Android Question (IOException) java.io.IOException: read failed, socket might closed or timeout, read ret: -1

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

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

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

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

    End If
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
    Public deviceName As String = "linvor"
    Public deviceFound As Boolean
End Sub

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

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

Private Sub admin_DeviceFound (Name As String, MacAddress As String)
    Log($"Device found: ${Name}"$)
    If Name = deviceName Then
        If deviceFound Then Return
        deviceFound = True
        admin.CancelDiscovery
        serial.Connect(MacAddress)
        Log("Trying to connect to " & MacAddress )
    End If
End Sub