diff --git a/libdyson/dyson_pure_cool.py b/libdyson/dyson_pure_cool.py
index 34c98c0..e637a1d 100644
--- a/libdyson/dyson_pure_cool.py
+++ b/libdyson/dyson_pure_cool.py
@@ -120,7 +120,9 @@ class DysonPureCool(DysonPureCoolBase):
     @property
     def oscillation(self) -> bool:
         """Return oscillation status."""
-        return self._get_field_value(self._status, "oson") == "OION"
+        # Seems some devices use OION/OIOF while others uses ON/OFF
+        # https://github.com/shenxn/ha-dyson/issues/22
+        return self._get_field_value(self._status, "oson") in ["OION", "ON"]
 
     @property
     def oscillation_angle_low(self) -> int:
@@ -152,8 +154,13 @@ def enable_oscillation(
                 "angle_high must be either equal to angle_low or at least 30 larger than angle_low"
             )
 
+        current_oscillation_raw = self._get_field_value(self._status, "oson")
+        if current_oscillation_raw in ["OION", "OIOF"]:
+            oson = "OION"
+        else:
+            oson = "ON"
         self._set_configuration(
-            oson="OION",
+            oson=oson,
             fpwr="ON",
             ancp="CUST",
             osal=f"{angle_low:04d}",
@@ -162,4 +169,9 @@ def enable_oscillation(
 
     def disable_oscillation(self) -> None:
         """Turn off oscillation."""
-        self._set_configuration(oson="OIOF")
+        current_oscillation_raw = self._get_field_value(self._status, "oson")
+        if current_oscillation_raw in ["OION", "OIOF"]:
+            oson = "OIOF"
+        else:
+            oson = "OFF"
+        self._set_configuration(oson=oson)
diff --git a/tests/test_fan_device.py b/tests/test_fan_device.py
index a94d5ca..cb4aead 100644
--- a/tests/test_fan_device.py
+++ b/tests/test_fan_device.py
@@ -1,6 +1,7 @@
 """Tests for DysonFanDevice."""
 
 import json
+from typing import Optional
 from unittest.mock import MagicMock
 
 import pytest
@@ -104,9 +105,12 @@ def assert_command(
     command: str,
     command_args: list,
     msg_data: dict,
+    new_status: Optional[dict] = None,
 ):
     """Test commands of fan device."""
     device.connect(HOST)
+    if new_status is not None:
+        mqtt_client.state_change(new_status)
     func = getattr(device, command)
     func(*command_args)
     assert len(mqtt_client.commands) == 1
diff --git a/tests/test_pure_cool.py b/tests/test_pure_cool.py
index 02024a7..f60e37d 100644
--- a/tests/test_pure_cool.py
+++ b/tests/test_pure_cool.py
@@ -120,6 +120,21 @@ def test_properties(mqtt_client: MockedMQTT):
     assert device.carbon_filter_life is None
     assert device.hepa_filter_life == 80
 
+    new_status = {
+        "product-state": {
+            "oson": ["ON", "OFF"],
+        },
+    }
+    mqtt_client.state_change(new_status)
+    assert device.oscillation is False
+    new_status = {
+        "product-state": {
+            "oson": ["OFF", "ON"],
+        },
+    }
+    mqtt_client.state_change(new_status)
+    assert device.oscillation is True
+
     mqtt_client._environmental_data = {
         "data": {
             "tact": "2977",
@@ -204,6 +219,39 @@ def test_command(
     )
 
 
+def test_oscillation_ON_OFF(mqtt_client: MockedMQTT):
+    """Test enable and disable oscillation with ON/OFF instead of OION/OIOFF."""
+    new_status = {
+        "product-state": {
+            "oson": ["OIOF", "ON"],
+            "osal": ["0063", "0063"],
+            "osau": ["0243", "0243"],
+        },
+    }
+    assert_command(
+        DysonPureCool(SERIAL, CREDENTIAL, DEVICE_TYPE),
+        mqtt_client,
+        "enable_oscillation",
+        [],
+        {
+            "oson": "ON",
+            "fpwr": "ON",
+            "ancp": "CUST",
+            "osal": "0063",
+            "osau": "0243",
+        },
+        new_status,
+    )
+    assert_command(
+        DysonPureCool(SERIAL, CREDENTIAL, DEVICE_TYPE),
+        mqtt_client,
+        "disable_oscillation",
+        [],
+        {"oson": "OFF"},
+        new_status,
+    )
+
+
 @pytest.mark.parametrize(
     "angle_low,angle_high",
     [