Add options for specifying address or scan for device

mc-cli.py

@@ -1,13 +1,10 @@
 #!/usr/bin/python
-
 import asyncio
 import sys
 import json
 import time
 import datetime
-
-from itertools import count, takewhile
-from typing import Iterator
+import getopt
 
 from bleak import BleakClient, BleakScanner
 from bleak.backends.characteristic import BleakGATTCharacteristic
@@ -18,7 +15,10 @@ UART_SERVICE_UUID = "6E400001-B5A3-F393-E0A9-E50E24DCCA9E"
 UART_RX_CHAR_UUID = "6E400002-B5A3-F393-E0A9-E50E24DCCA9E"
 UART_TX_CHAR_UUID = "6E400003-B5A3-F393-E0A9-E50E24DCCA9E"
 
-ADDRESS = "F0:F5:BD:4F:9B:AD"
+# BLE adress of the device 
+# if None or "" then a scan is performed
+#ADDRESS = "F0:F5:BD:4F:9B:AD"
+ADDRESS = ""
 
 class MeshCore:
     """
@@ -28,9 +28,26 @@ class MeshCore:
     contacts={}
 
     def __init__(self, address):
-        self.client = BleakClient(address)
+        self.address = address
+        self.client = None
 
     async def connect(self):
+
+
+        def match_meshcore_device(device: BLEDevice, adv: AdvertisementData):
+            if adv.local_name == "MeshCore" :
+                return True
+            return False
+
+        if self.address is None or self.address == "" :
+            scanner = BleakScanner()
+            print("Scanning for devices")
+            device = await scanner.find_device_by_filter(match_meshcore_device)
+            print(f"Found device : {device}")
+            self.client = BleakClient(device)
+        else:
+            self.client = BleakClient(self.address)
+
         result = asyncio.Future()
         await self.client.connect(disconnected_callback=self.handle_disconnect)
         await self.client.start_notify(UART_TX_CHAR_UUID, self.handle_rx)
@@ -220,17 +237,26 @@ async def next_cmd(mc, cmds):
     print (f"cmd {cmds[0:argnum+1]} processed ...")
     return cmds[argnum+1:]
 
-async def main(args):
+async def main(argv):
+    address = ADDRESS
 
-    if len(args) < 2:
+    opts, args = getopt.getopt(sys.argv[1:], "a:s")
+    for opt, arg in opts :
+        match opt:
+            case "-a" : # address specified on cmdline
+                address = arg
+            case "-s" : # explicitely ask to scan address
+                address = None
+
+    if len(args) == 0 :
         print("Commands : send, sendto, recv, contacts, infos")
         return
 
-    mc = MeshCore(ADDRESS)
+    mc = MeshCore(address)
     await mc.connect()
 
-    cmds = args[1:]
-    while len(cmds)>0 :
+    cmds = args
+    while len(cmds) > 0 :
         cmds = await next_cmd(mc, cmds)
 
 asyncio.run(main(sys.argv))