Do this without the asyncio with.

ch-13/1-modelling-space/computer/robot_ble_connection.py

@@ -11,11 +11,9 @@ class BleConnection:
     adafruit_tx_uuid = "6E400002-B5A3-F393-E0A9-E50E24DCCA9E"
     ble_name = "Adafruit Bluefruit LE"
 
-    def __init__(self, receive_handler: typing.Callable[[bytes], None], 
-            connected_handler: typing.Callable[[], None]):
+    def __init__(self, receive_handler: typing.Callable[[bytes], None]):
         self.ble_client : bleak.BleakClient = None
         self.receive_handler = receive_handler
-        self.connected_handler = connected_handler
 
     def _uart_handler(self, _, data: bytes):
         self.receive_handler(data)
@@ -27,16 +25,16 @@ class BleConnection:
         print([device.name for device in devices])        
         ble_device_info = [device for device in devices if device.name==self.ble_name][0]
         print("Connecting to {}...".format(ble_device_info.name))
-        async with bleak.BleakClient(ble_device_info.address) as ble_client:
-            self.ble_client = ble_client
-            self.connected_handler()
-            print("Connected to {}".format(ble_device_info.name))
-            asyncio.create_task(
-                self.ble_client.start_notify(self.adafruit_rx_uuid, self._uart_handler)
-            )
-            while True:
-                await asyncio.sleep(1)
+        self.ble_client = bleak.BleakClient(ble_device_info.address)
+        await self.ble_client.connect()
+        print("Connected to {}".format(ble_device_info.name))
+        self.notify_task = asyncio.create_task(
+            self.ble_client.start_notify(self.adafruit_rx_uuid, self._uart_handler)
+        )
 
+    async def close(self):
+        await self.ble_client.disconnect()
+                
     def send_uart_data(self, data: bytes):
         if self.ble_client:
             asyncio.create_task(