BlueZ nee to send data off as a list of ints not a byte array

Addresses #41

bless/backends/bluezdbus/characteristic.py

@@ -78,7 +78,7 @@ async def init(self, service: "BlessGATTServiceBlueZDBus"):
     @property
     def value(self) -> bytearray:
         """Get the value of the characteristic"""
-        return self._value
+        return bytearray(self._value)
 
     @value.setter
     def value(self, val: bytearray):

bless/backends/bluezdbus/server.py

@@ -2,7 +2,7 @@
 
 from uuid import UUID
 
-from typing import Optional, Dict, Any, cast
+from typing import Optional, Dict, Any, cast, List
 
 from asyncio import AbstractEventLoop
 from twisted.internet.asyncioreactor import AsyncioSelectorReactor  # type: ignore
@@ -223,23 +223,25 @@ def update_value(self, service_uuid: str, char_uuid: str) -> bool:
         characteristic.value = cur_value
         return True
 
-    def read(self, char: BlueZGattCharacteristic) -> bytearray:
+    def read(self, char: BlueZGattCharacteristic) -> List[int]:
         """
         Read request.
         This re-routes the the request incomming on the dbus to the server to
         be re-routed to the user defined handler
 
+        Note: the BlueZ App handles the data as a list of ints
+
         Parameters
         ----------
         char : BlueZGattCharacteristic
             The characteristic passed from the app
 
         Returns
         -------
-        bytearray
+        List[int]
             The value of the characteristic
         """
-        return self.read_request(char.uuid)
+        return list(self.read_request(char.uuid))
 
     def write(self, char: BlueZGattCharacteristic, value: bytearray):
         """