From 0a3407db00143a8f57dc28fa59b8b17fbeef6b91 Mon Sep 17 00:00:00 2001
From: Jared Newell <jared.newell@mobilityhouse.com>
Date: Tue, 7 Nov 2023 08:18:35 +0100
Subject: [PATCH 1/3] update to match Appendix 2. Standardized Units Of Measure

---
 CHANGELOG.md      | 2 ++
 ocpp/v16/enums.py | 1 +
 2 files changed, 3 insertions(+)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 021a35bbd..e672ff369 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,7 @@
 # Change log
 
+- [#510](https://github.com/mobilityhouse/ocpp/issues/510) v2.0.1 UnitOfMeasureType - Enums missing and update docstring to allow use for variableCharacteristics
+
 ## 0.22.0 (2023-11-03)
 
 - [#493](https://github.com/mobilityhouse/ocpp/issues/493) Reduce use of NotSupportedError in favor of NotImplementedError. Thanks [drc38](@https://github.com/drc38).
diff --git a/ocpp/v16/enums.py b/ocpp/v16/enums.py
index 8071fe17c..cd35bfb62 100644
--- a/ocpp/v16/enums.py
+++ b/ocpp/v16/enums.py
@@ -773,6 +773,7 @@ class UnitOfMeasure(str, Enum):
     k = "K"
     percent = "Percent"
     hertz = "Hertz"
+    b = "Bytes"
 
 
 class UnlockStatus(str, Enum):

From 3f5ed5a62fdf89d8ab2dd726554f893e378ec18c Mon Sep 17 00:00:00 2001
From: Jared Newell <jared.newell@mobilityhouse.com>
Date: Tue, 7 Nov 2023 08:25:36 +0100
Subject: [PATCH 2/3] update doc string to include variableCharacteristics

---
 ocpp/v16/enums.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/ocpp/v16/enums.py b/ocpp/v16/enums.py
index cd35bfb62..c91fe9b79 100644
--- a/ocpp/v16/enums.py
+++ b/ocpp/v16/enums.py
@@ -753,7 +753,8 @@ class UnitOfMeasure(str, Enum):
     """
     Allowable values of the optional "unit" field of a Value element, as used
     in MeterValues.req and StopTransaction.req messages. Default value of
-    "unit" is always "Wh".
+    "unit" is always "Wh". Also used in 2.0.1 component/variables -
+    specifically the unit in variableCharacteristics.
     """
 
     wh = "Wh"

From 5fc65c4c00684eec8ffb7627f51b1b20a0636021 Mon Sep 17 00:00:00 2001
From: Jared Newell <jared.newell@mobilityhouse.com>
Date: Tue, 7 Nov 2023 09:08:01 +0100
Subject: [PATCH 3/3] correction to v201

---
 ocpp/v16/enums.py  | 4 +---
 ocpp/v201/enums.py | 3 ++-
 2 files changed, 3 insertions(+), 4 deletions(-)

diff --git a/ocpp/v16/enums.py b/ocpp/v16/enums.py
index c91fe9b79..8071fe17c 100644
--- a/ocpp/v16/enums.py
+++ b/ocpp/v16/enums.py
@@ -753,8 +753,7 @@ class UnitOfMeasure(str, Enum):
     """
     Allowable values of the optional "unit" field of a Value element, as used
     in MeterValues.req and StopTransaction.req messages. Default value of
-    "unit" is always "Wh". Also used in 2.0.1 component/variables -
-    specifically the unit in variableCharacteristics.
+    "unit" is always "Wh".
     """
 
     wh = "Wh"
@@ -774,7 +773,6 @@ class UnitOfMeasure(str, Enum):
     k = "K"
     percent = "Percent"
     hertz = "Hertz"
-    b = "Bytes"
 
 
 class UnlockStatus(str, Enum):
diff --git a/ocpp/v201/enums.py b/ocpp/v201/enums.py
index 30b12a756..50503d60f 100644
--- a/ocpp/v201/enums.py
+++ b/ocpp/v201/enums.py
@@ -1244,7 +1244,8 @@ class UnitOfMeasureType(str, Enum):
     """
     Allowable values of the optional "unit" field of a Value element, as used
     in MeterValues.req and StopTransaction.req messages. Default value of
-    "unit" is always "Wh".
+    "unit" is always "Wh". Also used in component/variables -
+    specifically the unit in variableCharacteristics.
     """
 
     asu = "ASU"