Review changes comment fix. Classes/Subclass/dataclass. Enum constants.
Naming conventions
diff --git a/bumble/hid.py b/bumble/hid.py
index 8c18b2a..6010258 100644
--- a/bumble/hid.py
+++ b/bumble/hid.py
@@ -40,123 +40,104 @@
 # Constants
 # -----------------------------------------------------------------------------
 # fmt: off
-
-
+HID_CONTROL_PSM            = 0x0011
+HID_INTERRUPT_PSM          = 0x0013
 
 
 class Message():
-    class HIDPsm(enum.IntEnum):
-        HID_CONTROL_PSM            = 0x0011
-        HID_INTERRUPT_PSM          = 0x0013
 
     # Report types
     class ReportType(enum.IntEnum):
-        HID_OTHER_REPORT        = 0x00
-        HID_INPUT_REPORT        = 0x01
-        HID_OUTPUT_REPORT       = 0x02
-        HID_FEATURE_REPORT      = 0x03
+        OTHER_REPORT        = 0x00
+        INPUT_REPORT        = 0x01
+        OUTPUT_REPORT       = 0x02
+        FEATURE_REPORT      = 0x03
 
     # Handshake parameters
-    class HandshakeState(enum.IntEnum):
-        HANDSHAKE_SUCCESSFUL              = 0x00
-        HANDSHAKE_NOT_READY               = 0x01
-        HANDSHAKE_ERR_INVALID_REPORT_ID   = 0x02
-        HANDSHAKE_ERR_UNSUPPORTED_REQUEST = 0x03
-        HANDSHAKE_ERR_UNKNOWN             = 0x0E
-        HANDSHAKE_ERR_FATAL               = 0x0F
+    class Handshake(enum.IntEnum):
+        SUCCESSFUL              = 0x00
+        NOT_READY               = 0x01
+        ERR_INVALID_REPORT_ID   = 0x02
+        ERR_UNSUPPORTED_REQUEST = 0x03
+        ERR_UNKNOWN             = 0x0E
+        ERR_FATAL               = 0x0F
 
-    class Type(enum.IntEnum):
-        HID_HANDSHAKE           = 0x00
-        HID_CONTROL             = 0x01
-        HID_GET_REPORT          = 0x04
-        HID_SET_REPORT          = 0x05
-        HID_GET_PROTOCOL        = 0x06
-        HID_SET_PROTOCOL        = 0x07
-        HID_DATA                = 0x0A
+    #Message Type
+    class MessageType(enum.IntEnum):
+        HANDSHAKE           = 0x00
+        CONTROL             = 0x01
+        GET_REPORT          = 0x04
+        SET_REPORT          = 0x05
+        GET_PROTOCOL        = 0x06
+        SET_PROTOCOL        = 0x07
+        DATA                = 0x0A
 
     # Protocol modes
     class ProtocolMode(enum.IntEnum):
-        HID_BOOT_PROTOCOL_MODE      = 0x00
-        HID_REPORT_PROTOCOL_MODE    = 0x01
+        BOOT_PROTOCOL      = 0x00
+        REPORT_PROTOCOL    = 0x01
 
     # Control Operations
     class ControlCommand(enum.IntEnum):
-        HID_SUSPEND              = 0x03
-        HID_EXIT_SUSPEND         = 0x04
-        HID_VIRTUAL_CABLE_UNPLUG = 0x05
+        SUSPEND              = 0x03
+        EXIT_SUSPEND         = 0x04
+        VIRTUAL_CABLE_UNPLUG = 0x05
 
 
-    # HIDP message types
+# HIDP messages
 @dataclass
 class GetReportMessage(Message):
     report_type : int
     report_id : int
     buffer_size : int
-    '''
-    def __init__(self,
-                 report_type: Optional[int] = None,
-                 report_id: Optional[int] = None,
-                 buffer_size: Optional[int] = None,
-                  ):
-        self.report_type = report_type
-        self.report_id = report_id
-        self.buffer_size = buffer_size
-    '''
+
     def __bytes__(self) -> bytes:
-        if(self.report_type == Message.ReportType.HID_OTHER_REPORT):
+        if(self.report_type == Message.ReportType.OTHER_REPORT):
             param = self.report_type
         else:
             param = 0x08 | self.report_type
-        header = ((Message.Type.HID_GET_REPORT << 4) | param)
+        header = ((Message.MessageType.GET_REPORT << 4) | param)
         packet_bytes = bytearray()
         packet_bytes.append(header)
         packet_bytes.append(self.report_id)
         packet_bytes.extend([(self.buffer_size & 0xff), ((self.buffer_size >> 8) & 0xff)])
         return bytes(packet_bytes)
-
+@dataclass
 class SetReportMessage(Message):
-
-    def __init__(self,
-                 report_type: int,
-                 data : bytes):
-            self.report_type = report_type
-            self.data = data
+    report_type: int
+    data : bytes
 
     def __bytes__(self) -> bytes:
-        header = ((Message.Type.HID_SET_REPORT << 4) | self.report_type)
+        header = ((Message.MessageType.SET_REPORT << 4) | self.report_type)
         packet_bytes = bytearray()
         packet_bytes.append(header)
         packet_bytes.extend(self.data)
         return bytes(packet_bytes)
-
+@dataclass
 class GetProtocolMessage(Message):
 
-
     def __bytes__(self) -> bytes:
-        header = (Message.Type.HID_GET_PROTOCOL << 4)
+        header = (Message.MessageType.GET_PROTOCOL << 4)
         packet_bytes = bytearray()
         packet_bytes.append(header)
         return bytes(packet_bytes)
-
+@dataclass
 class SetProtocolMessage(Message):
-
-    def __init__(self, protocol_mode: int):
-            self.protocol_mode = protocol_mode
-
+    protocol_mode: int
 
     def __bytes__(self) -> bytes:
-        header = (Message.Type.HID_SET_PROTOCOL << 4 | self.protocol_mode)
+        header = (Message.MessageType.SET_PROTOCOL << 4 | self.protocol_mode)
         packet_bytes = bytearray()
         packet_bytes.append(header)
         packet_bytes.append(self.protocol_mode)
         return bytes(packet_bytes)
-
+@dataclass
 class SendData(Message):
-    def __init__(self, data : bytes):
-            self.data = data
+
+    data : bytes
 
     def __bytes__(self) -> bytes:
-        header = ((Message.Type.HID_DATA << 4) | Message.ReportType.HID_OUTPUT_REPORT)
+        header = ((Message.MessageType.DATA << 4) | Message.ReportType.OUTPUT_REPORT)
         packet_bytes = bytearray()
         packet_bytes.append(header)
         packet_bytes.extend(self.data)
@@ -173,14 +154,14 @@
         self.l2cap_intr_channel = None
 
         # Register ourselves with the L2CAP channel manager
-        device.register_l2cap_server(Message.HIDPsm.HID_CONTROL_PSM, self.on_connection)
-        device.register_l2cap_server(Message.HIDPsm.HID_INTERRUPT_PSM, self.on_connection)
+        device.register_l2cap_server(HID_CONTROL_PSM, self.on_connection)
+        device.register_l2cap_server(HID_INTERRUPT_PSM, self.on_connection)
 
     async def connect_control_channel(self) -> None:
         # Create a new L2CAP connection - control channel
         try:
             self.l2cap_ctrl_channel = await self.device.l2cap_channel_manager.connect(
-                self.connection, Message.HIDPsm.HID_CONTROL_PSM
+                self.connection, HID_CONTROL_PSM
             )
         except ProtocolError as error:
             logging.exception(f'L2CAP connection failed: {error}')
@@ -194,7 +175,7 @@
         # Create a new L2CAP connection - interrupt channel
         try:
             self.l2cap_intr_channel = await self.device.l2cap_channel_manager.connect(
-                self.connection, Message.HIDPsm.HID_INTERRUPT_PSM
+                self.connection, HID_INTERRUPT_PSM
             )
         except ProtocolError as error:
             logging.exception(f'L2CAP connection failed: {error}')
@@ -207,7 +188,6 @@
     async def disconnect_interrupt_channel(self) -> None:
         if self.l2cap_intr_channel is None:
             raise InvalidStateError('invalid state')
-        await self.l2cap_intr_channel.disconnect()  # type: ignore
         channel = self.l2cap_intr_channel
         self.l2cap_intr_channel = None
         await channel.disconnect()  # type: ignore
@@ -215,7 +195,6 @@
     async def disconnect_control_channel(self) -> None:
         if self.l2cap_ctrl_channel is None:
             raise InvalidStateError('invalid state')
-        await self.l2cap_ctrl_channel.disconnect()  # type: ignore
         channel = self.l2cap_ctrl_channel
         self.l2cap_ctrl_channel = None
         await channel.disconnect()  # type: ignore
@@ -225,7 +204,7 @@
         l2cap_channel.on('open', lambda: self.on_l2cap_channel_open(l2cap_channel))
 
     def on_l2cap_channel_open(self, l2cap_channel: l2cap.Channel) -> None:
-        if l2cap_channel.psm == Message.HIDPsm.HID_CONTROL_PSM:
+        if l2cap_channel.psm == HID_CONTROL_PSM:
             self.l2cap_ctrl_channel = l2cap_channel
             self.l2cap_ctrl_channel.sink = self.on_ctrl_pdu
         else:
@@ -239,27 +218,20 @@
         message_type = pdu[0] >> 4
         param = pdu[0] & 0x0f
 
-        for command in Message.ControlCommand.__members__items():
-            if param == command:
-                logger.debug(f'<<< ', command + pdu)
-                self.handle_handshake(param)
-                self.emit(command, pdu)
-        '''
-        if message_type == Message.Type.HID_HANDSHAKE :
-            logger.debug('<<< HID HANDSHAKE')
-            self.handle_handshake(param)
-            self.emit('handshake', pdu)
-        elif message_type == Message.Type.HID_DATA :
+        if message_type == Message.MessageType.HANDSHAKE :
+            logger.debug(f'<<< HID HANDSHAKE: {Message.Handshake(param).name}')
+            self.emit('handshake', Message.Handshake(param))
+        elif message_type == Message.MessageType.DATA :
             logger.debug('<<< HID CONTROL DATA')
             self.emit('data', pdu)
-        elif message_type == Message.Type.HID_CONTROL :
-            if param == Message.ControlCommand.HID_SUSPEND :
+        elif message_type == Message.MessageType.CONTROL :
+            if param == Message.ControlCommand.SUSPEND :
                 logger.debug('<<< HID SUSPEND')
                 self.emit('suspend', pdu)
-            elif param == HID_EXIT_SUSPEND :
+            elif param == Message.ControlCommand.EXIT_SUSPEND :
                 logger.debug('<<< HID EXIT SUSPEND')
                 self.emit('exit_suspend', pdu)
-            elif param == HID_VIRTUAL_CABLE_UNPLUG :
+            elif param == Message.ControlCommand.VIRTUAL_CABLE_UNPLUG :
                 logger.debug('<<< HID VIRTUAL CABLE UNPLUG')
                 self.emit('virtual_cable_unplug')
             else:
@@ -267,7 +239,7 @@
         else:
             logger.debug('<<< HID CONTROL DATA')
             self.emit('data', pdu)
-        '''
+
 
     def on_intr_pdu(self, pdu: bytes) -> None:
         logger.debug(f'<<< HID INTERRUPT PDU: {pdu.hex()}')
@@ -304,46 +276,26 @@
         self.l2cap_intr_channel.send_pdu(msg)  # type: ignore
 
     def send_data(self, data):
-        msg = Message(data= data)
+        msg = SendData(data)
         hid_message = msg.__bytes__()
         logger.debug(f'>>> HID INTERRUPT SEND DATA, PDU: {hid_message.hex()}')
         self.send_pdu_on_intr(hid_message)  # type: ignore
 
     def suspend(self):
-        header = (Message.Type.HID_CONTROL << 4 | Message.ControlCommand.HID_SUSPEND)
+        header = (Message.MessageType.CONTROL << 4 | Message.ControlCommand.SUSPEND)
         msg = bytearray([header])
         logger.debug(f'>>> HID CONTROL SUSPEND, PDU:{msg.hex()}')
         self.l2cap_ctrl_channel.send_pdu(msg)  # type: ignore
 
     def exit_suspend(self):
-        header = (Message.Type.HID_CONTROL << 4 | Message.ControlCommand.HID_EXIT_SUSPEND)
+        header = (Message.MessageType.CONTROL << 4 | Message.ControlCommand.EXIT_SUSPEND)
         msg = bytearray([header])
         logger.debug(f'>>> HID CONTROL EXIT SUSPEND, PDU:{msg.hex()}')
         self.l2cap_ctrl_channel.send_pdu(msg)  # type: ignore
 
     def virtual_cable_unplug(self):
-        header = (Message.Type.HID_CONTROL << 4 | Message.ControlCommand.HID_VIRTUAL_CABLE_UNPLUG)
+        header = (Message.MessageType.CONTROL << 4 | Message.ControlCommand.VIRTUAL_CABLE_UNPLUG)
         msg = bytearray([header])
         logger.debug(f'>>> HID CONTROL VIRTUAL CABLE UNPLUG, PDU: {msg.hex()}')
         self.l2cap_ctrl_channel.send_pdu(msg)  # type: ignore
 
-    def handle_handshake(self, param: Message.HandshakeState):
-        for state in Message.HandshakeState.__members__items():
-            if param == state:
-                logger.debug(f'<<< HID HANDSHAKE: ', state)
-        '''
-        if param == HANDSHAKE_SUCCESSFUL :
-            logger.debug(f'<<< HID HANDSHAKE: SUCCESSFUL')
-        elif param == HANDSHAKE_NOT_READY :
-            logger.warning(f'<<< HID HANDSHAKE: NOT_READY')
-        elif param == HANDSHAKE_ERR_INVALID_REPORT_ID :
-            logger.warning(f'<<< HID HANDSHAKE: ERR_INVALID_REPORT_ID')
-        elif param == HANDSHAKE_ERR_UNSUPPORTED_REQUEST :
-            logger.warning(f'<<< HID HANDSHAKE: ERR_UNSUPPORTED_REQUEST')
-        elif param == HANDSHAKE_ERR_UNKNOWN :
-            logger.warning(f'<<< HID HANDSHAKE: ERR_UNKNOWN')
-        elif param == HANDSHAKE_ERR_FATAL :
-            logger.warning(f'<<< HID HANDSHAKE: ERR_FATAL')
-        else: # 0x5-0xD = Reserved
-            logger.warning("<<< HID HANDSHAKE: RESERVED VALUE")
-        '''
\ No newline at end of file
diff --git a/bumble/sdp.py b/bumble/sdp.py
index 389cd55..bcd12cf 100644
--- a/bumble/sdp.py
+++ b/bumble/sdp.py
@@ -167,7 +167,7 @@
         UUID: lambda x: DataElement(
             DataElement.UUID, core.UUID.from_bytes(bytes(reversed(x)))
         ),
-        TEXT_STRING: lambda x: DataElement(DataElement.TEXT_STRING, x.decode('latin1')),
+        TEXT_STRING: lambda x: DataElement(DataElement.TEXT_STRING, x),
         BOOLEAN: lambda x: DataElement(DataElement.BOOLEAN, x[0] == 1),
         SEQUENCE: lambda x: DataElement(
             DataElement.SEQUENCE, DataElement.list_from_bytes(x)
@@ -376,8 +376,6 @@
                 raise ValueError('invalid value_size')
         elif self.type == DataElement.UUID:
             data = bytes(reversed(bytes(self.value)))
-        elif self.type == DataElement.TEXT_STRING:
-            data = self.value.encode('latin1')
         elif self.type == DataElement.URL:
             data = self.value.encode('utf8')
         elif self.type == DataElement.BOOLEAN:
diff --git a/examples/run_hid_host.py b/examples/run_hid_host.py
index efb9768..17fbfaa 100644
--- a/examples/run_hid_host.py
+++ b/examples/run_hid_host.py
@@ -169,7 +169,7 @@
 
             elif  attribute.id == SDP_HID_DESCRIPTOR_LIST_ATTRIBUTE_ID :
                 print(color('  HID Report Descriptor type: ', 'cyan'), hex(attribute.value.value[0].value[0].value))
-                print(color('  HID Report DescriptorList: ', 'cyan'), (attribute.value.value[0].value[1].value).encode('latin-1'))                
+                print(color('  HID Report DescriptorList: ', 'cyan'), attribute.value.value[0].value[1].value)
                 HID_Descriptor_Type = attribute.value.value[0].value[0].value
                 HID_Report_Descriptor_List = attribute.value.value[0].value[1].value
 
@@ -243,13 +243,13 @@
         report_length = len(pdu[1:])
         report_id = pdu[1]
 
-        if (report_type != Message.ReportType.HID_OTHER_REPORT):
+        if (report_type != Message.ReportType.OTHER_REPORT):
             print(color(f' Report type = {report_type}, Report length = {report_length}, Report id = {report_id}', 'blue', None, 'bold'))
 
         if ((report_length <= 1) or (report_id == 0)):
             return
 
-        if report_type == Message.ReportType.HID_INPUT_REPORT:
+        if report_type == Message.ReportType.INPUT_REPORT:
             ReportParser.parse_input_report(pdu[1:])  #type: ignore
 
     async def handle_virtual_cable_unplug():
@@ -383,10 +383,10 @@
                     choice1 = choice1.decode('utf-8').strip()
 
                     if choice1 == '0':
-                        hid_host.set_protocol(Message.ProtocolMode.HID_BOOT_PROTOCOL_MODE)
+                        hid_host.set_protocol(Message.ProtocolMode.BOOT_PROTOCOL)
 
                     elif choice1 == '1':
-                        hid_host.set_protocol(Message.ProtocolMode.HID_REPORT_PROTOCOL_MODE)
+                        hid_host.set_protocol(Message.ProtocolMode.REPORT_PROTOCOL)
 
                     else:
                         print('Incorrect option selected')
diff --git a/tests/sdp_test.py b/tests/sdp_test.py
index d649138..29db875 100644
--- a/tests/sdp_test.py
+++ b/tests/sdp_test.py
@@ -100,13 +100,13 @@
     e = DataElement(DataElement.UUID, UUID('61A3512C-09BE-4DDC-A6A6-0B03667AAFC6'))
     basic_check(e)
 
-    e = DataElement(DataElement.TEXT_STRING, 'hello')
+    e = DataElement(DataElement.TEXT_STRING, b'hello')
     basic_check(e)
 
-    e = DataElement(DataElement.TEXT_STRING, 'hello' * 60)
+    e = DataElement(DataElement.TEXT_STRING, b'hello' * 60)
     basic_check(e)
 
-    e = DataElement(DataElement.TEXT_STRING, 'hello' * 20000)
+    e = DataElement(DataElement.TEXT_STRING, b'hello' * 20000)
     basic_check(e)
 
     e = DataElement(DataElement.BOOLEAN, True)
@@ -122,7 +122,7 @@
         DataElement.SEQUENCE,
         [
             DataElement(DataElement.BOOLEAN, True),
-            DataElement(DataElement.TEXT_STRING, 'hello'),
+            DataElement(DataElement.TEXT_STRING, b'hello'),
         ],
     )
     basic_check(e)
@@ -134,7 +134,7 @@
         DataElement.ALTERNATIVE,
         [
             DataElement(DataElement.BOOLEAN, True),
-            DataElement(DataElement.TEXT_STRING, 'hello'),
+            DataElement(DataElement.TEXT_STRING, b'hello'),
         ],
     )
     basic_check(e)
@@ -152,19 +152,19 @@
     e = DataElement.uuid(UUID.from_16_bits(1234))
     basic_check(e)
 
-    e = DataElement.text_string('hello')
+    e = DataElement.text_string(b'hello')
     basic_check(e)
 
     e = DataElement.boolean(True)
     basic_check(e)
 
     e = DataElement.sequence(
-        [DataElement.signed_integer(0, 1), DataElement.text_string('hello')]
+        [DataElement.signed_integer(0, 1), DataElement.text_string(b'hello')]
     )
     basic_check(e)
 
     e = DataElement.alternative(
-        [DataElement.signed_integer(0, 1), DataElement.text_string('hello')]
+        [DataElement.signed_integer(0, 1), DataElement.text_string(b'hello')]
     )
     basic_check(e)