request device info

utils.py

@@ -1,5 +1,6 @@
 import asyncio
 import logging
+import re
 
 logger = logging.getLogger(__name__)
 
@@ -18,4 +19,16 @@ async def run_system_command(cmd):
     if stderr:
         logger.debug(f'[stderr]\n{stderr.decode()}')
 
-    return proc.returncode
+    return proc.returncode, stdout, stderr
+
+"""
+async def get_bt_mac_address(dev=0):
+    ret, stdout, stderr = await run_system_command(f'hciconfig hci{dev}')
+    # TODO: Process error handling
+
+    match = re.search(r'BD Address: (?P<mac>\w\w:\w\w:\w\w:\w\w:\w\w:\w\w)', stdout.decode('UTF-8'))
+    if match:
+        return list(map(lambda x: int(x, 16), match.group('mac').split(':')))
+    else:
+        raise ValueError(f'BD Address not found in "{stdout}"')
+"""