Add channel commands and fix a lint error

examples/serial_channel_manager.py

@@ -0,0 +1,116 @@
+#!/usr/bin/env python3
+
+import asyncio
+import sys
+from meshcore import MeshCore
+from meshcore.events import EventType
+
+# Default port - change as needed
+PORT = "/dev/tty.usbserial-583A0069501"
+BAUDRATE = 115200
+
+async def main():
+    # Check command line arguments
+    if len(sys.argv) > 1:
+        port = sys.argv[1]
+    else:
+        port = PORT
+        
+    print(f"Connecting to device on {port}...")
+    
+    try:
+        mc = await MeshCore.create_serial(port, BAUDRATE, debug=True)
+        print("Connected!")
+        
+        # Display device info
+        print(f"Device: {mc.self_info.get('adv_name', 'Unknown')}")
+        print(f"Public Key: {mc.self_info.get('public_key', 'Unknown')}")
+        print()
+        
+        while True:
+            print("Channel Manager")
+            print("1. Get channel info")
+            print("2. Set channel")
+            print("3. Exit")
+            choice = input("Enter choice (1-3): ")
+            
+            if choice == "1":
+                await get_channel_info(mc)
+            elif choice == "2":
+                await set_channel_config(mc)
+            elif choice == "3":
+                break
+            else:
+                print("Invalid choice. Please try again.\n")
+                
+    except Exception as e:
+        print(f"Error: {e}")
+    finally:
+        if 'mc' in locals():
+            await mc.disconnect()
+            print("Disconnected.")
+
+async def get_channel_info(mc):
+    """Get information about a specific channel"""
+    try:
+        channel_idx = int(input("Enter channel index (0-255): "))
+        
+        print(f"Getting info for channel {channel_idx}...")
+        result = await mc.commands.get_channel(channel_idx)
+        
+        if result.type == EventType.CHANNEL_INFO:
+            payload = result.payload
+            print(f"Channel {payload.get('channel_idx', 'Unknown')}:")
+            print(f"  Name: {payload.get('channel_name', 'Unknown')}")
+            print(f"  Secret: {payload.get('channel_secret', b'').hex()}")
+        elif result.type == EventType.ERROR:
+            print(f"Error getting channel info: {result.payload}")
+        else:
+            print(f"Unexpected response: {result.type}")
+            
+    except ValueError:
+        print("Invalid channel index. Please enter a number.")
+    except Exception as e:
+        print(f"Error: {e}")
+    print()
+
+async def set_channel_config(mc):
+    """Configure a channel with name and secret"""
+    try:
+        channel_idx = int(input("Enter channel index (0-255): "))
+        channel_name = input("Enter channel name (max 32 chars): ")
+        
+        # Get secret as hex string
+        print("Enter channel secret as hex (32 hex chars for 16 bytes):")
+        print("Example: 0123456789abcdef0123456789abcdef")
+        secret_hex = input("Secret: ").strip()
+        
+        # Validate and convert secret
+        if len(secret_hex) != 32:
+            print("Error: Secret must be exactly 32 hex characters (16 bytes)")
+            return
+            
+        try:
+            channel_secret = bytes.fromhex(secret_hex)
+        except ValueError:
+            print("Error: Invalid hex string")
+            return
+            
+        print(f"Setting channel {channel_idx}...")
+        result = await mc.commands.set_channel(channel_idx, channel_name, channel_secret)
+        
+        if result.type == EventType.OK:
+            print("Channel configured successfully!")
+        elif result.type == EventType.ERROR:
+            print(f"Error setting channel: {result.payload}")
+        else:
+            print(f"Unexpected response: {result.type}")
+            
+    except ValueError:
+        print("Invalid input. Please enter valid numbers.")
+    except Exception as e:
+        print(f"Error: {e}")
+    print()
+
+if __name__ == "__main__":
+    asyncio.run(main())