Android Question How to retrieve a Characteristic value from its UUID ?

Sub Process_Globals
    'These global variables will be declared once when the application starts.
    'These variables can be accessed from all modules.

    Private manager As BleManager2
    Private rp As RuntimePermissions
   
    Dim BLEId As String = ""
    Dim BLEService As String = ""
    Dim BLECharacteristic As String = ""
   
    Dim BLEReadyFlag As Boolean = 0
       
End Sub

Sub Manager_Connected(Services As List)
   
    Log("Manager_Connected, Services are:")
   
    For Each S As String In Services
        Log("  [" & S & "]")
       
        If S.Contains("07:45") Then    '*** PUT FILTER FOR RELAY SERVICE HERE ***
            BLEService = S
            BLEReadyFlag = True
        End If
    Next
   
End Sub

Sub Manager_DataAvailable(ServiceID As String, Characteristics As Map)
   
    For Each S As String In Characteristics.Keys
        If S.StartsWith("835ab4c0") Then   'you say lazy, I say flexible
            SensorCharacteristic = S
           
            Dim Data1() As Byte = Characteristics.Get(SensorCharacteristic)
           
            SensorReadingRaw = BytesToShort(Data1(1), Data1(0))
            SensorReadingTime = DateTime.Now
           
            Exit    'for each
        End If
    Next
       
End Sub