Add namespace support for uxrce-dds client during firmware upload (#25291)

src/modules/uxrce_dds_client/generate_dds_topics.py

@@ -79,10 +79,16 @@ if not os.path.exists(folder_name):
 with open(args.yaml_file, 'r') as file:
     msg_map = yaml.safe_load(file)
 
+# Get DDS namespace from environment, default to empty string
+namespace = os.getenv('PX4_UXRCE_DDS_NS', '')
+
 merged_em_globals = {}
 all_type_includes = []
 
 def process_message_type(msg_type):
+    # Add namespace to topic
+    msg_type['topic'] = f"/{namespace}{msg_type['topic']}" if namespace else msg_type['topic']
+
     # eg TrajectoryWaypoint from px4_msgs::msg::TrajectoryWaypoint
     simple_base_type = msg_type['type'].split('::')[-1]
 
@@ -96,6 +102,8 @@ def process_message_type(msg_type):
     # topic_simple: eg vehicle_status
     msg_type['topic_simple'] = msg_type['topic'].split('/')[-1]
 
+merged_em_globals['namespace'] = namespace
+
 pubs_not_empty = msg_map['publications'] is not None
 if pubs_not_empty:
     for p in msg_map['publications']: