Quality optimizations

* Catch Volvo API not returning a valid json string #104

* Update changelog

README.md

@@ -32,6 +32,7 @@ If you like my work:<br>
 - XC60 PHEV (2022)
 - XC90 PHEV T8 (2023)
 - XC90 PHEV T8 (2024)
+- XC90 B5 Mildhybrid (2024)
 - V90 PHEV T8 (2019)*
 
 *only partly working
@@ -72,7 +73,7 @@ NOTE: Energy status currently available only for cars in the Europe / Middle Eas
 Just install this addon with the following command.
 Please note to fill in your settings inside the environment variables.
 
-`docker run -d --pull=always -e CONF_updateInterval=300 -e CONF_babelLocale='de' -e CONF_mqtt='@json {"broker": "", "username": "", "password": "", "port": 1883}' -e CONF_volvoData='@json {"username": "", "password": "", "vin": "", "vccapikey": "", "backupvccapikey": "", "odometerMultiplier": 1, "averageSpeedDivider": 1, "averageFuelConsumptionMultiplier": 1}' -e TZ='Europe/Berlin' --name volvo2mqtt ghcr.io/dielee/volvo2mqtt:latest`
+`docker run -d --pull=always -e CONF_updateInterval=300 -e CONF_babelLocale='de' -e CONF_mqtt='@json {"broker": "", "username": "", "password": "", "port": 1883}' -e CONF_volvoData='@json {"username": "", "password": "", "vin": "", "vccapikey": ["key1", "key2"], "odometerMultiplier": 1, "averageSpeedDivider": 1, "averageFuelConsumptionMultiplier": 1}' -e TZ='Europe/Berlin' --name volvo2mqtt ghcr.io/dielee/volvo2mqtt:latest`
 
 <b>HA Add-On:</b><br>
 

src/CHANGELOG.md

@@ -1,3 +1,60 @@
+## v1.8.11
+### 🐛 Bug Fixes:
+
+- Remove old code from checks for running engine sensor
+- Move battery charge level sensor from v2 to v1, as v2 returns 404
+
+## v1.8.10
+### 🐛 Bug Fixes:
+
+- Add `AJAR` state for sunroof #123
+
+## v1.8.9
+### 🐛 Bug Fixes:
+
+- Fix api changes from volvo #121
+
+## v1.8.8
+### 🐛 Bug Fixes:
+
+- Fix json decode error, if volvo API returns a simple string #104
+
+## v1.8.7
+### 🚀 Features:
+
+- Add option to disable log completely #96 
+
+### 🐛 Bug Fixes:
+
+- Fix regex error for some mailaddresses #97
+
+## v1.8.6
+### 🚀 Features:
+
+- Add option to use multiple docker containers (with different logins) #93
+
+## v1.8.5
+### 🚀 Features:
+
+- Allow phone number as username #91
+
+## v1.8.4
+### 🚀 Features:
+
+- Optimize Addon configuration #90
+
+## v1.8.3
+### 🚀 Features:
+
+- Add `device_class: battery` for battery state sensors from BEV and PHEV 
+
+## v1.8.2
+### 🚀 Features:
+
+- Add `updateInterval` limit to prevent abuse (60 Seconds)
+- Add `vccapikey` limit to prevent abuse (3 Keys)
+- Optimize vcc api key change behaviour
+
 ## v1.8.1
 ### 🐛 Bug Fixes:
 

src/config.yaml

@@ -1,6 +1,6 @@
 name: "Volvo2Mqtt"
 description: "Volvo AAOS MQTT bridge"
-version: "1.8.1"
+version: "1.8.11"
 slug: "volvo2mqtt"
 init: false
 url: "https://github.com/Dielee/volvo2mqtt"
@@ -15,6 +15,7 @@ options:
   babelLocale: null
   TZ: null
   debug: false
+  disable_logging: false
   mqtt:
     broker: "auto_broker"
     port: "auto_port"
@@ -24,26 +25,28 @@ options:
     username: null
     password: null
     vin: ""
-    vccapikey: null
+    vccapikey:
+        - null
     odometerMultiplier: 1
     averageSpeedDivider: 1
     averageFuelConsumptionMultiplier: 1
 schema:
-  updateInterval: int(10,)
+  updateInterval: int(60,)
   babelLocale: str
-  TZ: str
+  TZ: match(^.+/.+$)
   debug: bool
+  disable_logging: bool
   mqtt:
     broker: str
     port: str
     username: str?
     password: str?
   volvoData:
-    username: str
+    username: match(^([a-zA-Z0-9_.+-]+@[a-zA-Z0-9-]+\.[a-zA-Z0-9-.]+)|(\+\d{5,20})$)
     password: str
     vin: str?
     vccapikey:
-        - str
+        - match(^\b\w{32}\b$)
     odometerMultiplier: int(1,)
     averageSpeedDivider: int(1,)
     averageFuelConsumptionMultiplier: int(1,)

src/const.py

@@ -1,6 +1,6 @@
 from config import settings
 
-VERSION = "v1.8.1"
+VERSION = "v1.8.11"
 
 OAUTH_URL = "https://volvoid.eu.volvocars.com/as/token.oauth2"
 VEHICLES_URL = "https://api.volvocars.com/connected-vehicle/v1/vehicles"
@@ -16,7 +16,7 @@ ODOMETER_STATE_URL = "https://api.volvocars.com/connected-vehicle/v2/vehicles/{0
 LOCATION_STATE_URL = "https://api.volvocars.com/location/v1/vehicles/{0}/location"
 TYRE_STATE_URL = "https://api.volvocars.com/connected-vehicle/v2/vehicles/{0}/tyres"
 ENGINE_STATE_URL = "https://api.volvocars.com/connected-vehicle/v2/vehicles/{0}/engine-status"
-BATTERY_CHARGE_STATE_URL = "https://api.volvocars.com/connected-vehicle/v2/vehicles/{0}/battery-charge-level"
+BATTERY_CHARGE_STATE_URL = "https://api.volvocars.com/connected-vehicle/v1/vehicles/{0}/battery-charge-level"
 FUEL_STATE_URL = "https://api.volvocars.com/connected-vehicle/v2/vehicles/{0}/fuel"
 STATISTICS_URL = "https://api.volvocars.com/connected-vehicle/v2/vehicles/{0}/statistics"
 ENGINE_DIAGNOSTICS_URL = "https://api.volvocars.com/connected-vehicle/v2/vehicles/{0}/engine"
@@ -51,7 +51,7 @@ charging_connection_states = {"CONNECTION_STATUS_DISCONNECTED": "Disconnected",
                               "CONNECTION_STATUS_FAULT": "Fault"}
 
 window_states = {"CLOSED": "OFF", "OPEN": "ON"}
-door_states = {"CLOSED": "OFF", "OPEN": "ON"}
+door_states = {"CLOSED": "OFF", "OPEN": "ON", "UNSPECIFIED": "UNKNOWN", "AJAR": "ON"}
 engine_states = {"RUNNING": "ON", "STOPPED": "OFF", "true": "ON", "false": "OFF"}
 
 icon_states = {
@@ -77,8 +77,8 @@ icon_states = {
 }
 
 supported_entities = [
-                        {"name": "Battery Charge Level", "domain": "sensor", "id": "battery_charge_level", "unit": "%", "icon": "car-battery", "url": RECHARGE_STATE_URL, "state_class": "measurement"},
+                        {"name": "Battery Charge Level", "domain": "sensor", "device_class": "battery", "id": "battery_charge_level", "unit": "%", "icon": "car-battery", "url": RECHARGE_STATE_URL, "state_class": "measurement"},
-                        {"name": "Battery Charge Level", "domain": "sensor", "id": "battery_charge_level", "unit": "%", "icon": "car-battery", "url": BATTERY_CHARGE_STATE_URL, "state_class": "measurement"},
+                        {"name": "Battery Charge Level", "domain": "sensor", "device_class": "battery", "id": "battery_charge_level", "unit": "%", "icon": "car-battery", "url": BATTERY_CHARGE_STATE_URL, "state_class": "measurement"},
                         {"name": "Electric Range", "domain": "sensor", "id": "electric_range", "unit": "km" if not units.get(settings["babelLocale"]) else units[settings["babelLocale"]]["electric_range"]["unit"], "icon": "map-marker-distance", "url": RECHARGE_STATE_URL, "state_class": "measurement"},
                         {"name": "Estimated Charging Time", "domain": "sensor", "id": "estimated_charging_time", "unit": "minutes", "icon": "timer-sync-outline", "url": RECHARGE_STATE_URL, "state_class": "measurement"},
                         {"name": "Charging System Status", "domain": "sensor", "id": "charging_system_status", "icon": "ev-station", "url": RECHARGE_STATE_URL},
@@ -108,7 +108,6 @@ supported_entities = [
                         {"name": "Tire Rear Left", "domain": "sensor", "id": "tyre_rear_left", "icon": "car-tire-alert", "url": TYRE_STATE_URL},
                         {"name": "Tire Rear Right", "domain": "sensor", "id": "tyre_rear_right", "icon": "car-tire-alert", "url": TYRE_STATE_URL},
                         {"name": "Engine State", "domain": "binary_sensor", "device_class": "running", "id": "engine_state", "icon": "engine", "url": ENGINE_STATE_URL},
-                        {"name": "Engine State", "domain": "binary_sensor", "device_class": "running", "id": "engine_state", "icon": "engine", "url": ENGINE_DIAGNOSTICS_URL},
                         {"name": "Fuel Level", "domain": "sensor", "id": "fuel_level", "unit": "liters", "icon": "fuel", "url": FUEL_STATE_URL, "state_class": "measurement"},
                         {"name": "Average Fuel Consumption", "domain": "sensor", "id": "average_fuel_consumption", "unit": "liters", "icon": "fuel", "url": STATISTICS_URL},
                         {"name": "Distance to Empty", "domain": "sensor", "id": "distance_to_empty", "unit": "km" if not units.get(settings["babelLocale"]) else units[settings["babelLocale"]]["distance_to_empty"]["unit"], "icon": "map-marker-distance", "url": STATISTICS_URL, "state_class": "measurement"},

src/main.py

@@ -2,14 +2,15 @@ import logging
 from volvo import authorize
 from mqtt import update_loop, connect
 from const import VERSION
-from util import set_tz, setup_logging, set_mqtt_settings
+from util import set_tz, setup_logging, set_mqtt_settings, validate_settings
 
 
 if __name__ == '__main__':
-    set_tz()
-    set_mqtt_settings()
     setup_logging()
     logging.info("Starting volvo2mqtt version " + VERSION)
+    validate_settings()
+    set_tz()
+    set_mqtt_settings()
     connect()
     authorize()
     update_loop()

src/mqtt.py

@@ -4,6 +4,7 @@ import paho.mqtt.client as mqtt
 import json
 import volvo
 import util
+import os
 from threading import Thread, Timer
 from datetime import datetime
 from babel.dates import format_datetime
@@ -23,7 +24,9 @@ active_schedules = {}
 
 
 def connect():
-    client = mqtt.Client("volvoAAOS2mqtt")
+    client = mqtt.Client("volvoAAOS2mqtt") if os.environ.get("IS_HA_ADDON") \
+        else mqtt.Client("volvoAAOS2mqtt_" + settings.volvoData["username"].replace("+", ""))
+
     client.will_set(availability_topic, "offline", 0, False)
     if settings["mqtt"]["username"] and settings["mqtt"]["password"]:
         client.username_pw_set(settings["mqtt"]["username"], settings["mqtt"]["password"])
@@ -252,11 +255,12 @@ def update_car_data(force_update=False, overwrite={}):
             else:
                 topic = f"homeassistant/{entity['domain']}/{vin}_{entity['id']}/state"
 
-            mqtt_client.publish(
+            if state:
-                topic,
+                mqtt_client.publish(
-                json.dumps(state) if isinstance(state, dict) or isinstance(state, list) else state
+                    topic,
-            )
+                    json.dumps(state) if isinstance(state, dict) or isinstance(state, list) else state
-            update_ha_device(entity, vin, state)
+                )
+                update_ha_device(entity, vin, state)
 
 
 def update_ha_device(entity, vin, state):

src/settings.json

@@ -2,6 +2,8 @@
   "updateInterval": 300,
   "babelLocale": "de",
   "TZ": "Europe/Berlin",
+  "debug": false,
+  "disable_logging": false,
   "mqtt": {
     "broker": "",
     "port": 1883,

src/translations/en.yaml

@@ -11,6 +11,9 @@ configuration:
   debug:
     name: API debug mode
     description: Enable Volvo API debug, normaly this can stay off. If enabled, the complete log file can be found under \\<Your HA Host IP>\addons\volvo2mqtt\log\volvo2mqtt.log.
+  disable_logging:
+    name: Disable logging
+    description: Disable logging completely to reduce IO and SD card access.
   mqtt:
     name: MQTT Broker settings
     description: Leave the settings as they are if you are using the MQTT Mosquitto Addon. If not, take a look at the readme from volvo2mqtt.

src/util.py

@@ -68,6 +68,10 @@ def setup_logging():
         if settings["debug"]:
             logger.setLevel(logging.DEBUG)
 
+    if "disable_logging" in settings:
+        if settings["disable_logging"]:
+            logger.setLevel(logging.ERROR)
+
 
 def check_existing_folder():
     Path("/addons/volvo2mqtt/log/").mkdir(parents=True, exist_ok=True)
@@ -136,3 +140,15 @@ def set_mqtt_settings():
         config.settings["mqtt"]["port"] = broker_port
         config.settings["mqtt"]["username"] = broker_user
         config.settings["mqtt"]["password"] = broker_pass
+
+
+def validate_settings():
+    if not os.environ.get("DEV_MODE"):
+        setting_keys = settings.volvoData["vccapikey"]
+        if isinstance(setting_keys, list):
+            if len(setting_keys) > 3:
+                raise Exception("Settings invalid! Maximum allowed vccapikeys are three!")
+
+        update_interval = settings["updateInterval"]
+        if update_interval < 60:
+            raise Exception("Settings invalid! Minimum allowed update interval is 60 seconds!")

src/volvo.py

@@ -8,6 +8,7 @@ from threading import currentThread
 from datetime import datetime, timedelta
 from config import settings
 from babel.dates import format_datetime
+from json import JSONDecodeError
 from const import charging_system_states, charging_connection_states, door_states, window_states, \
     OAUTH_URL, VEHICLES_URL, VEHICLE_DETAILS_URL, RECHARGE_STATE_URL, CLIMATE_START_URL, \
     WINDOWS_STATE_URL, LOCK_STATE_URL, TYRE_STATE_URL, supported_entities, BATTERY_CHARGE_STATE_URL, \
@@ -119,28 +120,32 @@ def get_vehicles():
 
 
 def get_vcc_api_keys(used_key=None):
-    setting_keys = settings.volvoData["vccapikey"]
+    working_keys = None
-    if isinstance(setting_keys, str):
-        set_key_state(setting_keys)
-    elif isinstance(setting_keys, list):
-        for key in setting_keys:
-            set_key_state(key)
 
-    logging.debug(str(vcc_api_keys))
+    while not working_keys:
-    working_keys = [key["key"] for key in vcc_api_keys if not key.get("extended") and key.get('key') != used_key]
+        setting_keys = settings.volvoData["vccapikey"]
-    if len(working_keys) < 1:
+        if isinstance(setting_keys, str):
-        logging.warning("No working VCCAPIKEY found, waiting 10 minutes. Then trying again!")
+            set_key_state(setting_keys)
-        mqtt.send_offline()
+        elif isinstance(setting_keys, list):
-        time.sleep(600)
+            for key in setting_keys:
-        get_vcc_api_keys(used_key=None)
+                set_key_state(key)
-        return None
 
-    mqtt.send_heartbeat()
+        logging.debug(str(vcc_api_keys))
-    session.headers.update({"vcc-api-key": working_keys[0]})
+        working_keys = [key["key"] for key in vcc_api_keys if not key.get("extended") and key.get('key') != used_key]
-    logging.info("Using VCCAPIKEY: " + working_keys[0])
+        if len(working_keys) < 1:
-    for key_dict in vcc_api_keys:
+            used_key = None
-        if key_dict["key"] == working_keys[0]:
+            logging.warning("No working VCCAPIKEY found, waiting 10 minutes. Then trying again!")
-            key_dict["in_use"] = True
+            mqtt.send_offline()
+            time.sleep(600)
+        else:
+            mqtt.send_heartbeat()
+            session.headers.update({"vcc-api-key": working_keys[0]})
+            logging.info("Using VCCAPIKEY: " + working_keys[0])
+            for key_dict in vcc_api_keys:
+                if key_dict["key"] == working_keys[0]:
+                    key_dict["in_use"] = True
+
+        logging.debug(str(vcc_api_keys))
 
 
 def set_key_state(key):
@@ -160,6 +165,8 @@ def set_key_state(key):
 def check_vcc_api_key(test_key, extended_until=None):
     if extended_until:
         if extended_until >= datetime.now():
+            logging.warning("VCCAPIKEY " + test_key + " is extended and will be reusable at: "
+                            + format_datetime(extended_until, format="medium", locale=settings["babelLocale"]))
             return True, extended_until
 
     if datetime.now(util.TZ) >= token_expires_at:
@@ -238,11 +245,6 @@ def check_supported_endpoints():
                 # If battery charge level could be found in recharge-api, skip the second battery charge sensor
                 continue
 
-            if entity["id"] == "engine_state" and entity["url"] == ENGINE_DIAGNOSTICS_URL \
-                    and any("engine_state" in d["id"] for d in supported_endpoints[vin]):
-                # If engine state could be found in engine state endpoint, skip the second engine running sensor
-                continue
-
             if entity.get('url'):
                 state = api_call(entity["url"], "GET", vin, entity["id"])
             else:
@@ -341,7 +343,11 @@ def api_call(url, method, vin, sensor_id=None, force_update=False, key_change=Fa
         return None
 
     logging.debug("Response status code: " + str(response.status_code))
-    data = response.json()
+    try:
+        data = response.json()
+    except JSONDecodeError as e:
+        logging.error("Fetched json decode error, Volvo API seems to return garbage. Skipping update. Error: " + str(e))
+        return None
 
     if response.status_code == 200:
         logging.debug(response.text)
@@ -437,7 +443,7 @@ def parse_api_data(data, sensor_id=None):
                 return ""
         return None
     elif sensor_id == "lock_status":
-        return data["carLocked"]["value"] if util.keys_exists(data, "carLocked") else None
+        return data["centralLock"]["value"] if util.keys_exists(data, "centralLock") else None
     elif sensor_id == "odometer":
         multiplier = 1
         if util.keys_exists(settings["volvoData"], "odometerMultiplier"):
@@ -449,44 +455,44 @@ def parse_api_data(data, sensor_id=None):
         return util.convert_metric_values(int(data["odometer"]["value"]) * multiplier) \
             if util.keys_exists(data, "odometer") else None
     elif sensor_id == "window_front_left":
-        return window_states[data["frontLeftWindowOpen"]["value"]] if util.keys_exists(data, "frontLeftWindowOpen") \
+        return window_states[data["frontLeftWindow"]["value"]] if util.keys_exists(data, "frontLeftWindow") \
             else None
     elif sensor_id == "window_front_right":
-        return window_states[data["frontRightWindowOpen"]["value"]] if util.keys_exists(data, "frontRightWindowOpen") \
+        return window_states[data["frontRightWindow"]["value"]] if util.keys_exists(data, "frontRightWindow") \
             else None
     elif sensor_id == "window_rear_left":
-        return window_states[data["rearLeftWindowOpen"]["value"]] if util.keys_exists(data, "rearLeftWindowOpen") \
+        return window_states[data["rearLeftWindow"]["value"]] if util.keys_exists(data, "rearLeftWindow") \
             else None
     elif sensor_id == "window_rear_right":
-        return window_states[data["rearRightWindowOpen"]["value"]] if util.keys_exists(data, "rearRightWindowOpen") \
+        return window_states[data["rearRightWindow"]["value"]] if util.keys_exists(data, "rearRightWindow") \
             else None
     elif sensor_id == "door_front_left":
-        return door_states[data["frontLeftDoorOpen"]["value"]] if util.keys_exists(data, "frontLeftDoorOpen") else None
+        return door_states[data["frontLeftDoor"]["value"]] if util.keys_exists(data, "frontLeftDoor") else None
     elif sensor_id == "door_front_right":
-        return door_states[data["frontRightDoorOpen"]["value"]] \
+        return door_states[data["frontRightDoor"]["value"]] \
-            if util.keys_exists(data, "frontRightDoorOpen") else None
+            if util.keys_exists(data, "frontRightDoor") else None
     elif sensor_id == "door_rear_left":
-        return door_states[data["rearLeftDoorOpen"]["value"]] if util.keys_exists(data, "rearLeftDoorOpen") else None
+        return door_states[data["rearLeftDoor"]["value"]] if util.keys_exists(data, "rearLeftDoor") else None
     elif sensor_id == "door_rear_right":
-        return door_states[data["rearRightDoorOpen"]["value"]] if util.keys_exists(data, "rearRightDoorOpen") else None
+        return door_states[data["rearRightDoor"]["value"]] if util.keys_exists(data, "rearRightDoor") else None
     elif sensor_id == "tailgate":
-        return door_states[data["tailGateOpen"]["value"]] if util.keys_exists(data, "tailGateOpen") else None
+        return door_states[data["tailgate"]["value"]] if util.keys_exists(data, "tailgate") else None
     elif sensor_id == "sunroof":
-        return door_states[data["sunRoofOpen"]["value"]] if util.keys_exists(data, "sunRoofOpen") else None
+        return door_states[data["sunroof"]["value"]] if util.keys_exists(data, "sunroof") else None
     elif sensor_id == "engine_hood":
-        return door_states[data["hoodOpen"]["value"]] if util.keys_exists(data, "hoodOpen") else None
+        return door_states[data["hood"]["value"]] if util.keys_exists(data, "hood") else None
     elif sensor_id == "tank_lid":
-        return door_states[data["tankLidOpen"]["value"]] if util.keys_exists(data, "tankLidOpen") else None
+        return door_states[data["tankLid"]["value"]] if util.keys_exists(data, "tankLid") else None
     elif sensor_id == "tyre_front_left":
-        return data["frontLeftTyrePressure"]["value"] if util.keys_exists(data, "frontLeftTyrePressure") else None
+        return data["frontLeft"]["value"] if util.keys_exists(data, "frontLeft") else None
     elif sensor_id == "tyre_front_right":
-        return data["frontRightTyrePressure"]["value"] if util.keys_exists(data, "frontRightTyrePressure") else None
+        return data["frontRight"]["value"] if util.keys_exists(data, "frontRight") else None
     elif sensor_id == "tyre_rear_left":
-        return data["rearLeftTyrePressure"]["value"] if util.keys_exists(data, "rearLeftTyrePressure") else None
+        return data["rearLeft"]["value"] if util.keys_exists(data, "rearLeft") else None
     elif sensor_id == "tyre_rear_right":
-        return data["rearRightTyrePressure"]["value"] if util.keys_exists(data, "rearRightTyrePressure") else None
+        return data["rearRight"]["value"] if util.keys_exists(data, "rearRight") else None
     elif sensor_id == "engine_state":
-        return engine_states[data["engineRunning"]["value"]] if util.keys_exists(data, "engineRunning") else None
+        return engine_states[data["engineStatus"]["value"]] if util.keys_exists(data, "engineStatus") else None
     elif sensor_id == "fuel_level":
         if util.keys_exists(data, "fuelAmount"):
             fuel_amount = float(data["fuelAmount"]["value"])
@@ -537,16 +543,16 @@ def parse_api_data(data, sensor_id=None):
     elif sensor_id == "hours_to_service":
         return data["engineHoursToService"]["value"] if util.keys_exists(data, "engineHoursToService") else None
     elif sensor_id == "km_to_service":
-        if util.keys_exists(data, "kmToService"):
+        if util.keys_exists(data, "distanceToService"):
-            km_to_service = int(data["kmToService"]["value"])
+            km_to_service = int(data["distanceToService"]["value"])
             if km_to_service > 0:
-                return util.convert_metric_values(data["kmToService"]["value"])
+                return util.convert_metric_values(data["distanceToService"]["value"])
         return None
     elif sensor_id == "months_to_service":
-        return data["monthsToService"]["value"] if util.keys_exists(data, "monthsToService") else None
+        return data["timeToService"]["value"] if util.keys_exists(data, "timeToService") else None
     elif sensor_id == "service_warning_status":
-        return data["serviceWarningStatus"]["value"] if util.keys_exists(data, "serviceWarningStatus") else None
+        return data["serviceWarning"]["value"] if util.keys_exists(data, "serviceWarning") else None
     elif sensor_id == "service_warning_trigger":
-        return data["serviceWarningTrigger"]["value"] if util.keys_exists(data, "serviceWarningTrigger") else None
+        return data["serviceTrigger"]["value"] if util.keys_exists(data, "serviceTrigger") else None
     else:
         return None