public override async void Prepare(MvxBundle parameters)
{
base.Prepare(parameters);
_characteristic = await GetCharacteristicFromBundleAsync(parameters);
Descriptors = await _characteristic?.GetDescriptorsAsync();
RaisePropertyChanged(nameof(Descriptors));
}
protected override async void InitFromBundle(IMvxBundle parameters)
{
base.InitFromBundle(parameters);
_characteristic = await GetCharacteristicFromBundleAsync(parameters);
Descriptors = await _characteristic?.GetDescriptorsAsync();
RaisePropertyChanged(nameof(Descriptors));
}
private async void btnDescriptors_Clicked(object sender, EventArgs e)
{
descriptors = await Characteristic.GetDescriptorsAsync();
descriptor = await Characteristic.GetDescriptorAsync(Guid.Parse("guid"));
}
private async void InitalizeCommandButton_Clicked(object sender, EventArgs e)
{
try
{
var service = await _connectedDevice.GetServiceAsync(GattIdentifiers.UartGattServiceId);
if (service != null)
{
sendCharacteristic = await service.GetCharacteristicAsync(GattIdentifiers.UartGattCharacteristicSendId);
receiveCharacteristic = await service.GetCharacteristicAsync(GattIdentifiers.UartGattCharacteristicReceiveId);
if (receiveCharacteristic != null)
{
var descriptors = await receiveCharacteristic.GetDescriptorsAsync();
receiveCharacteristic.ValueUpdated += (o, args) =>
{
var receivedBytes = args.Characteristic.Value;
XamarinEssentials.MainThread.BeginInvokeOnMainThread(() =>
{
btdata += Encoding.UTF8.GetString(receivedBytes, 0, receivedBytes.Length); // + Environment.NewLine;
if (btdata.Substring(0, 3) != "EEE")
{
btdata = null;
}
//----------Uncomment the lines below to display the Datas length-----------\\
//tring btData = receivedBytes.Length.ToString();
// RawData.Text = btdata;
//----------Uncomment the lines below to display the RawData----------\\
//RawData.Text = btdata;
var dataLength = btdata.Length;
if (dataLength >= 39 && (btdata.Substring(37, 2) == "GG")) //Checks to make sure the recived data is the correct length
{
dataParse();
formatTheData();
InitButton.BackgroundColor = Color.Transparent;
btdata = null; //Removes previous string after parsing data\
}
else if (dataLength >= 39)
{
btdata = null;
}
});
};
await receiveCharacteristic.StartUpdatesAsync();
// InitButton.IsEnabled = !(ScanButton.IsEnabled = true);
}
}
else
{
// Output1.Text += "UART GATT service not found." + Environment.NewLine;
}
}
catch
{
// Output1.Text += "Error initializing UART GATT service." + Environment.NewLine;
}
}