diff --git a/tools/tcat_ble_client/cli/dataset_commands.py b/tools/tcat_ble_client/cli/dataset_commands.py
index bac050ddf..8fd268ea8 100644
--- a/tools/tcat_ble_client/cli/dataset_commands.py
+++ b/tools/tcat_ble_client/cli/dataset_commands.py
@@ -29,6 +29,7 @@
 from cli.command import Command, CommandResultNone
 from dataset.dataset import ThreadDataset, initial_dataset
 from tlv.dataset_tlv import MeshcopTlvType
+from copy import deepcopy
 
 
 def handle_dataset_entry_command(type: MeshcopTlvType, args, context):
@@ -71,13 +72,23 @@ class DatasetHelpCommand(Command):
         return CommandResultNone()
 
 
-class PrintDatasetHexCommand(Command):
+class DatasetHexCommand(Command):
 
     def get_help_string(self) -> str:
-        return 'Print current dataset as a hexadecimal string.'
+        return 'Get or set dataset as hex-encoded TLVs.'
 
     async def execute_default(self, args, context):
         ds: ThreadDataset = context['dataset']
+        if args:
+            try:
+                ds_tmp = deepcopy(ds)
+                tlvs_str: str = args[0]
+                tlvs_bytes = bytes.fromhex(tlvs_str)
+                ds_tmp.set_from_bytes(tlvs_bytes)
+                ds.clear()
+                ds.set_from_bytes(tlvs_bytes)
+            except Exception as e:
+                print(e)
         print(ds.to_bytes().hex())
         return CommandResultNone()
 
@@ -207,7 +218,7 @@ class DatasetCommand(Command):
         self._subcommands = {
             'clear': DatasetClearCommand(),
             'help': DatasetHelpCommand(),
-            'hex': PrintDatasetHexCommand(),
+            'hex': DatasetHexCommand(),
             'reload': ReloadDatasetCommand(),
             'activetimestamp': ActiveTimestampCommand(),
             'pendingtimestamp': PendingTimestampCommand(),
diff --git a/tools/tcat_ble_client/dataset/dataset.py b/tools/tcat_ble_client/dataset/dataset.py
index 384bd2652..6c3d6be7d 100644
--- a/tools/tcat_ble_client/dataset/dataset.py
+++ b/tools/tcat_ble_client/dataset/dataset.py
@@ -18,7 +18,7 @@ from typing import Dict, List
 
 from tlv.tlv import TLV
 from tlv.dataset_tlv import MeshcopTlvType
-from dataset.dataset_entries import DatasetEntry, create_dataset_entry
+from dataset.dataset_entries import DatasetEntry, create_dataset_entry, ENTRY_CLASSES
 
 initial_dataset = bytes([
     0x0E, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x12, 0x35, 0x06, 0x00, 0x04,
@@ -58,8 +58,11 @@ class ThreadDataset:
         return self.entries[type]
 
     def set_entry(self, type: MeshcopTlvType, args: List[str]):
-        if type in self.entries:
-            self.entries[type].set(args)
+        if type in ENTRY_CLASSES:
+            if type in self.entries:
+                self.entries[type].set(args)
+            else:
+                self.entries[type] = create_dataset_entry(type, args)
             return
         raise KeyError(f'Key {type} not available in the dataset.')
 
diff --git a/tools/tcat_ble_client/dataset/dataset_entries.py b/tools/tcat_ble_client/dataset/dataset_entries.py
index 20d470e36..d68e65c5c 100644
--- a/tools/tcat_ble_client/dataset/dataset_entries.py
+++ b/tools/tcat_ble_client/dataset/dataset_entries.py
@@ -476,23 +476,24 @@ class ChannelMaskEntry(DatasetEntry):
         return TLV.from_bytes(tlv)
 
 
-def create_dataset_entry(type: MeshcopTlvType, args=None):
-    entry_classes = {
-        MeshcopTlvType.ACTIVETIMESTAMP: ActiveTimestamp,
-        MeshcopTlvType.PENDINGTIMESTAMP: PendingTimestamp,
-        MeshcopTlvType.NETWORKKEY: NetworkKey,
-        MeshcopTlvType.NETWORKNAME: NetworkName,
-        MeshcopTlvType.EXTPANID: ExtPanID,
-        MeshcopTlvType.MESHLOCALPREFIX: MeshLocalPrefix,
-        MeshcopTlvType.DELAYTIMER: DelayTimer,
-        MeshcopTlvType.PANID: PanID,
-        MeshcopTlvType.CHANNEL: Channel,
-        MeshcopTlvType.PSKC: Pskc,
-        MeshcopTlvType.SECURITYPOLICY: SecurityPolicy,
-        MeshcopTlvType.CHANNELMASK: ChannelMask
-    }
+ENTRY_CLASSES = {
+    MeshcopTlvType.ACTIVETIMESTAMP: ActiveTimestamp,
+    MeshcopTlvType.PENDINGTIMESTAMP: PendingTimestamp,
+    MeshcopTlvType.NETWORKKEY: NetworkKey,
+    MeshcopTlvType.NETWORKNAME: NetworkName,
+    MeshcopTlvType.EXTPANID: ExtPanID,
+    MeshcopTlvType.MESHLOCALPREFIX: MeshLocalPrefix,
+    MeshcopTlvType.DELAYTIMER: DelayTimer,
+    MeshcopTlvType.PANID: PanID,
+    MeshcopTlvType.CHANNEL: Channel,
+    MeshcopTlvType.PSKC: Pskc,
+    MeshcopTlvType.SECURITYPOLICY: SecurityPolicy,
+    MeshcopTlvType.CHANNELMASK: ChannelMask
+}
 
-    entry_class = entry_classes.get(type)
+
+def create_dataset_entry(type: MeshcopTlvType, args=None):
+    entry_class = ENTRY_CLASSES.get(type)
     if not entry_class:
         raise ValueError(f"Invalid configuration type: {type}")