.server.transport.lwm2m.server.downlink.HasVersionedIds;
+import org.thingsboard.server.transport.lwm2m.server.downlink.TbLwM2MDownlinkRequest;
+
+public abstract class AbstractTbLwM2MTargetedDownlinkCompositeRequest<T> implements TbLwM2MDownlinkRequest<T>, HasVersionedIds {
+
+    @Getter
+    private final String [] versionedIds;
+    @Getter
+    private final long timeout;
+
+    public AbstractTbLwM2MTargetedDownlinkCompositeRequest(String [] versionedIds, long timeout) {
+        this.versionedIds = versionedIds;
+        this.timeout = timeout;
+    }
+
+}

@@ -13,26 +13,27 @@
  * See the License for the specific language governing permissions and
  * See the License for the specific language governing permissions and
  * limitations under the License.
  * limitations under the License.
  */
  */
-package org.thingsboard.server.transport.lwm2m.server.downlink;
+package org.thingsboard.server.transport.lwm2m.server.downlink.composite;
 
 
 import lombok.extern.slf4j.Slf4j;
 import lombok.extern.slf4j.Slf4j;
 import org.eclipse.leshan.core.request.ReadCompositeRequest;
 import org.eclipse.leshan.core.request.ReadCompositeRequest;
 import org.eclipse.leshan.core.response.ReadCompositeResponse;
 import org.eclipse.leshan.core.response.ReadCompositeResponse;
 import org.thingsboard.server.transport.lwm2m.server.client.LwM2mClient;
 import org.thingsboard.server.transport.lwm2m.server.client.LwM2mClient;
+import org.thingsboard.server.transport.lwm2m.server.downlink.TbLwM2MUplinkTargetedCallback;
 import org.thingsboard.server.transport.lwm2m.server.log.LwM2MTelemetryLogService;
 import org.thingsboard.server.transport.lwm2m.server.log.LwM2MTelemetryLogService;
 import org.thingsboard.server.transport.lwm2m.server.uplink.LwM2mUplinkMsgHandler;
 import org.thingsboard.server.transport.lwm2m.server.uplink.LwM2mUplinkMsgHandler;
 
 
 @Slf4j
 @Slf4j
 public class TbLwM2MReadCompositeCallback extends TbLwM2MUplinkTargetedCallback<ReadCompositeRequest, ReadCompositeResponse> {
 public class TbLwM2MReadCompositeCallback extends TbLwM2MUplinkTargetedCallback<ReadCompositeRequest, ReadCompositeResponse> {
 
 
-    public TbLwM2MReadCompositeCallback(LwM2mUplinkMsgHandler handler, LwM2MTelemetryLogService logService, LwM2mClient client, String targetId) {
-        super(handler, logService, client, targetId);
+    public TbLwM2MReadCompositeCallback(LwM2mUplinkMsgHandler handler, LwM2MTelemetryLogService logService, LwM2mClient client, String[] versionedIds) {
+        super(handler, logService, client, versionedIds);
     }
     }
 
 
     @Override
     @Override
     public void onSuccess(ReadCompositeRequest request, ReadCompositeResponse response) {
     public void onSuccess(ReadCompositeRequest request, ReadCompositeResponse response) {
         super.onSuccess(request, response);
         super.onSuccess(request, response);
-        handler.onUpdateValueAfterReadCompositeResponse(client.getRegistration(), versionedId, response);
+        handler.onUpdateValueAfterReadCompositeResponse(client.getRegistration(), response);
     }
     }
 
 
 }
 }

@@ -13,15 +13,16 @@
  * See the License for the specific language governing permissions and
  * See the License for the specific language governing permissions and
  * limitations under the License.
  * limitations under the License.
  */
  */
-package org.thingsboard.server.transport.lwm2m.server.downlink;
+package org.thingsboard.server.transport.lwm2m.server.downlink.composite;
 
 
 import lombok.Builder;
 import lombok.Builder;
 import lombok.Getter;
 import lombok.Getter;
 import org.eclipse.leshan.core.request.ContentFormat;
 import org.eclipse.leshan.core.request.ContentFormat;
 import org.eclipse.leshan.core.response.ReadCompositeResponse;
 import org.eclipse.leshan.core.response.ReadCompositeResponse;
 import org.thingsboard.server.transport.lwm2m.server.LwM2mOperationType;
 import org.thingsboard.server.transport.lwm2m.server.LwM2mOperationType;
+import org.thingsboard.server.transport.lwm2m.server.downlink.HasContentFormat;
 
 
-public class TbLwM2MReadCompositeRequest extends AbstractTbLwM2MTargetedDownlinkRequest<ReadCompositeResponse> implements HasContentFormat {
+public class TbLwM2MReadCompositeRequest extends AbstractTbLwM2MTargetedDownlinkCompositeRequest<ReadCompositeResponse> implements HasContentFormat {
 
 
     @Getter
     @Getter
     private final ContentFormat requestContentFormat;
     private final ContentFormat requestContentFormat;
@@ -30,8 +31,8 @@ public class TbLwM2MReadCompositeRequest extends AbstractTbLwM2MTargetedDownlink
     private final ContentFormat responseContentFormat;
     private final ContentFormat responseContentFormat;
 
 
     @Builder
     @Builder
-    private TbLwM2MReadCompositeRequest(String versionedId, long timeout, ContentFormat requestContentFormat, ContentFormat responseContentFormat) {
-        super(versionedId, timeout);
+    private TbLwM2MReadCompositeRequest(String [] versionedIds, long timeout, ContentFormat requestContentFormat, ContentFormat responseContentFormat) {
+        super(versionedIds, timeout);
         this.requestContentFormat = requestContentFormat;
         this.requestContentFormat = requestContentFormat;
         this.responseContentFormat = responseContentFormat;
         this.responseContentFormat = responseContentFormat;
     }
     }
@@ -40,5 +41,4 @@ public class TbLwM2MReadCompositeRequest extends AbstractTbLwM2MTargetedDownlink
     public LwM2mOperationType getType() {
     public LwM2mOperationType getType() {
         return LwM2mOperationType.READ_COMPOSITE;
         return LwM2mOperationType.READ_COMPOSITE;
     }
     }
-
 }
 }

@@ -13,13 +13,14 @@
  * See the License for the specific language governing permissions and
  * See the License for the specific language governing permissions and
  * limitations under the License.
  * limitations under the License.
  */
  */
-package org.thingsboard.server.transport.lwm2m.server.downlink;
+package org.thingsboard.server.transport.lwm2m.server.downlink.composite;
 
 
 import lombok.Builder;
 import lombok.Builder;
 import lombok.Getter;
 import lombok.Getter;
 import org.eclipse.leshan.core.request.ContentFormat;
 import org.eclipse.leshan.core.request.ContentFormat;
 import org.eclipse.leshan.core.response.WriteCompositeResponse;
 import org.eclipse.leshan.core.response.WriteCompositeResponse;
 import org.thingsboard.server.transport.lwm2m.server.LwM2mOperationType;
 import org.thingsboard.server.transport.lwm2m.server.LwM2mOperationType;
+import org.thingsboard.server.transport.lwm2m.server.downlink.AbstractTbLwM2MTargetedDownlinkRequest;
 
 
 public class TbLwM2MWriteCompositeRequest extends AbstractTbLwM2MTargetedDownlinkRequest<WriteCompositeResponse> {
 public class TbLwM2MWriteCompositeRequest extends AbstractTbLwM2MTargetedDownlinkRequest<WriteCompositeResponse> {
 
 

@@ -13,11 +13,12 @@
  * See the License for the specific language governing permissions and
  * See the License for the specific language governing permissions and
  * limitations under the License.
  * limitations under the License.
  */
  */
-package org.thingsboard.server.transport.lwm2m.server.downlink;
+package org.thingsboard.server.transport.lwm2m.server.downlink.composite;
 
 
 import org.eclipse.leshan.core.request.WriteCompositeRequest;
 import org.eclipse.leshan.core.request.WriteCompositeRequest;
 import org.eclipse.leshan.core.response.WriteCompositeResponse;
 import org.eclipse.leshan.core.response.WriteCompositeResponse;
 import org.thingsboard.server.transport.lwm2m.server.client.LwM2mClient;
 import org.thingsboard.server.transport.lwm2m.server.client.LwM2mClient;
+import org.thingsboard.server.transport.lwm2m.server.downlink.TbLwM2MUplinkTargetedCallback;
 import org.thingsboard.server.transport.lwm2m.server.log.LwM2MTelemetryLogService;
 import org.thingsboard.server.transport.lwm2m.server.log.LwM2MTelemetryLogService;
 import org.thingsboard.server.transport.lwm2m.server.uplink.LwM2mUplinkMsgHandler;
 import org.thingsboard.server.transport.lwm2m.server.uplink.LwM2mUplinkMsgHandler;
 
 

@@ -50,7 +50,12 @@ import org.thingsboard.server.transport.lwm2m.server.downlink.TbLwM2MWriteAttrib
 import org.thingsboard.server.transport.lwm2m.server.downlink.TbLwM2MWriteReplaceRequest;
 import org.thingsboard.server.transport.lwm2m.server.downlink.TbLwM2MWriteReplaceRequest;
 import org.thingsboard.server.transport.lwm2m.server.downlink.TbLwM2MWriteResponseCallback;
 import org.thingsboard.server.transport.lwm2m.server.downlink.TbLwM2MWriteResponseCallback;
 import org.thingsboard.server.transport.lwm2m.server.downlink.TbLwM2MWriteUpdateRequest;
 import org.thingsboard.server.transport.lwm2m.server.downlink.TbLwM2MWriteUpdateRequest;
+import org.thingsboard.server.transport.lwm2m.server.downlink.composite.TbLwM2MReadCompositeCallback;
+import org.thingsboard.server.transport.lwm2m.server.downlink.composite.TbLwM2MReadCompositeRequest;
 import org.thingsboard.server.transport.lwm2m.server.log.LwM2MTelemetryLogService;
 import org.thingsboard.server.transport.lwm2m.server.log.LwM2MTelemetryLogService;
+import org.thingsboard.server.transport.lwm2m.server.rpc.composite.RpcReadCompositeRequest;
+import org.thingsboard.server.transport.lwm2m.server.rpc.composite.RpcReadResponseCompositeCallback;
+import org.thingsboard.server.transport.lwm2m.server.rpc.composite.RpcWriteCompositeRequest;
 import org.thingsboard.server.transport.lwm2m.server.uplink.LwM2mUplinkMsgHandler;
 import org.thingsboard.server.transport.lwm2m.server.uplink.LwM2mUplinkMsgHandler;
 
 
 import java.util.Map;
 import java.util.Map;
@@ -92,7 +97,7 @@ public class DefaultLwM2MRpcRequestHandler implements LwM2MRpcRequestHandler {
                 return;
                 return;
             }
             }
             try {
             try {
-                if (operationType.isHasObjectId()) {
+                if (operationType.getHasObjectIdOrComposite() == 1) {
                     String objectId = getIdFromParameters(client, rpcRequst);
                     String objectId = getIdFromParameters(client, rpcRequst);
                     switch (operationType) {
                     switch (operationType) {
                         case READ:
                         case READ:
@@ -125,6 +130,17 @@ public class DefaultLwM2MRpcRequestHandler implements LwM2MRpcRequestHandler {
                         default:
                         default:
                             throw new IllegalArgumentException("Unsupported operation: " + operationType.name());
                             throw new IllegalArgumentException("Unsupported operation: " + operationType.name());
                     }
                     }
+                } else if (operationType.getHasObjectIdOrComposite() == 2) {
+                    switch (operationType) {
+                        case READ_COMPOSITE:
+                            sendReadCompositeRequest(client, rpcRequst);
+                            break;
+                        case WRITE_COMPOSITE:
+                            sendWriteCompositeRequest(client, rpcRequst);
+                            break;
+                        default:
+                            throw new IllegalArgumentException("Unsupported operation: " + operationType.name());
+                    }
                 } else {
                 } else {
                     switch (operationType) {
                     switch (operationType) {
                         case OBSERVE_CANCEL_ALL:
                         case OBSERVE_CANCEL_ALL:
@@ -151,14 +167,22 @@ public class DefaultLwM2MRpcRequestHandler implements LwM2MRpcRequestHandler {
     private void sendReadRequest(LwM2mClient client, TransportProtos.ToDeviceRpcRequestMsg requestMsg, String versionedId) {
     private void sendReadRequest(LwM2mClient client, TransportProtos.ToDeviceRpcRequestMsg requestMsg, String versionedId) {
         TbLwM2MReadRequest request = TbLwM2MReadRequest.builder().versionedId(versionedId).timeout(this.config.getTimeout()).build();
         TbLwM2MReadRequest request = TbLwM2MReadRequest.builder().versionedId(versionedId).timeout(this.config.getTimeout()).build();
         var mainCallback = new TbLwM2MReadCallback(uplinkHandler, logService, client, versionedId);
         var mainCallback = new TbLwM2MReadCallback(uplinkHandler, logService, client, versionedId);
-        var rpcCallback = new RpcReadResponseCallback<>(transportService, client, requestMsg, versionedId, mainCallback);
+        var rpcCallback = new RpcReadResponseCallback<>(transportService, client, requestMsg, mainCallback);
         downlinkHandler.sendReadRequest(client, request, rpcCallback);
         downlinkHandler.sendReadRequest(client, request, rpcCallback);
     }
     }
 
 
+    private void sendReadCompositeRequest(LwM2mClient client, TransportProtos.ToDeviceRpcRequestMsg requestMsg) {
+        String[] versionedIds = getIdsFromParameters(client, requestMsg);
+        TbLwM2MReadCompositeRequest request = TbLwM2MReadCompositeRequest.builder().versionedIds(versionedIds).timeout(this.config.getTimeout()).build();
+        var mainCallback = new TbLwM2MReadCompositeCallback(uplinkHandler, logService, client, versionedIds);
+        var rpcCallback = new RpcReadResponseCompositeCallback(transportService, client, requestMsg, mainCallback);
+        downlinkHandler.sendReadCompositeRequest(client, request, rpcCallback);
+    }
+
     private void sendObserveRequest(LwM2mClient client, TransportProtos.ToDeviceRpcRequestMsg requestMsg, String versionedId) {
     private void sendObserveRequest(LwM2mClient client, TransportProtos.ToDeviceRpcRequestMsg requestMsg, String versionedId) {
         TbLwM2MObserveRequest request = TbLwM2MObserveRequest.builder().versionedId(versionedId).timeout(this.config.getTimeout()).build();
         TbLwM2MObserveRequest request = TbLwM2MObserveRequest.builder().versionedId(versionedId).timeout(this.config.getTimeout()).build();
         var mainCallback = new TbLwM2MObserveCallback(uplinkHandler, logService, client, versionedId);
         var mainCallback = new TbLwM2MObserveCallback(uplinkHandler, logService, client, versionedId);
-        var rpcCallback = new RpcReadResponseCallback<>(transportService, client, requestMsg, versionedId, mainCallback);
+        var rpcCallback = new RpcReadResponseCallback<>(transportService, client, requestMsg, mainCallback);
         downlinkHandler.sendObserveRequest(client, request, rpcCallback);
         downlinkHandler.sendObserveRequest(client, request, rpcCallback);
     }
     }
 
 
@@ -215,6 +239,16 @@ public class DefaultLwM2MRpcRequestHandler implements LwM2MRpcRequestHandler {
         downlinkHandler.sendWriteReplaceRequest(client, request, rpcCallback);
         downlinkHandler.sendWriteReplaceRequest(client, request, rpcCallback);
     }
     }
 
 
+    private void sendWriteCompositeRequest(LwM2mClient client, TransportProtos.ToDeviceRpcRequestMsg requestMsg) {
+        RpcWriteCompositeRequest nodes = JacksonUtil.fromString(requestMsg.getParams(), RpcWriteCompositeRequest.class);
+//        TbLwM2MWriteReplaceRequest request = TbLwM2MWriteReplaceRequest.builder().versionedId(versionedId)
+//                .value(requestBody.getValue())
+//                .timeout(this.config.getTimeout()).build();
+//        var mainCallback = new TbLwM2MWriteResponseCallback(uplinkHandler, logService, client, versionedId);
+//        var rpcCallback = new RpcEmptyResponseCallback<>(transportService, client, requestMsg, mainCallback);
+//        downlinkHandler.sendWriteReplaceRequest(client, request, rpcCallback);
+    }
+
     private void sendCancelObserveRequest(LwM2mClient client, TransportProtos.ToDeviceRpcRequestMsg requestMsg, String versionedId) {
     private void sendCancelObserveRequest(LwM2mClient client, TransportProtos.ToDeviceRpcRequestMsg requestMsg, String versionedId) {
         TbLwM2MCancelObserveRequest downlink = TbLwM2MCancelObserveRequest.builder().versionedId(versionedId).timeout(this.config.getTimeout()).build();
         TbLwM2MCancelObserveRequest downlink = TbLwM2MCancelObserveRequest.builder().versionedId(versionedId).timeout(this.config.getTimeout()).build();
         var mainCallback = new TbLwM2MCancelObserveCallback(logService, client, versionedId);
         var mainCallback = new TbLwM2MCancelObserveCallback(logService, client, versionedId);
@@ -249,6 +283,24 @@ public class DefaultLwM2MRpcRequestHandler implements LwM2MRpcRequestHandler {
         return targetId;
         return targetId;
     }
     }
 
 
+    private String[] getIdsFromParameters(LwM2mClient client, TransportProtos.ToDeviceRpcRequestMsg rpcRequst) {
+        RpcReadCompositeRequest requestParams = JacksonUtil.fromString(rpcRequst.getParams(), RpcReadCompositeRequest.class);
+        if (requestParams.getKeys() != null && requestParams.getKeys().length > 0) {
+            Set targetIds = ConcurrentHashMap.newKeySet();
+            for (String key : requestParams.getKeys()) {
+                String targetId = clientContext.getObjectIdByKeyNameFromProfile(client, key);
+                if (targetId != null) {
+                    targetIds.add(targetId);
+                }
+            }
+            return (String[]) targetIds.toArray(String[]::new);
+        } else if (requestParams.getIds() != null && requestParams.getIds().length > 0) {
+            return requestParams.getIds();
+        } else {
+            throw new IllegalArgumentException("Can't find 'key' or 'id' in the requestParams parameters!");
+        }
+    }
+
     private void sendErrorRpcResponse(TransportProtos.SessionInfoProto sessionInfo, int requestId, String result, String error) {
     private void sendErrorRpcResponse(TransportProtos.SessionInfoProto sessionInfo, int requestId, String result, String error) {
         String payload = JacksonUtil.toString(JacksonUtil.newObjectNode().put("result", result).put("error", error));
         String payload = JacksonUtil.toString(JacksonUtil.newObjectNode().put("result", result).put("error", error));
         TransportProtos.ToDeviceRpcResponseMsg msg = TransportProtos.ToDeviceRpcResponseMsg.newBuilder().setRequestId(requestId).setPayload(payload).build();
         TransportProtos.ToDeviceRpcResponseMsg msg = TransportProtos.ToDeviceRpcResponseMsg.newBuilder().setRequestId(requestId).setPayload(payload).build();

@@ -24,5 +24,4 @@ public class IdOrKeyRequest {
 
 
     private String key;
     private String key;
     private String id;
     private String id;
-
 }
 }

@@ -16,13 +16,11 @@
 package org.thingsboard.server.transport.lwm2m.server.rpc;
 package org.thingsboard.server.transport.lwm2m.server.rpc;
 
 
 import org.eclipse.leshan.core.ResponseCode;
 import org.eclipse.leshan.core.ResponseCode;
-import org.eclipse.leshan.core.node.codec.LwM2mValueConverter;
 import org.thingsboard.common.util.JacksonUtil;
 import org.thingsboard.common.util.JacksonUtil;
 import org.thingsboard.server.common.transport.TransportService;
 import org.thingsboard.server.common.transport.TransportService;
 import org.thingsboard.server.gen.transport.TransportProtos;
 import org.thingsboard.server.gen.transport.TransportProtos;
 import org.thingsboard.server.transport.lwm2m.server.client.LwM2mClient;
 import org.thingsboard.server.transport.lwm2m.server.client.LwM2mClient;
 import org.thingsboard.server.transport.lwm2m.server.downlink.DownlinkRequestCallback;
 import org.thingsboard.server.transport.lwm2m.server.downlink.DownlinkRequestCallback;
-import org.thingsboard.server.transport.lwm2m.utils.LwM2mValueConverterImpl;
 
 
 public abstract class RpcDownlinkRequestCallbackProxy<R, T> implements DownlinkRequestCallback<R, T> {
 public abstract class RpcDownlinkRequestCallbackProxy<R, T> implements DownlinkRequestCallback<R, T> {
 
 
@@ -31,14 +29,12 @@ public abstract class RpcDownlinkRequestCallbackProxy<R, T> implements DownlinkR
     private final DownlinkRequestCallback<R, T> callback;
     private final DownlinkRequestCallback<R, T> callback;
 
 
     protected final LwM2mClient client;
     protected final LwM2mClient client;
-    protected final LwM2mValueConverter converter;
 
 
     public RpcDownlinkRequestCallbackProxy(TransportService transportService, LwM2mClient client, TransportProtos.ToDeviceRpcRequestMsg requestMsg, DownlinkRequestCallback<R, T> callback) {
     public RpcDownlinkRequestCallbackProxy(TransportService transportService, LwM2mClient client, TransportProtos.ToDeviceRpcRequestMsg requestMsg, DownlinkRequestCallback<R, T> callback) {
         this.transportService = transportService;
         this.transportService = transportService;
         this.client = client;
         this.client = client;
         this.request = requestMsg;
         this.request = requestMsg;
         this.callback = callback;
         this.callback = callback;
-        this.converter = LwM2mValueConverterImpl.getInstance();
     }
     }
 
 
     @Override
     @Override

@@ -29,22 +29,19 @@ import java.util.Optional;
 
 
 public class RpcReadResponseCallback<R extends LwM2mRequest<T>, T extends ReadResponse> extends RpcLwM2MDownlinkCallback<R, T> {
 public class RpcReadResponseCallback<R extends LwM2mRequest<T>, T extends ReadResponse> extends RpcLwM2MDownlinkCallback<R, T> {
 
 
-    private final String versionedId;
-
-    public RpcReadResponseCallback(TransportService transportService, LwM2mClient client, TransportProtos.ToDeviceRpcRequestMsg requestMsg, String versionedId, DownlinkRequestCallback<R, T> callback) {
+    public RpcReadResponseCallback(TransportService transportService, LwM2mClient client, TransportProtos.ToDeviceRpcRequestMsg requestMsg, DownlinkRequestCallback<R, T> callback) {
         super(transportService, client, requestMsg, callback);
         super(transportService, client, requestMsg, callback);
-        this.versionedId = versionedId;
     }
     }
 
 
     @Override
     @Override
     protected Optional<String> serializeSuccessfulResponse(T response) {
     protected Optional<String> serializeSuccessfulResponse(T response) {
         Object value = null;
         Object value = null;
         if (response.getContent() instanceof LwM2mObject) {
         if (response.getContent() instanceof LwM2mObject) {
-            value = client.objectToString((LwM2mObject) response.getContent(), this.converter, versionedId);
+            value = client.objectToString((LwM2mObject) response.getContent());
         } else if (response.getContent() instanceof LwM2mObjectInstance) {
         } else if (response.getContent() instanceof LwM2mObjectInstance) {
-            value = client.instanceToString((LwM2mObjectInstance) response.getContent(), this.converter, versionedId);
+            value = client.instanceToString((LwM2mObjectInstance) response.getContent());
         } else if (response.getContent() instanceof LwM2mResource) {
         } else if (response.getContent() instanceof LwM2mResource) {
-            value = client.resourceToString((LwM2mResource) response.getContent(), this.converter, versionedId);
+            value = client.resourceToString((LwM2mResource) response.getContent());
         }
         }
         return Optional.of(String.format("%s", value));
         return Optional.of(String.format("%s", value));
     }
     }

+/**
+ * Copyright © 2016-2021 The Thingsboard Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.thingsboard.server.transport.lwm2m.server.rpc.composite;
+
+import org.eclipse.leshan.core.request.ReadCompositeRequest;
+import org.eclipse.leshan.core.response.ReadCompositeResponse;
+import org.thingsboard.server.common.data.StringUtils;
+import org.thingsboard.server.common.transport.TransportService;
+import org.thingsboard.server.gen.transport.TransportProtos;
+import org.thingsboard.server.transport.lwm2m.server.client.LwM2mClient;
+import org.thingsboard.server.transport.lwm2m.server.downlink.DownlinkRequestCallback;
+import org.thingsboard.server.transport.lwm2m.server.rpc.LwM2MRpcResponseBody;
+import org.thingsboard.server.transport.lwm2m.server.rpc.RpcDownlinkRequestCallbackProxy;
+
+import java.util.Optional;
+
+public abstract class RpcLwM2MDownlinkCompositeCallback<R extends ReadCompositeRequest, T extends ReadCompositeResponse> extends RpcDownlinkRequestCallbackProxy<R, T> {
+
+    public RpcLwM2MDownlinkCompositeCallback(TransportService transportService, LwM2mClient client, TransportProtos.ToDeviceRpcRequestMsg requestMsg, DownlinkRequestCallback<R, T> callback) {
+        super(transportService, client, requestMsg, callback);
+    }
+
+    @Override
+    protected void sendRpcReplyOnSuccess(T response) {
+        LwM2MRpcResponseBody.LwM2MRpcResponseBodyBuilder builder = LwM2MRpcResponseBody.builder().result(response.getCode().getName());
+        if (response.isSuccess()) {
+            Optional<String> responseValue = serializeSuccessfulResponse(response);
+            if (responseValue.isPresent() && StringUtils.isNotEmpty(responseValue.get())) {
+                builder.value(responseValue.get());
+            }
+        } else {
+            if (StringUtils.isNotEmpty(response.getErrorMessage())) {
+                builder.error(response.getErrorMessage());
+            }
+        }
+        reply(builder.build());
+    }
+
+    protected abstract Optional<String> serializeSuccessfulResponse(T response);
+}

@@ -13,15 +13,16 @@
  * See the License for the specific language governing permissions and
  * See the License for the specific language governing permissions and
  * limitations under the License.
  * limitations under the License.
  */
  */
-package org.thingsboard.server.transport.lwm2m.client;
+package org.thingsboard.server.transport.lwm2m.server.rpc.composite;
 
 
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
 import lombok.Data;
 import lombok.Data;
 
 
-import java.util.UUID;
-
 @Data
 @Data
-public class LwM2mSoftwareUpdate {
-    private volatile String clientSwVersion;
-    private volatile String currentSwVersion;
-    private volatile UUID currentSwId;
-}
+@JsonIgnoreProperties(ignoreUnknown = true)
+public class RpcReadCompositeRequest {
+
+    private String [] keys;
+    private String [] ids;
+
+}

+/**
+ * Copyright © 2016-2021 The Thingsboard Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.thingsboard.server.transport.lwm2m.server.rpc.composite;
+
+import org.eclipse.leshan.core.request.ReadCompositeRequest;
+import org.eclipse.leshan.core.response.ReadCompositeResponse;
+import org.thingsboard.server.common.transport.TransportService;
+import org.thingsboard.server.gen.transport.TransportProtos;
+import org.thingsboard.server.transport.lwm2m.server.client.LwM2mClient;
+import org.thingsboard.server.transport.lwm2m.server.downlink.DownlinkRequestCallback;
+
+import java.util.Optional;
+
+public class RpcReadResponseCompositeCallback<R extends ReadCompositeRequest, T extends ReadCompositeResponse> extends RpcLwM2MDownlinkCompositeCallback<R, T> {
+
+    public RpcReadResponseCompositeCallback(TransportService transportService, LwM2mClient client, TransportProtos.ToDeviceRpcRequestMsg requestMsg, DownlinkRequestCallback<R, T> callback) {
+        super(transportService, client, requestMsg, callback);
+    }
+
+    @Override
+    protected Optional<String> serializeSuccessfulResponse(T response) {
+        return Optional.of(String.format("%s", response.getContent().toString()));
+    }
+}

+/**
+ * Copyright © 2016-2021 The Thingsboard Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.thingsboard.server.transport.lwm2m.server.rpc.composite;
+
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
+import lombok.Data;
+
+import java.util.Map;
+
+@Data
+@JsonIgnoreProperties(ignoreUnknown = true)
+public class RpcWriteCompositeRequest {
+
+    private Map<String, Object> nodes;
+
+}

@@ -350,17 +350,19 @@ public class DefaultLwM2MUplinkMsgHandler extends LwM2MExecutorAwareService impl
         }
         }
     }
     }
 
 
-    public void onUpdateValueAfterReadCompositeResponse(Registration registration, String path, ReadCompositeResponse response) {
+    public void onUpdateValueAfterReadCompositeResponse(Registration registration, ReadCompositeResponse response) {
         log.warn("201) ReadCompositeResponse: [{}]", response);
         log.warn("201) ReadCompositeResponse: [{}]", response);
         if (response.getContent() != null) {
         if (response.getContent() != null) {
             LwM2mClient lwM2MClient = clientContext.getClientByEndpoint(registration.getEndpoint());
             LwM2mClient lwM2MClient = clientContext.getClientByEndpoint(registration.getEndpoint());
             response.getContent().forEach((k, v) -> {
             response.getContent().forEach((k, v) -> {
-                if (v instanceof LwM2mObject) {
-                    this.updateObjectResourceValue(lwM2MClient, (LwM2mObject) v, k.toString());
-                } else if (v instanceof LwM2mObjectInstance) {
-                    this.updateObjectInstanceResourceValue(lwM2MClient, (LwM2mObjectInstance) v, k.toString());
-                } else if (v instanceof LwM2mResource) {
-                    this.updateResourcesValue(lwM2MClient, (LwM2mResource) v, k.toString());
+                if (v != null) {
+                    if (v instanceof LwM2mObject) {
+                        this.updateObjectResourceValue(lwM2MClient, (LwM2mObject) v, k.toString());
+                    } else if (v instanceof LwM2mObjectInstance) {
+                        this.updateObjectInstanceResourceValue(lwM2MClient, (LwM2mObjectInstance) v, k.toString());
+                    } else if (v instanceof LwM2mResource) {
+                        this.updateResourcesValue(lwM2MClient, (LwM2mResource) v, k.toString());
+                    }
                 }
                 }
             });
             });
         }
         }
@@ -474,12 +476,12 @@ public class DefaultLwM2MUplinkMsgHandler extends LwM2MExecutorAwareService impl
 //        String [] paths = new String[] {"/5"};
 //        String [] paths = new String[] {"/5"};
 //            String [] paths = new String[] {"/"};
 //            String [] paths = new String[] {"/"};
 //        String [] paths = new String[] {"/9"};
 //        String [] paths = new String[] {"/9"};
-            defaultLwM2MDownlinkMsgHandler.sendReadCompositeRequest(lwM2MClient, paths, this);
+//            defaultLwM2MDownlinkMsgHandler.sendReadCompositeRequest(lwM2MClient, paths, this);
             Map<String, Object> nodes = new HashMap<>();
             Map<String, Object> nodes = new HashMap<>();
             nodes.put("/3/0/14", "+02");
             nodes.put("/3/0/14", "+02");
             nodes.put("/1/0/2", 100);
             nodes.put("/1/0/2", 100);
             nodes.put("/5/0/1", "coap://localhost:5685");
             nodes.put("/5/0/1", "coap://localhost:5685");
-            defaultLwM2MDownlinkMsgHandler.sendWriteCompositeRequest(lwM2MClient, nodes, this);
+//            defaultLwM2MDownlinkMsgHandler.sendWriteCompositeRequest(lwM2MClient, nodes, this);
             this.sendObserveRequests(lwM2MClient, profile, supportedObjects);
             this.sendObserveRequests(lwM2MClient, profile, supportedObjects);
             this.sendWriteAttributeRequests(lwM2MClient, profile, supportedObjects);
             this.sendWriteAttributeRequests(lwM2MClient, profile, supportedObjects);
 //            Removed. Used only for debug.
 //            Removed. Used only for debug.

@@ -42,7 +42,7 @@ public interface LwM2mUplinkMsgHandler {
 
 
     void onUpdateValueAfterReadResponse(Registration registration, String path, ReadResponse response);
     void onUpdateValueAfterReadResponse(Registration registration, String path, ReadResponse response);
 
 
-    void onUpdateValueAfterReadCompositeResponse(Registration registration, String path, ReadCompositeResponse response);
+    void onUpdateValueAfterReadCompositeResponse(Registration registration, ReadCompositeResponse response);
 
 
     void onDeviceProfileUpdate(TransportProtos.SessionInfoProto sessionInfo, DeviceProfile deviceProfile);
     void onDeviceProfileUpdate(TransportProtos.SessionInfoProto sessionInfo, DeviceProfile deviceProfile);