标签：BluetoothLEAdvertisementDataSection(ArgumentException)

我正在尝试播发Eddystone信标,但是我的代码在带有ArgumentException的advertDataData.Data上失败：

Value does not fall within the expected range.

有什么想法吗？

// ...
using (var memoryStream = new MemoryStream())
{
    byte messageLengthByte = Convert.ToByte(message.Length);
    memoryStream.WriteByte(messageLengthByte);

    memoryStream.Write(message, 0, message.Length);

    fullMessage = memoryStream.ToArray();
}

while (fullMessage.Length < 32)
{
    byte[] newArray = new byte[fullMessage.Length + 1];
    fullMessage.CopyTo(newArray, 0);
    newArray[fullMessage.Length] = 0x00;
    fullMessage = newArray;
}

var writer = new DataWriter();
writer.WriteBytes(fullMessage);

var advertisementData = new BluetoothLEAdvertisementDataSection();
advertisementData.Data = writer.DetachBuffer(); // Error!
publisher.Advertisement.DataSections.Add(advertisementData);
publisher.Start();

解决方法:

最有可能您尝试容纳的字节数超出BLE数据包允许的字节数.最大大小为32个字节,但这包括：

> 3个字节用于“标志”数据部分,我认为这是必需的,并且可能由Windows 10 BLE API自动设置
>对于每个附加节,节的长度为1个字节,节的类型为1个字节

如果仅广播单个部分,则该部分的实际有效负载将剩下27个字节.

标签：win-universal-app,eddystone,c
来源： https://codeday.me/bug/20191119/2033156.html