Add property for adapter’s power state

Author: larsblumberg

gatt/gatt_linux.py

@@ -37,6 +37,7 @@ def __init__(self, adapter_name):
             raise _error_from_dbus_error(e)
         object_manager_object = self._bus.get_object("org.bluez", "/")
         self._adapter = dbus.Interface(adapter_object, 'org.bluez.Adapter1')
+        self._adapter_properties = dbus.Interface(self._adapter, 'org.freedesktop.DBus.Properties')
         self._object_manager = dbus.Interface(object_manager_object, "org.freedesktop.DBus.ObjectManager")
         self._device_path_regex = re.compile('^/org/bluez/' + adapter_name + '/dev((_[A-Z0-9]{2}){6})$')
         self._devices = {}
@@ -47,6 +48,14 @@ def __init__(self, adapter_name):
 
         self.update_devices()
 
+    @property
+    def is_adapter_powered(self):
+        return self._adapter_properties.Get('org.bluez.Adapter1', 'Powered') == 1
+
+    @is_adapter_powered.setter
+    def is_adapter_powered(self, powered):
+        return self._adapter_properties.Set('org.bluez.Adapter1', 'Powered', dbus.Boolean(powered))
+
     def run(self):
         """
         Starts the main loop that is necessary to receive Bluetooth events from the Bluetooth adapter.
@@ -129,7 +138,9 @@ def start_discovery(self, service_uuids=[]):
             self._adapter.StartDiscovery()
         except dbus.exceptions.DBusException as e:
             if e.get_dbus_name() == 'org.bluez.Error.NotReady':
-                raise errors.NotReady("Bluetooth adapter not ready. Run 'echo \"power on\" | sudo bluetoothctl'.")
+                raise errors.NotReady(
+                    "Bluetooth adapter not ready. "
+                    "Set `is_adapter_powered` to `True` or run 'echo \"power on\" | sudo bluetoothctl'.")
             if e.get_dbus_name() == 'org.bluez.Error.InProgress':
                 # Discovery was already started - ignore exception
                 pass

gattctl.py

@@ -65,6 +65,18 @@ def main():
         default='hci0',
         help="Name of Bluetooth adapter, defaults to 'hci0'")
     arg_commands_group = arg_parser.add_mutually_exclusive_group(required=True)
+    arg_commands_group.add_argument(
+        '--power-on',
+        action='store_true',
+        help="Powers the adapter on")
+    arg_commands_group.add_argument(
+        '--power-off',
+        action='store_true',
+        help="Powers the adapter off")
+    arg_commands_group.add_argument(
+        '--powered',
+        action='store_true',
+        help="Print the adapter's power state")
     arg_commands_group.add_argument(
         '--discover',
         action='store_true',
@@ -89,6 +101,17 @@ def main():
     global device_manager
     device_manager = AnyDeviceManager(adapter_name=args.adapter)
 
+    if args.power_on:
+        device_manager.is_adapter_powered = True
+        print("Powered on")
+        return
+    elif args.power_off:
+        device_manager.is_adapter_powered = False
+        print("Powered off")
+        return
+    elif args.powered:
+        print("Powered: ", device_manager.is_adapter_powered)
+        return
     if args.discover:
         device_manager.start_discovery()
     elif args.connect: