diff --git a/app/main.py b/app/main.py
index 64e1486..eb23ae3 100644
--- a/app/main.py
+++ b/app/main.py
@@ -87,6 +87,7 @@ def clean_console_output(output: str, command: str) -> str:
     """
     Clean meshcli console output by removing:
     - Prompt lines (e.g., "MarWoj|*" or "DeviceName|*[E]")
+    - JSON packet lines (internal mesh protocol data)
     - Echoed command line
     - Leading/trailing whitespace
     """
@@ -112,6 +113,10 @@ def clean_console_output(output: str, command: str) -> str:
         if prompt_pattern.match(stripped):
             continue
 
+        # Skip JSON packet lines (internal mesh protocol data)
+        if stripped.startswith('{') and '"payload_typename"' in stripped:
+            continue
+
         cleaned_lines.append(line)
 
     # Remove leading empty lines