diff --git a/roborock/devices/device.py b/roborock/devices/device.py
index e58bac9d..d7908c74 100644
--- a/roborock/devices/device.py
+++ b/roborock/devices/device.py
@@ -33,7 +33,9 @@
 MIN_BACKOFF_INTERVAL = datetime.timedelta(seconds=10)
 MAX_BACKOFF_INTERVAL = datetime.timedelta(minutes=30)
 BACKOFF_MULTIPLIER = 1.5
-START_ATTEMPT_TIMEOUT = datetime.timedelta(seconds=5)
+# Give time for the NETWORK_INFO fetch and V1 hello attempt
+# and potential fallback to L01.
+START_ATTEMPT_TIMEOUT = datetime.timedelta(seconds=15)
 
 
 DeviceReadyCallback = Callable[["RoborockDevice"], None]
diff --git a/tests/e2e/__snapshots__/test_device_manager.ambr b/tests/e2e/__snapshots__/test_device_manager.ambr
index 5f0f70c6..ccea0922 100644
--- a/tests/e2e/__snapshots__/test_device_manager.ambr
+++ b/tests/e2e/__snapshots__/test_device_manager.ambr
@@ -1,5 +1,215 @@
 # serializer version: 1
-# name: test_device_manager
+# name: test_l01_device
+  [mqtt >]
+  00000000  10 29 00 04 4d 51 54 54 05 c2 00 3c 00 00 00 00  |.)..MQTT...<....|
+  00000010  08 31 39 36 34 38 66 39 34 00 10 32 33 34 36 37  |.19648f94..23467|
+  00000020  38 65 61 38 35 34 66 31 39 39 65                 |8ea854f199e|
+  [mqtt <]
+  00000000  20 09 02 00 06 22 00 0a 21 00 14                 | ...."..!..|
+  [mqtt >]
+  00000000  82 24 00 01 00 00 1e 72 72 2f 6d 2f 6f 2f 75 73  |.$.....rr/m/o/us|
+  00000010  65 72 31 32 33 2f 31 39 36 34 38 66 39 34 2f 61  |er123/19648f94/a|
+  00000020  62 63 31 32 33 00                                |bc123.|
+  [mqtt <]
+  00000000  90 04 00 01 00 00                                |......|
+  [mqtt >]
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+  00000390  4c ca 5e 4e e6 44 1b 1f e9 e0 7d 73 2e 72 ce 39  |L.^N.D....}s.r.9|
+  000003a0  e3 12 90 89 12 eb 93 34 1a 11 4f d1 98 33 c0 41  |.......4..O..3.A|
+  000003b0  f0 6b 5d 64 90 4a cc 5c f6 2f 46 a0 55 20 d7 36  |.k]d.J.\./F.U .6|
+  000003c0  0c 92 1a 85 68 aa 44 73 1d d0 7c c4 ba 31 33 a0  |....h.Ds..|..13.|
+  000003d0  43 00 0e b3 43 68 98 7b 3d f9 4f 7c e8 c4 30 9e  |C...Ch.{=.O|..0.|
+  000003e0  0c b8 c1 89 56 88 a1 1c 5b ff dd 92 2c ef bf 0e  |....V...[...,...|
+  000003f0  23 48 d2 bd 48 84 99 14 a7 e8 19 cc 50 5e 0a 05  |#H..H.......P^..|
+  00000400  90 1a e0 25 1a 4b 55 74 fe 59 36 47 e3 e5 79 fd  |...%.KUt.Y6G..y.|
+  00000410  a0 9b 5e 72 8d 3e 57 69 0b 7c 21 80 2f a4 d5 12  |..^r.>Wi.|!./...|
+  00000420  99 be 49 6e f3 0b 57 e5 a8 1e 88 b6 7b 48        |..In..W.....{H|
+# ---
+# name: test_v1_device
   [mqtt >]
   00000000  10 29 00 04 4d 51 54 54 05 c2 00 3c 00 00 00 00  |.)..MQTT...<....|
   00000010  08 31 39 36 34 38 66 39 34 00 10 32 33 34 36 37  |.19648f94..23467|
diff --git a/tests/e2e/test_device_manager.py b/tests/e2e/test_device_manager.py
index 6971df9b..083775e4 100644
--- a/tests/e2e/test_device_manager.py
+++ b/tests/e2e/test_device_manager.py
@@ -4,7 +4,7 @@
 mock out the lower level socket connections to simulate a broker which gets us
 close to an "end to end" test without needing an actual MQTT broker server.
 
-These are higher level tests that the similar tests in tests/mqtt/test_roborock_session.py
+These are higher level tests than the similar tests in tests/mqtt/test_roborock_session.py
 which use mocks to verify specific behaviors.
 """
 
@@ -16,6 +16,7 @@
 import pytest
 import syrupy
 
+from roborock.data.containers import UserData
 from roborock.devices.cache import Cache, InMemoryCache
 from roborock.devices.device_manager import DeviceManager, UserParams, create_device_manager
 from roborock.protocol import MessageParser
@@ -104,14 +105,10 @@ def __init__(self) -> None:
     def build(
         self,
         payload: bytes,
-        seq: int | None = None,
         protocol: RoborockMessageProtocol | None = None,
     ) -> bytes:
         """Build an encoded response message."""
-        if seq is not None:
-            self.seq_counter = seq
-        else:
-            self.seq_counter += 1
+        self.seq_counter += 1
         return MessageParser.build(
             RoborockMessage(
                 protocol=protocol if protocol is not None else self.protocol,
@@ -145,7 +142,7 @@ def build_rpc(
         )
 
 
-async def test_device_manager(
+async def test_v1_device(
     mock_rest: Any,
     push_mqtt_response: Callable[[bytes], None],
     local_response_queue: asyncio.Queue[bytes],
@@ -154,7 +151,7 @@ async def test_device_manager(
     snapshot: syrupy.SnapshotAssertion,
     device_manager_factory: Callable[[UserParams], Awaitable[DeviceManager]],
 ) -> None:
-    """Test the device manager end to end flow."""
+    """Test the device manager end to end flow with a v1 device."""
 
     # Simulate the login flow to get user params
     web_api = RoborockApiClient(username=TEST_USERNAME)
@@ -177,9 +174,10 @@ async def test_device_manager(
         push_mqtt_response(response)
 
     # Prepare local device responses. The ids are deterministic based on deterministic_message_fixtures
+    response_builder.seq_counter = 0
     local_responses: list[bytes] = [
         # Queue HELLO response
-        response_builder.build(protocol=RoborockMessageProtocol.HELLO_RESPONSE, seq=1, payload=b"ok"),
+        response_builder.build(protocol=RoborockMessageProtocol.HELLO_RESPONSE, payload=b"ok"),
         # Feature discovery part 1 & 2
         response_builder.build_rpc(data={"id": 9094, "result": [mock_data.APP_GET_INIT_STATUS]}),
         response_builder.build_rpc(data={"id": 9097, "result": [mock_data.STATUS]}),
@@ -231,8 +229,9 @@ async def test_device_manager(
         push_mqtt_response(response)
 
     # Prepare local device responses.
+    response_builder.seq_counter = 0
     local_response_queue.put_nowait(
-        response_builder.build(protocol=RoborockMessageProtocol.HELLO_RESPONSE, seq=1, payload=b"ok")
+        response_builder.build(protocol=RoborockMessageProtocol.HELLO_RESPONSE, payload=b"ok")
     )
 
     device_manager = await device_manager_factory(user_params)
@@ -268,3 +267,81 @@ async def test_device_manager(
     assert device.v1_properties.status.state_name == "charging"
 
     assert snapshot == log
+
+
+async def test_l01_device(
+    mock_rest: Any,
+    push_mqtt_response: Callable[[bytes], None],
+    local_response_queue: asyncio.Queue[bytes],
+    local_received_requests: asyncio.Queue[bytes],
+    log: CapturedRequestLog,
+    snapshot: syrupy.SnapshotAssertion,
+    device_manager_factory: Callable[[UserParams], Awaitable[DeviceManager]],
+) -> None:
+    """Test the device manager end to end flow with a l01 device."""
+    # Prepare MQTT requests
+    mqtt_response_builder = ResponseBuilder()
+    mqtt_responses: list[bytes] = [
+        # MQTT connection response
+        mqtt_packet.gen_connack(rc=0, flags=2),
+        # ACK the request to subscribe to the topic
+        mqtt_packet.gen_suback(mid=1),
+        # ACK the GET_NETWORK_INFO call. id is deterministic based on deterministic_message_fixtures
+        mqtt_packet.gen_publish(
+            TEST_TOPIC, mid=2, payload=mqtt_response_builder.build_rpc(data={"id": 9090, "result": NETWORK_INFO})
+        ),
+    ]
+    for response in mqtt_responses:
+        push_mqtt_response(response)
+
+    # Prepare local device responses. The ids are deterministic based on deterministic_message_fixtures
+    local_response_builder = ResponseBuilder()
+    local_response_builder.version = LocalProtocolVersion.L01
+    local_response_builder.connect_nonce = 9093
+    local_responses: list[bytes] = [
+        # Initial V01 Hello request will fail and cause a retry with L01
+        b"\x00",
+        # Queue HELLO response with L01
+        local_response_builder.build(protocol=RoborockMessageProtocol.HELLO_RESPONSE, payload=b"ok"),
+    ]
+    # Feature discovery requests are sent with an ack nonce based on the random sent in HELLO_RESPONSE
+    local_response_builder.ack_nonce = TEST_RANDOM
+    local_responses.extend(
+        [
+            local_response_builder.build_rpc(data={"id": 9094, "result": [mock_data.APP_GET_INIT_STATUS]}),
+            local_response_builder.build_rpc(data={"id": 9097, "result": [mock_data.STATUS]}),
+        ]
+    )
+    for payload in local_responses:
+        local_response_queue.put_nowait(payload)
+
+    # Create the device manager
+    user_params = UserParams(
+        username=TEST_USERNAME,
+        user_data=UserData.from_dict(mock_data.USER_DATA),
+        base_url=mock_data.BASE_URL,
+    )
+    device_manager = await device_manager_factory(user_params)
+
+    # The mocked Home Data API returns a single v1 device
+    devices = await device_manager.get_devices()
+    assert len(devices) == 1
+    device = devices[0]
+    assert device.duid == "abc123"
+    assert device.name == "Roborock S7 MaxV"
+    assert device.is_connected
+    assert device.is_local_connected
+
+    # Verify GET_STATUS response based on mock_data.STATUS
+    assert device.v1_properties
+    assert device.v1_properties.status
+    assert device.v1_properties.status.state_name == "charging"
+    assert device.v1_properties.status.battery == 100
+    assert device.v1_properties.status.clean_time == 1176
+
+    # Verify arbitrary device features
+    assert device.v1_properties.device_features.is_show_clean_finish_reason_supported
+    assert device.v1_properties.device_features.is_customized_clean_supported
+    assert not device.v1_properties.device_features.is_matter_supported
+
+    assert snapshot == log