diff --git a/.gitignore b/.gitignore
index b68bb3b..fbb1d23 100644
--- a/.gitignore
+++ b/.gitignore
@@ -152,3 +152,5 @@ cython_debug/
 #.idea/
 aes.py
 *.bak
+emu/PV_BLE_cover/PV_BLE_cover.ino
+img/
diff --git a/custom_components/hunterdouglas_powerview_ble/api.py b/custom_components/hunterdouglas_powerview_ble/api.py
index 3567b3c..4c1500e 100644
--- a/custom_components/hunterdouglas_powerview_ble/api.py
+++ b/custom_components/hunterdouglas_powerview_ble/api.py
@@ -12,6 +12,10 @@ from bleak.exc import BleakError
 from bleak.uuids import normalize_uuid_str
 from bleak_retry_connector import establish_connection
 from cryptography.hazmat.primitives.ciphers import Cipher, algorithms, modes
+from cryptography.hazmat.primitives.ciphers.base import (
+    AEADDecryptionContext,
+    AEADEncryptionContext,
+)
 from homeassistant.components.cover import ATTR_CURRENT_POSITION
 
 from .const import LOGGER, TIMEOUT
@@ -25,6 +29,7 @@ ATTR_ACTIVITY: Final[str] = "activity"
 
 
 SHADE_TYPE: Final[dict[int, str]] = {
+    # up down only
     1: "Designer Roller",
     4: "Roman",
     5: "Bottom Up",
@@ -38,6 +43,11 @@ SHADE_TYPE: Final[dict[int, str]] = {
     52: "Banded Shades",
     53: "Sonnette",
     84: "Vignette",
+    # top down bottom up
+    8: "Duette, Top Down Bottom Up",
+    9: "Duette DuoLite, Top Down Bottom Up",
+    33: "Duette Architella, Top Down Bottom Up",
+    47: "Pleated, Top Down Bottom Up",
 }
 
 OPEN_POSITION: Final[int] = 100
@@ -91,11 +101,11 @@ class PowerViewBLE:
             ],
         )
         self._data_event = asyncio.Event()
-        self._data: bytearray
+        self._data: bytearray = bytearray()
         self._info: PVDeviceInfo = PVDeviceInfo()
         self._cmd_lock: Final = asyncio.Lock()
-        self._cmd_next = None
-        self._cipher: Final = (
+        self._cmd_next: tuple[ShadeCmd, bytes]
+        self._cipher: Final[Cipher | None] = (
             Cipher(algorithms.AES(home_key), modes.CTR(bytearray(16)))
             if len(home_key) == 16
             else None
@@ -117,7 +127,7 @@ class PowerViewBLE:
 
     # general cmd: uint16_t cmd, uint8_t seqID, uint8_t data_len
     async def _cmd(
-        self, cmd: tuple[ShadeCmd, bytearray], disconnect: bool = True
+        self, cmd: tuple[ShadeCmd, bytes], disconnect: bool = True
     ) -> None:
         self._cmd_next = cmd
         if self._cmd_lock.locked():
@@ -127,16 +137,14 @@ class PowerViewBLE:
         async with self._cmd_lock:
             try:
                 await self._connect()
-                cmd_run = self._cmd_next
-                tx_data = (
-                    bytearray(
-                        int.to_bytes(cmd_run[0].value, 2, byteorder="little")
-                        + bytes([self._seqcnt, len(cmd_run[1])])
-                    )
+                cmd_run: tuple[ShadeCmd, bytes] = self._cmd_next
+                tx_data: bytes = bytes(
+                    int.to_bytes(cmd_run[0].value, 2, byteorder="little")
+                    + bytes([self._seqcnt, len(cmd_run[1])])
                     + cmd_run[1]
                 )
                 if self._cipher is not None:
-                    enc = self._cipher.encryptor()
+                    enc: AEADEncryptionContext = self._cipher.encryptor()
                     tx_data = enc.update(tx_data) + enc.finalize()
                 self._data_event.clear()
                 LOGGER.debug("sending cmd: %s", tx_data)
@@ -161,8 +169,8 @@ class PowerViewBLE:
         if len(data) != 9:
             LOGGER.debug("not a V2 record!")
             return []
-        pos = int.from_bytes(data[3:5], byteorder="little")
-        pos2 = (int(data[5]) << 4) + (int(data[4]) >> 4)
+        pos: int = int.from_bytes(data[3:5], byteorder="little")
+        pos2: int = (int(data[5]) << 4) + (int(data[4]) >> 4)
         return [
             (ATTR_CURRENT_POSITION, ((pos >> 2) / 10)),
             ("position2", pos2 >> 2),
@@ -185,7 +193,7 @@ class PowerViewBLE:
         await self._cmd(
             (
                 ShadeCmd.SET_POSITION,
-                bytearray(
+                bytes(
                     int.to_bytes(value * 100, 2, byteorder="little")
                     + bytes([0x00, 0x80, 0x00, 0x80, 0x00, 0x80, 0x0])
                 ),
@@ -201,7 +209,7 @@ class PowerViewBLE:
     async def stop(self) -> None:
         """Stop device movement."""
         LOGGER.debug("%s stop", self.name)
-        await self._cmd((ShadeCmd.STOP, bytearray(b"")))
+        await self._cmd((ShadeCmd.STOP, b""))
 
     async def close(self) -> None:
         """Fully close cover."""
@@ -217,7 +225,7 @@ class PowerViewBLE:
         await self._cmd(
             (
                 ShadeCmd.ACTIVATE_SCENE,
-                bytearray(int.to_bytes(idx, 1, byteorder="little") + bytes([0xA2])),
+                int.to_bytes(idx, 1, byteorder="little") + bytes([0xA2]),
             ),
         )
 
@@ -225,7 +233,7 @@ class PowerViewBLE:
         """Verify shade response data."""
         data: bytearray = din
         if self._cipher is not None:
-            dec = self._cipher.decryptor()
+            dec: AEADDecryptionContext = self._cipher.decryptor()
             data = bytearray(dec.update(din) + dec.finalize())
         if len(data) < 4:
             LOGGER.error("Reponse message too short")