diff --git a/apps/code/catalog.universal.i18n b/apps/code/catalog.universal.i18n
index 2dd492f00..08487fcad 100644
--- a/apps/code/catalog.universal.i18n
+++ b/apps/code/catalog.universal.i18n
@@ -204,6 +204,9 @@ PythonCommandNumpyTranspose = "ndarray.transpose()"
 PythonCommandNumpyTransposeWithoutArg = ".transpose()"
 PythonCommandNumpySort = "ndarray.sort()"
 PythonCommandNumpySortWithoutArg = ".sort()"
+PythonCommandNumpyFromBuffer = "ndarray.frombuffer(b)"
+PythonCommandNumpyToBytes = "ndarray.tobytes()"
+PythonCommandNumpyToBytesWithoutArg = ".tobytes()"
 PythonCommandNumpySetPrintOptions = "np.set_printoptions()"
 PythonCommandNumpyGetPrintOptions = "np.get_printoptions()"
 PythonCommandNumpyNdinfo = "np.ndinfo(a)"
diff --git a/apps/code/python_toolbox.cpp b/apps/code/python_toolbox.cpp
index f78040216..bde91dc63 100644
--- a/apps/code/python_toolbox.cpp
+++ b/apps/code/python_toolbox.cpp
@@ -149,15 +149,17 @@ const ToolboxMessageTree NumpyNdarrayModuleChildren[] = {
   ToolboxMessageTree::Leaf(I18n::Message::PythonCommandNumpyFull),
   ToolboxMessageTree::Leaf(I18n::Message::PythonCommandNumpyLinspace),
   ToolboxMessageTree::Leaf(I18n::Message::PythonCommandNumpyLogspace),
-  ToolboxMessageTree::Leaf(I18n::Message::PythonCommandNumpyCopy),
-  ToolboxMessageTree::Leaf(I18n::Message::PythonCommandNumpyDtype),
-  ToolboxMessageTree::Leaf(I18n::Message::PythonCommandNumpyFlat),
-  ToolboxMessageTree::Leaf(I18n::Message::PythonCommandNumpyFlatten),
-  ToolboxMessageTree::Leaf(I18n::Message::PythonCommandNumpyShape),
-  ToolboxMessageTree::Leaf(I18n::Message::PythonCommandNumpyReshape),
-  ToolboxMessageTree::Leaf(I18n::Message::PythonCommandNumpySize),
-  ToolboxMessageTree::Leaf(I18n::Message::PythonCommandNumpyTranspose),
-  ToolboxMessageTree::Leaf(I18n::Message::PythonCommandNumpySort),  
+  ToolboxMessageTree::Leaf(I18n::Message::PythonCommandNumpyFromBuffer),  
+  ToolboxMessageTree::Leaf(I18n::Message::PythonCommandNumpyCopy, I18n::Message::Default, false, I18n::Message::PythonCommandNumpyCopyWithoutArg),
+  ToolboxMessageTree::Leaf(I18n::Message::PythonCommandNumpyDtype, I18n::Message::Default, false, I18n::Message::PythonCommandNumpyDtypeWithoutArg),
+  ToolboxMessageTree::Leaf(I18n::Message::PythonCommandNumpyFlat, I18n::Message::Default, false, I18n::Message::PythonCommandNumpyFlatWithoutArg),
+  ToolboxMessageTree::Leaf(I18n::Message::PythonCommandNumpyFlatten, I18n::Message::Default, false, I18n::Message::PythonCommandNumpyFlattenWithoutArg),
+  ToolboxMessageTree::Leaf(I18n::Message::PythonCommandNumpyShape, I18n::Message::Default, false, I18n::Message::PythonCommandNumpyShapeWithoutArg),
+  ToolboxMessageTree::Leaf(I18n::Message::PythonCommandNumpyReshape, I18n::Message::Default, false, I18n::Message::PythonCommandNumpyReshapeWithoutArg),
+  ToolboxMessageTree::Leaf(I18n::Message::PythonCommandNumpySize, I18n::Message::Default, false, I18n::Message::PythonCommandNumpySizeWithoutArg),
+  ToolboxMessageTree::Leaf(I18n::Message::PythonCommandNumpyTranspose, I18n::Message::Default, false, I18n::Message::PythonCommandNumpyTransposeWithoutArg),
+  ToolboxMessageTree::Leaf(I18n::Message::PythonCommandNumpySort, I18n::Message::Default, false, I18n::Message::PythonCommandNumpySortWithoutArg),  
+  ToolboxMessageTree::Leaf(I18n::Message::PythonCommandNumpyToBytes, I18n::Message::Default, false, I18n::Message::PythonCommandNumpyToBytesWithoutArg)
 };
 
 const ToolboxMessageTree NumpyFunctionsModuleChildren[] = {
diff --git a/python/port/mod/ulab/ulab.h b/python/port/mod/ulab/ulab.h
index 93cb77abe..f57db68c6 100644
--- a/python/port/mod/ulab/ulab.h
+++ b/python/port/mod/ulab/ulab.h
@@ -223,7 +223,7 @@
 #endif
 
 #ifndef NDARRAY_HAS_TOBYTES
-#define NDARRAY_HAS_TOBYTES             (0)
+#define NDARRAY_HAS_TOBYTES             (1)
 #endif
 
 #ifndef NDARRAY_HAS_TRANSPOSE
@@ -264,7 +264,7 @@
 
 // frombuffer adds 600 bytes to the firmware
 #ifndef ULAB_NUMPY_HAS_FROMBUFFER
-#define ULAB_NUMPY_HAS_FROMBUFFER       (0)
+#define ULAB_NUMPY_HAS_FROMBUFFER       (1)
 #endif
 
 // functions that create an array
diff --git a/python/port/mpconfigport.h b/python/port/mpconfigport.h
index ba9baba18..0da15cb98 100644
--- a/python/port/mpconfigport.h
+++ b/python/port/mpconfigport.h
@@ -55,7 +55,7 @@
 #define MICROPY_PY_ASYNC_AWAIT (0)
 
 // Whether to support bytearray object
-#define MICROPY_PY_BUILTINS_BYTEARRAY (0)
+#define MICROPY_PY_BUILTINS_BYTEARRAY (1)
 
 // Whether to support frozenset object
 #define MICROPY_PY_BUILTINS_FROZENSET (1)