nargs='?' is awesome! get rid of ble_dest.

Author: geeksville

.vscode/launch.json

@@ -10,7 +10,7 @@
       "request": "launch",
       "module": "meshtastic",
       "justMyCode": false,
-      "args": ["--ble", "--ble-dest", "Meshtastic_9f6e"]
+      "args": ["--ble", "Meshtastic_9f6e"]
     },
      {
       "name": "meshtastic BLE scan",

meshtastic/__main__.py

@@ -1046,7 +1046,7 @@ def common():
                     print(f"Found: name='{x.name}' address='{x.address}'")
                 meshtastic.util.our_exit("BLE scan finished", 0)
             elif args.ble:
-                client = BLEInterface(args.ble_dest, debugOut=logfile, noProto=args.noproto, noNodes=args.no_nodes)
+                client = BLEInterface(args.ble if args.ble != "any" else None, debugOut=logfile, noProto=args.noproto, noNodes=args.no_nodes)
             elif args.host:
                 try:
                     client = meshtastic.tcp_interface.TCPInterface(
@@ -1114,14 +1114,10 @@ def addConnectionArgs(parser: argparse.ArgumentParser) -> argparse.ArgumentParse
 
     group.add_argument(
         "--ble",
-        help="The BLE device address or name to connect to",
-        action="store_true",
-    )
-
-    outer.add_argument(
-        "--ble-dest",
-        help="The BLE device address or name to connect to",
+        help="Connect to a BLE device, optionally specifying a device name (defaults to 'any')",
+        nargs="?",
         default=None,
+        const="any"
     )
 
     return parser