Problem to Send data to BLE device with Write function

[jym92]

hi ,

Thanks for your api !

It's work fine to recept data from a BLE device !

But Now I need to send a character to my BLE device to control it (I use HM-10).

to do this, I write this specific code :

`
// On click :
void Disconnect_Clicked(object sender, System.EventArgs e)
{
Console.WriteLine("Disconnect");

        ReadCharacteristics();
        Task.Delay(200);
        Ble_sendMessage("S");
        Task.Delay(200);
    }

void ReadCharacteristics()
{
BLEconnect.ConnectDevice.CharacteristicsDiscovered(cha =>
{
Device.BeginInvokeOnMainThread(() => {
AllCharacteristics.Add(cha);
CharacteristicsList.Add(new CharacteristicsList(cha.Uuid, cha.CanRead(), cha.CanWrite(), cha.CanNotify()));
});
});
}

void Ble_sendMessage(String str)
{
foreach (var c in AllCharacteristics)
{
Console.WriteLine("Characteristic test :" + c.Uuid);
// search my specific charac :
if (c.Uuid == "0000ffe1-0000-1000-8000-00805f9b34fb")
{
//var bytes = StringToByteArray(str);
var bytes = Encoding.ASCII.GetBytesstr);
if (bytes != null) c.Write(bytes);
else Console.WriteLine("message empty !");
Console.WriteLine("message send !");

            }
        }
    }

`

But when I try this code, I have an fatal error on "c.Write(bytes);", bytes is not empty but he don't find reference ...

Do you have an idea to solve this issue ?

Thanks !

[jojan5]

did you solve it?