Android Question Timee Period Inconsistent

Sub Service_Create
    'This is the program entry point.
    'This is a good place to load resources that are not specific to a single activity.
    Service.AutomaticForegroundMode = Service.AUTOMATIC_FOREGROUND_ALWAYS
   
    DateTime.DateFormat = "dd/mm/yyyy"
    DateTime.TimeFormat = "hh:mm:ss.SSS"
   
    'Start the WiFi and connect a socket for comms with the embedded server
    initaliseComms
   
    If WiFiRealTimeDataTmr.IsInitialized = False Then
        WiFiRealTimeDataTmr.Initialize("tmr_WiFiRealTimeData", 2000)
    End If

   
    Conv.LittleEndian = True
   
    If dbStartup = 0 Then
            #If LOGGING_ON
        Log("DB Startup Failed - Main")
            #End If
    Else
        init_Sql1
    End If
       
    rtData_s.Initialize

    startTime = DateTime.Time(DateTime.Now)
End Sub

'======================================================================================
Sub tmr_WiFiRealTimeData_Tick
    If WifITransactionInProgress = True Then Sleep(1000)
    WifITransactionInProgress = True
    sendCommand(embeddedCmds.GetRealtimeData)
    Wait For CanContinue
End Sub

'==========================================
Sub sendCommand(cmdCode As Int) As Int
    If Astream.IsInitialized = False Then
        Return WIFI_ERROR
    End If

    Dim buffer(121) As Byte
    Dim strBuff As String

    Select cmdCode
        Case 0    ' Get Parameters from Controller
            strBuff = "$GetInstData,"
            buffer = strBuff.GetBytes("UTF8")
            Astream.Write(buffer)
            #If LOGGING_ON
'            Log("Tx: " & strBuff)
            #End If
    End Select
'    CmdTimeoutTmr.Enabled = True debug
   
    Return WIFI_OK
End Sub