Add channel commands and fix a lint error

src/meshcore/commands.py

@@ -382,6 +382,25 @@ class CommandHandler:
         data = b"\x32" + cmd.encode('utf-8')
         return await self.send(data, [EventType.CLI_RESPONSE, EventType.ERROR])
         
+    async def get_channel(self, channel_idx: int) -> Event:
+        logger.debug(f"Getting channel info for channel {channel_idx}")
+        data = b"\x1f" + channel_idx.to_bytes(1, 'little')
+        return await self.send(data, [EventType.CHANNEL_INFO, EventType.ERROR])
+        
+    async def set_channel(self, channel_idx: int, channel_name: str, channel_secret: bytes) -> Event:
+        logger.debug(f"Setting channel {channel_idx}: name={channel_name}")
+        
+        # Pad channel name to 32 bytes
+        name_bytes = channel_name.encode('utf-8')[:32]
+        name_bytes = name_bytes.ljust(32, b'\x00')
+        
+        # Ensure channel secret is exactly 16 bytes
+        if len(channel_secret) != 16:
+            raise ValueError("Channel secret must be exactly 16 bytes")
+            
+        data = b"\x20" + channel_idx.to_bytes(1, 'little') + name_bytes + channel_secret
+        return await self.send(data, [EventType.OK, EventType.ERROR])
+        
     async def send_trace(self, auth_code: int = 0, tag: Optional[int] = None, 
                       flags: int = 0, path: Optional[Union[str, bytes, bytearray]] = None) -> Event:
         """

src/meshcore/events.py

@@ -35,6 +35,7 @@ class EventType(Enum):
     RX_LOG_DATA = "rx_log_data"
     TELEMETRY_RESPONSE = "telemetry_response"
     CUSTOM_VARS = "custom_vars"
+    CHANNEL_INFO = "channel_info"
     
     # Command response types
     OK = "command_ok"

src/meshcore/reader.py

@@ -218,7 +218,23 @@ class MessageReader:
                     psplit = p.split(":")
                     res[psplit[0]] = psplit[1]
             logger.debug(f"got custom vars : {res}")
-            await self.dispatcher.dispatch(Event(EventType.CUSTOM_VARS, res))   
+            await self.dispatcher.dispatch(Event(EventType.CUSTOM_VARS, res))
+            
+        elif packet_type_value == PacketType.CHANNEL_INFO.value:
+            logger.debug(f"received channel info response: {data.hex()}")
+            res = {}
+            res["channel_idx"] = data[1]
+            
+            # Channel name is null-terminated, so find the first null byte
+            name_bytes = data[2:34]
+            null_pos = name_bytes.find(0)
+            if null_pos >= 0:
+                res["channel_name"] = name_bytes[:null_pos].decode('utf-8')
+            else:
+                res["channel_name"] = name_bytes.decode('utf-8')
+                
+            res["channel_secret"] = data[34:50]
+            await self.dispatcher.dispatch(Event(EventType.CHANNEL_INFO, res, res))   
 
         # Push notifications
         elif packet_type_value == PacketType.ADVERTISEMENT.value:
@@ -404,13 +420,13 @@ class MessageReader:
 
             """Parse a given byte string and return as a LppFrame object."""
             i = 0
-            data = []
+            lpp_data_list = []
             while i < len(buf) and buf[i] != 0:
                 lppdata = LppData.from_bytes(buf[i:])
-                data.append(lppdata)
+                lpp_data_list.append(lppdata)
                 i = i + len(lppdata)
 
-            lpp = json.loads(json.dumps(LppFrame(data), default=lpp_json_encoder))
+            lpp = json.loads(json.dumps(LppFrame(lpp_data_list), default=lpp_json_encoder))
 
             res["lpp"] = lpp