Android Question Bluetooth : 30x data should be received every 400 ms

Sub Process_Globals
   
End Sub

Sub Globals
    Dim btnvor As Button
    Dim btnzur As Button
   
    Dim btnlinks As Button
    Dim btnhlinks As Button
    Dim btnmitte As Button
    Dim btnhrechts As Button
    Dim btnrechts As Button
   
    Dim btnv0 As Button
    Dim btnv1 As Button
    Dim btnv2 As Button
   
    Dim btnser0 As Button
    Dim btnser1 As Button
    Dim btnsharp As Button
   
    Dim text_vor As Byte
    Dim text_zur As Byte
   
    Dim text_links As Byte
    Dim text_hlinks As Byte
    Dim text_mitte As Byte
    Dim text_hrechts As Byte
    Dim text_rechts As Byte
   
    Dim text_v0 As Byte
    Dim text_v1 As Byte
    Dim text_v2 As Byte
   
    Dim text_ser0 As Byte
    Dim text_ser1 As Byte
    Dim text_sharp As Byte   

    Private lblStatus As Label
    Private btnConnect As Button
    Private lblMessage As Label
    Private ProgressBar1 As ProgressBar
End Sub

Sub Activity_Create(FirstTime As Boolean)
    Activity.LoadLayout("1")
   
    text_vor=118
    text_zur=122
   
    text_links=108
    text_hlinks=107
    text_mitte=109
    text_hrechts=104   
    text_rechts=114
   
    text_v0=119
    text_v1=115
    text_v2=120
   
    text_ser0=113
    text_ser1=117
    text_sharp=102
End Sub

Sub Activity_Resume
    SetState
End Sub

Public Sub SetState
    btnvor.Enabled = Starter.connected
    btnzur.Enabled = Starter.connected
   
    btnlinks.Enabled = Starter.connected
    btnhlinks.Enabled = Starter.connected
    btnmitte.Enabled = Starter.connected
    btnhrechts.Enabled = Starter.connected
    btnrechts.Enabled = Starter.connected
   
    btnv0.Enabled = Starter.connected
    btnv1.Enabled = Starter.connected
    btnv2.Enabled = Starter.connected
   
    btnser0.Enabled = Starter.connected
    btnser1.Enabled = Starter.connected
    btnsharp.Enabled = Starter.connected
   
    btnConnect.Enabled = Not(Starter.connected)
    ProgressBar1.Visible = Starter.connecting
   
    Dim status As String
    If Starter.connected Then
        status = "connected"
    else if Starter.connecting Then
        status = "trying to connect..."
    Else
        status = "disconnected"
    End If
    lblStatus.Text = $"Status: ${status}"$
End Sub

Public Sub MessageFromDevice(msg As String)
    lblMessage.Text = msg
End Sub

Sub Activity_Pause (UserClosed As Boolean)

End Sub

Sub btnvor_Click
    CallSub2(Starter, "SendMessage", Array As Byte(0, text_vor))
End Sub   
Sub btnzur_Click
    CallSub2(Starter, "SendMessage", Array As Byte(0, text_zur))
End Sub

Sub btnlinks_Click
    CallSub2(Starter, "SendMessage", Array As Byte(0, text_links))
End Sub
Sub btnhlinks_Click
    CallSub2(Starter, "SendMessage", Array As Byte(0, text_hlinks))
End Sub
Sub btnmitte_Click
    CallSub2(Starter, "SendMessage", Array As Byte(0, text_mitte))
End Sub
Sub btnhrechts_Click
    CallSub2(Starter, "SendMessage", Array As Byte(0, text_hrechts))
End Sub
Sub btnrechts_Click
    CallSub2(Starter, "SendMessage", Array As Byte(0, text_rechts))
End Sub

Sub btnv0_Click
    CallSub2(Starter, "SendMessage", Array As Byte(0, text_v0))
End Sub
Sub btnv1_Click
    CallSub2(Starter, "SendMessage", Array As Byte(0, text_v1))
End Sub
Sub btnv2_Click
    CallSub2(Starter, "SendMessage", Array As Byte(0, text_v2))
End Sub

Sub btnser0_Click
    CallSub2(Starter, "SendMessage", Array As Byte(0, text_ser0))
End Sub
Sub btnser1_Click
    CallSub2(Starter, "SendMessage", Array As Byte(0, text_ser1))
End Sub
Sub btnsharp_Click
    CallSub2(Starter, "SendMessage", Array As Byte(0, text_sharp))
End Sub

Sub btnConnect_Click
    CallSub(Starter, "Connect")
End Sub

Sub lblStatus_Click
   
End Sub

Sub Process_Globals
    Private serial As Serial
    Private admin As BluetoothAdmin
    Private ast As AsyncStreamsText
    Public connected As Boolean
    Public connecting As Boolean
End Sub

Sub Service_Create
    serial.Initialize("serial")
    admin.Initialize("admin")
End Sub

Public Sub Connect
    admin.StartDiscovery
    connecting = True
    CallSub(Main, "SetState")
End Sub

Private Sub admin_DeviceFound (Name As String, MacAddress As String)
    Log($"Device found: ${Name}"$)
    If Name = "HC-06" Then
        Log("Trying to connect...")
        admin.CancelDiscovery
        serial.Connect(MacAddress)
    End If
End Sub

Private Sub admin_DiscoveryFinished
    connecting = False
End Sub

Private Sub Serial_Connected (Success As Boolean)
    If Success Then
        If ast.IsInitialized Then ast.Close
        ast.Initialize(Me, "Ast", serial.InputStream, serial.OutputStream)
        Log("Connected")
        connected = True
       
    Else
        Log(LastException)
    End If
    connecting = False
    CallSub(Main, "SetState")
End Sub

Public Sub SendMessage(msg() As Byte)
    ast.astreams.Write(msg) 'sending bytes, not text
End Sub

Private Sub ast_NewText (Text As String)
    CallSub2(Main, "MessageFromDevice", Text)
End Sub

Private Sub ast_Terminated
    connected = False
    CallSub(Main, "SetState")
End Sub

Sub Service_Start (StartingIntent As Intent)

End Sub

'Return true to allow the OS default exceptions handler to handle the uncaught exception.
Sub Application_Error (Error As Exception, StackTrace As String) As Boolean
    Return True
End Sub

Sub Service_Destroy

End Sub

#Event: NewText (Text As String)
#Event: Terminated

'version: 1.00
'Class module
Sub Class_Globals
    Private mTarget As Object
    Private mEventName As String
    Public astreams As AsyncStreams
    Public charset As String = "UTF8"
    Private sb As StringBuilder
End Sub

Public Sub Initialize (TargetModule As Object, EventName As String, In As InputStream, out As OutputStream)
    mTarget = TargetModule
    mEventName = EventName
    astreams.Initialize(In, out, "astreams")
    sb.Initialize
End Sub

'Sends the text. Note that this method does not add end of line characters.
Public Sub Write(Text As String)
    astreams.Write(Text.GetBytes(charset))
End Sub

Private Sub astreams_NewData (Buffer() As Byte)
    Dim newDataStart As Int = sb.Length
    sb.Append(BytesToString(Buffer, 0, Buffer.Length, charset))
    Dim s As String = sb.ToString
    Dim start As Int = 0
   
    For i = newDataStart To s.Length - 1
        Dim c As Char = s.CharAt(i)
            If i = 0 And c = Chr(10) Then '\n...
            start = 1 'might be a broken end of line character
            Continue
        End If
        If c = Chr(10) Then '\n
            CallSubDelayed2(mTarget, mEventName & "_NewText", s.SubString2(start, i))
            start = i + 1
        Else If c = Chr(13) Then '\r
            CallSubDelayed2(mTarget, mEventName & "_NewText", s.SubString2(start, i))
            If i < s.Length - 1 And s.CharAt(i + 1) = Chr(10) Then '\r\n
                i = i + 1
            End If
            start = i + 1
        End If
    Next
   
    If start > 0 Then sb.Remove(0, start)
End Sub

Private Sub astreams_Terminated
    CallSubDelayed(mTarget, mEventName & "_Terminated")
End Sub

Private Sub astreams_Error
    Log("error: " & LastException)
    astreams.Close
    CallSubDelayed(mTarget, mEventName & "_Terminated")
End Sub

Public Sub Close
    astreams.Close
End Sub