蓝牙GATT UUID [英] Bluetooth GATT UUID

问题描述

我正在尝试构建一个使用BluetoothLE的android应用.在教程中，他们使用128位UUID，但我只有16位UUID. 我必须使用服务UUID和Bluetooth Base创建一个新的128位UUID.

I'm trying to build an android app that uses the BluetoothLE. In tutorials they use a 128bit UUID but I only have the 16 bit UUID. I have to create a new 128 bit UUID using the service UUID and the Bluetooth Base.

示例:

• 警报通知服务UUID(16位)=> 0x1811
• 蓝牙基本UUID(128位)=> 00000000-0000-1000-8000-00805F9B34FB

通过合并这两个UUID，我们收到...

By combining those two UUIDs, we receive...

• 警报通知服务UUID(128位)=> 00001811-0000-1000-8000-00805F9B34FB

有适当的方法吗?

推荐答案

我使用这个:

public class BLEUtils {

    public static final long BT_UUID_LOWER_BITS = 0x800000805F9B34FBl;
    public static final long BT_UUID_UPPER_BITS = 0x1000l;
    public static final long BT_CCCD_SHORT_UUID = 0x2902l;
    public static final UUID BT_CCCD_UUID = get16BitBTUUID(BT_CCCD_SHORT_UUID);

    public static UUID get16BitBTUUID(long uuid) {
        return new UUID(BT_UUID_UPPER_BITS + (uuid << 32), BT_UUID_LOWER_BITS);
    }
}

您的示例看起来很理智.其他设备可以正确识别吗?

Your example looks sane. Is it recognized properly by other devices?

评论中要求的反向操作为:

The reverse operation requested in the comment would be:

public static long getShortUuid(UUID uuid) {
    long result = uuid.getMostSignificantBits();
    result = result - BT_UUID_UPPER_BITS;
    result = result >> 32;
    return result;
}

我没有测试.

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