[Débutant] win10IoT - UWP - handle is invalid

Bonjour,

J'ai un petit problème avec mon app UWP, j'essaie d'allumer une LED, la fonction INIT fonctionne (la LED s'allume lors de l'initialisation du GPIO), cependant quand je clique sur les boutons ON ou OFF j'ai l'erreur suivante :

Citation:

System.runtime.interopservices.comexception (0x80070006) The handle is invalid.

MainPage.Xaml

Code:

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        <StackPanel x:Name="pnlOneLed" HorizontalAlignment="Center" VerticalAlignment="Top" Margin="10,160,10,10" Width="340">
            <Button x:Name="btnOneLedInit" Content="Init"  Margin="10" HorizontalAlignment="Center" Click="btnOneLedInit_Click"/>
            <TextBox x:Name="tbxOneLedStatement" Text="Led, Statement!" Margin="10" IsReadOnly="True"/>
            <Button x:Name="btnOneLedPushON" Content="ON"  Margin="10" HorizontalAlignment="Center" Click="btnOneLedPushON_Click"/>
            <Button x:Name="btnOneLedPushOFF" Content="OFF"  Margin="10" HorizontalAlignment="Center" Click="btnOneLedPushOFF_Click"/>
            <Image x:Name="imgOneLedDemo" Height="100" Margin="10" HorizontalAlignment="Stretch" Source="Assets/gpio-numbers-pi2.png" />
        </StackPanel>

MainPage.Xaml.vb

Code:

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	Private Sub MainPage_Loaded() Handles Me.Loaded
        OneLed_Load()
    End Sub
 
    Private Sub MainPage_Unloaded() Handles Me.Unloaded
        UnloadGPIO()
    End Sub
 
	Private stateGpioPin5 As Integer = -1 '-1 : no value / 0 : OFF / 1 : ON
    Private Const idGpioPin5 As Integer = 5 'GPIO Pin(5) = Physical Pin(29)
    Private esGpioPin5 As GpioPin
    Private esGpioPinValue5 As GpioPinValue
 
    Private Sub OneLed_Load()
        btnOneLedInit.Content = "Click Me for Init"
    End Sub
 
    Private Sub btnOneLedInit_Click(sender As Object, e As RoutedEventArgs) Handles btnOneLedInit.Click
        Try
            If stateGpioPin5 < 0 Then
                If InitGPIO() Then
                    btnOneLedInit.Content = "Disable"
                    tbxOneLedStatement.Text = "GPIO ENABLE !"
                End If
            ElseIf stateGpioPin5 >= 0 Then
                If UnloadGPIO() Then
                    btnOneLedInit.Content = "Enable"
                    tbxOneLedStatement.Text = "GPIO DISABLE !"
                End If
            End If
        Catch ex As Exception
            tbxOneLedStatement.Text = "btnOneLedInit_Click FAILED : " & ex.ToString
        End Try
    End Sub
 
    Private Sub btnOneLedPushON_Click(sender As Object, e As RoutedEventArgs) Handles btnOneLedPushON.Click
        If PushGPIO(True) Then
            tbxOneLedStatement.Text = "LED ON !"
        Else
            UnloadGPIO()
        End If
    End Sub
 
    Private Sub btnOneLedPushOFF_Click(sender As Object, e As RoutedEventArgs) Handles btnOneLedPushOFF.Click
        If PushGPIO(False) Then
            tbxOneLedStatement.Text = "LED OFF !"
        Else
            UnloadGPIO()
        End If
    End Sub
 
    Private Function PushGPIO(pStatement As Boolean) As Boolean
        Dim output As Boolean = False
        Try
            If pStatement Then
                esGpioPinValue5 = (GpioPinValue.High)
            Else
                esGpioPinValue5 = (GpioPinValue.Low)
            End If
            esGpioPin5.Write(esGpioPinValue5)
 
            output = True
        Catch ex As Exception
            tbxOneLedStatement.Text = "PushGPIO FAILED : " & ex.ToString
        End Try
 
        Return output
    End Function
 
    Private Function InitGPIO() As Boolean
        Dim output As Boolean = False
        Try
            Dim gpio = GpioController.GetDefault()
            If Not gpio Is Nothing Then
                esGpioPin5 = gpio.OpenPin(idGpioPin5)
                esGpioPin5.Write(GpioPinValue.Low)
                esGpioPin5.SetDriveMode(GpioPinDriveMode.Output)
                stateGpioPin5 = 0
 
                output = True
            End If
        Catch ex As Exception
            tbxOneLedStatement.Text = "InitGPIO FAILED : " & ex.ToString
        End Try
 
        Return output
    End Function
 
    Private Function UnloadGPIO() As Boolean
        Dim output As Boolean = False
        Try
            esGpioPin5.Dispose()
            stateGpioPin5 = -1
 
            output = True
        Catch ex As Exception
            tbxOneLedStatement.Text = "UnloadGPIO FAILED : " & ex.ToString
        End Try
 
        Return output
    End Function

Merci de votre aide =)