diff --git a/experiments/extensions/write_ext1.py b/experiments/extensions/write_ext1.py
new file mode 100755
index 0000000..57131ef
--- /dev/null
+++ b/experiments/extensions/write_ext1.py
@@ -0,0 +1,40 @@
+#!/usr/bin/env python
+"""
+Write adapter data without any custom fields
+"""
+import sys
+
+import ext1_pb2
+from voltha.protos import adapter_pb2
+from google.protobuf import any_pb2
+
+def custom_config():
+    any = any_pb2.Any()
+    any.Pack(ext1_pb2.AdapterConfig(
+        volume=20,
+        bass=50,
+        treble=50
+    ))
+    return any
+
+
+def custom_description():
+    any = any_pb2.Any()
+    any.Pack(ext1_pb2.AdapterDescription(
+        internal_name='hulu',
+        internal_code='foo',
+        price=42
+    ))
+    return any
+
+
+adapter = adapter_pb2.Adapter(
+    id='42',
+    config=adapter_pb2.AdapterConfig(
+        additional_config=custom_config()
+    ),
+    additional_description=custom_description()
+)
+
+sys.stdout.write(adapter.SerializeToString())
+