diff --git a/roborock/testing/v1_simulator.py b/roborock/testing/v1_simulator.py
index 8dfd36091..3e6b6e43b 100644
--- a/roborock/testing/v1_simulator.py
+++ b/roborock/testing/v1_simulator.py
@@ -4,8 +4,11 @@
 machine and JSON RPC commands for V1 vacuum cleaners.
 """
 
+import gzip
+import hashlib
 import json
 import logging
+import struct
 import time
 from collections.abc import Callable
 from dataclasses import asdict, replace
@@ -37,6 +40,7 @@
 )
 from roborock.devices.cache import DeviceCache, InMemoryCache
 from roborock.devices.rpc.v1_channel import V1Channel
+from roborock.protocol import Utils
 from roborock.protocols.v1_protocol import SecurityData
 from roborock.roborock_message import RoborockDataProtocol, RoborockMessage, RoborockMessageProtocol
 from roborock.testing.channel import FakeChannel
@@ -165,6 +169,33 @@ def _serialize_dataclass(obj: Any) -> dict[str, Any]:
 )
 
 
+# Eight character endpoint, matching the width of the map response header field.
+MAP_ENDPOINT = "fakeendp"
+
+# Minimum side length in cells of the simulated map image.
+MAP_IMAGE_SIZE = 32
+
+_MAP_FILE_HEADER_LEN = 20
+_MAP_CELL_SIZE_MM = 50
+_MAP_IMAGE_PADDING = 2
+_IMAGE_BLOCK_TYPE = 2
+_PATH_BLOCK_TYPE = 3
+_POSE_BLOCK_TYPE = 8
+_MOP_BLOCK_TYPE = 18
+_DIGEST_BLOCK_TYPE = 1024
+_MAP_INSIDE = 0xFF
+
+
+def _path_point(index: int) -> bytes:
+    """A deterministic path point, so tests can assert on exact bytes."""
+    return struct.pack("<HH", 20000 + index * 10, 21000 + index * 7)
+
+
+def _block(block_type: int, payload: bytes, extra_header: bytes = b"") -> bytes:
+    """Frame one map block: type, header length, payload length, header, payload."""
+    return struct.pack("<HHI", block_type, 8 + len(extra_header), len(payload)) + extra_header + payload
+
+
 class V1VacuumSimulator(RoborockDeviceSimulator):
     """Firmware simulator for a V1/L01 vacuum device.
 
@@ -219,10 +250,18 @@ def __init__(
             "reset_consumable": self._handle_reset_consumable,
             "app_get_init_status": self._handle_app_get_init_status,
             "get_network_info": self._handle_get_network_info,
+            "get_map_v1": lambda params: self.build_map_bytes(),
         }
 
+        # The simulated robot's own view of its map. Tests extend the path
+        # with advance_path() and move the robot via robot_position.
+        self.path_length = 0
+        self.robot_position = (25000, 24000, 90)
+
         self.device_cache = DeviceCache(self.duid, InMemoryCache())
-        self.security_data = SecurityData(endpoint="fake_endpoint", nonce=b"fake_nonce_16bytes")
+        # The endpoint must fit the eight byte map response header field and the
+        # nonce must be a valid sixteen byte AES key for map responses to decode.
+        self.security_data = SecurityData(endpoint=MAP_ENDPOINT, nonce=b"fake_nonce_16byt")
         local_session = Mock(return_value=self.local_channel)
 
         self._v1_channel = V1Channel(
@@ -333,6 +372,56 @@ def _handle_app_get_init_status(self, params: Any) -> list[dict[str, Any]]:
     def _handle_get_network_info(self, params: Any) -> dict[str, Any]:
         return _serialize_dataclass(self.network_info)
 
+    # --- Simulated map -------------------------------------------------
+
+    def advance_path(self, count: int) -> None:
+        """Extend the current path, as the robot does while it cleans."""
+        self.path_length += count
+
+    def path_payload(self, start: int, count: int) -> bytes:
+        """The point records for a range of the current path."""
+        return b"".join(_path_point(i) for i in range(start, start + count))
+
+    def mop_payload(self, start: int, count: int) -> bytes:
+        """The mop flags for a range of the current path, alternating per point."""
+        return bytes(i % 2 for i in range(start, start + count))
+
+    def _pose_block(self) -> bytes:
+        return _block(_POSE_BLOCK_TYPE, struct.pack("<iii", *self.robot_position))
+
+    def _path_blocks(self, start: int, count: int) -> bytes:
+        """Blocks 3 and 18 for a range of the path, as both a map and a page carry them."""
+        return _block(_PATH_BLOCK_TYPE, self.path_payload(start, count), struct.pack("<III", count, 4, 0)) + _block(
+            _MOP_BLOCK_TYPE, self.mop_payload(start, count)
+        )
+
+    def build_map_bytes(self) -> bytes:
+        """Build a decompressed map file reflecting the current robot state."""
+        # Full-map image offsets are cells; path and robot coordinates are millimetres.
+        points = [self.robot_position[:2], *struct.iter_unpack("<HH", self.path_payload(0, self.path_length))]
+        xs = [x // _MAP_CELL_SIZE_MM for x, _ in points]
+        ys = [y // _MAP_CELL_SIZE_MM for _, y in points]
+        left = max(0, min(xs) - _MAP_IMAGE_PADDING)
+        top = max(0, min(ys) - _MAP_IMAGE_PADDING)
+        width = max(MAP_IMAGE_SIZE, max(xs) - left + _MAP_IMAGE_PADDING + 1)
+        height = max(MAP_IMAGE_SIZE, max(ys) - top + _MAP_IMAGE_PADDING + 1)
+        image = _block(
+            _IMAGE_BLOCK_TYPE,
+            bytes([_MAP_INSIDE]) * (width * height),
+            struct.pack("<Iiiii", 0, top, left, height, width),
+        )
+        body = image + self._path_blocks(0, self.path_length) + self._pose_block()
+        digest_header = struct.pack("<HHI", _DIGEST_BLOCK_TYPE, 8, 20)
+        header = struct.pack("<2sHIHHII", b"rr", _MAP_FILE_HEADER_LEN, len(body) + len(digest_header) + 20, 1, 0, 0, 0)
+        data = header + body + digest_header
+        return data + hashlib.sha1(data, usedforsecurity=False).digest()
+
+    def _map_response_message(self, request_id: int, map_bytes: bytes) -> RoborockMessage:
+        """Frame the map as the encrypted binary response the device sends."""
+        body = Utils.encrypt_cbc(gzip.compress(map_bytes), self.security_data.nonce)
+        header = struct.pack("<8s8sH6s", self.security_data.endpoint.encode(), bytes(8), request_id & 0xFFFF, bytes(6))
+        return RoborockMessage(protocol=RoborockMessageProtocol.MAP_RESPONSE, payload=header + body)
+
     async def _handle_publish(self, message: RoborockMessage, channel: FakeChannel) -> None:
         if not message.payload:
             return
@@ -364,6 +453,11 @@ async def _handle_publish(self, message: RoborockMessage, channel: FakeChannel)
         else:
             result = "ok"
 
+        if method == "get_map_v1" and error is None and isinstance(result, bytes):
+            # Custom handlers return decompressed map bytes, just like the default.
+            channel.notify_subscribers(self._map_response_message(msg_id, result))
+            return
+
         response_data = {
             "dps": {"102": json.dumps({"id": msg_id, "result": result, "error": error})},
             "t": int(time.time()),
diff --git a/tests/testing/test_v1_simulator.py b/tests/testing/test_v1_simulator.py
index 8883047c6..fa5f011e9 100644
--- a/tests/testing/test_v1_simulator.py
+++ b/tests/testing/test_v1_simulator.py
@@ -1,6 +1,9 @@
+import hashlib
+import struct
 from dataclasses import replace
 
 import pytest
+from vacuum_map_parser_base.config.drawable import Drawable
 
 from roborock.data import UserData
 from roborock.data.v1 import RoborockStateCode
@@ -9,6 +12,7 @@
 from roborock.devices.device_manager import UserParams, create_device_manager
 from roborock.devices.traits.v1.consumeable import ConsumableAttribute
 from roborock.exceptions import RoborockException
+from roborock.map.map_parser import MapParser, MapParserConfig
 from roborock.testing import (
     DEFAULT_NETWORK_INFO,
     DEFAULT_STATUS,
@@ -274,3 +278,104 @@ async def test_multiple_devices_network_info_override():
     await device2.v1_properties.network_info.refresh()
     assert device2.v1_properties.network_info.ip == "192.168.1.50"
     assert device2.v1_properties.network_info.ssid == "custom_wifi"
+
+
+# --- Map content ---------------------------------------------------------------
+
+
+def _path_points(device) -> list[tuple[float, float]]:
+    """The rendered path, as the map card would receive it."""
+    map_data = device.v1_properties.map_content.map_data
+    assert map_data is not None and map_data.path is not None
+    return [(point.x, point.y) for point in map_data.path.path[0]]
+
+
+async def test_full_map_refresh_from_simulator():
+    """The simulated map decodes through the real map channel and parser."""
+    cloud = FakeRoborockCloud()
+    simulator = V1VacuumSimulator(duid="s7_map")
+    simulator.advance_path(40)
+    simulator.robot_position = (31000, 32000, 180)
+    device = await _create_connected_device(cloud, simulator)
+
+    await device.v1_properties.map_content.refresh()
+
+    map_content = device.v1_properties.map_content
+    assert map_content.image_content is not None
+    assert map_content.image_content.startswith(b"\x89PNG")
+    assert len(_path_points(device)) == 40
+    assert map_content.map_data is not None and map_content.map_data.vacuum_position is not None
+    assert (map_content.map_data.vacuum_position.x, map_content.map_data.vacuum_position.y) == (31000, 32000)
+
+
+@pytest.mark.parametrize("count", [0, 40, 400])
+def test_simulated_map_length_and_digest(count: int) -> None:
+    """Synthetic maps satisfy the app's full-file length and SHA-1 checks."""
+    simulator = V1VacuumSimulator()
+    simulator.advance_path(count)
+    raw = simulator.build_map_bytes()
+    magic, header_length, payload_length, major, minor = struct.unpack_from("<2sHIHH", raw)
+    assert magic == b"rr"
+    assert (major, minor) == (1, 0)
+    assert header_length + payload_length == len(raw)
+    assert struct.unpack_from("<HHI", raw, len(raw) - 28) == (1024, 8, 20)
+    assert raw[-20:] == hashlib.sha1(raw[:-20], usedforsecurity=False).digest()
+
+
+@pytest.mark.parametrize("position", [(25000, 24000, 90), (31000, 32000, 180), (0, 0, 0)])
+@pytest.mark.parametrize("count", [0, 40, 400])
+def test_simulated_map_contains_robot_and_path(position: tuple[int, int, int], count: int) -> None:
+    """Map geometry keeps all simulated overlays inside the rendered image."""
+    simulator = V1VacuumSimulator()
+    simulator.robot_position = position
+    simulator.advance_path(count)
+    parsed = MapParser(MapParserConfig()).parse(simulator.build_map_bytes())
+    assert parsed is not None and parsed.map_data is not None
+    data = parsed.map_data
+    assert data.image is not None and data.vacuum_position is not None and data.path is not None
+    width, height = data.image.data.size
+    for point in [data.vacuum_position, *data.path.path[0]]:
+        pixel = point.to_img(data.image.dimensions)
+        assert 0 <= pixel.x < width
+        assert 0 <= pixel.y < height
+
+
+@pytest.mark.parametrize("drawable", [Drawable.PATH, Drawable.VACUUM_POSITION])
+def test_simulated_map_renders_overlays(drawable: Drawable) -> None:
+    """Each overlay changes the image rather than silently being clipped away."""
+    simulator = V1VacuumSimulator()
+    simulator.advance_path(40)
+    raw = simulator.build_map_bytes()
+    background = MapParser(MapParserConfig(drawables=[])).parse(raw)
+    rendered = MapParser(MapParserConfig(drawables=[drawable])).parse(raw)
+    assert background is not None and rendered is not None
+    assert rendered.image_content != background.image_content
+
+
+async def test_map_custom_handler_override() -> None:
+    """A custom map travels through the same binary response path as the default."""
+    custom_simulator = V1VacuumSimulator()
+    custom_simulator.advance_path(7)
+    custom_simulator.robot_position = (31000, 32000, 180)
+    custom_map = custom_simulator.build_map_bytes()
+
+    def get_map(params):
+        assert params == []
+        return custom_map
+
+    simulator = V1VacuumSimulator(custom_handlers={"get_map_v1": get_map})
+    device = await _create_connected_device(FakeRoborockCloud(), simulator)
+    await device.v1_properties.map_content.refresh()
+    assert device.v1_properties.map_content.raw_api_response == custom_map
+    assert len(_path_points(device)) == 7
+
+
+async def test_map_custom_handler_error() -> None:
+    """A failing override emits an RPC error instead of a successful default map."""
+
+    def get_map(params):
+        raise RoborockException("map unavailable")
+
+    simulator = V1VacuumSimulator(custom_handlers={"get_map_v1": get_map})
+    with pytest.raises(RoborockException, match="map unavailable"):
+        await simulator.v1_channel.mqtt_rpc_channel.send_command("get_map_v1")