蓝牙核心规范制定了两种不同的UUID,一种是基本的128位UUID,一种是代替基本UUID的16位UUID。 所有的蓝牙技术联盟定义UUID共用了一个基本的UUID:0x0000xxxx-0000-1000-8000-00805F9B34FB
为了进一步简化基本UUID,每一个蓝牙技术联盟定义的属性有一个唯一的16位UUID,以代替上面的基本UUID的‘x’部分。例如,心率测量特性使用0X2A37作为它的16位UUID,因此它完整的128位UUID为:0x00002A37-0000-1000-8000-00805F9B34FB
虽然蓝牙技术联盟使用相同的基本UUID,但是16位的UUID足够唯一地识别蓝牙技术联盟所定义的各种属性。蓝牙技术联盟所用的基本UUID不能用于任何定制的属性、服务和特性。对于定制的属性,必须使用另外完整的128位UUID。
SoftDevice 根据蓝牙技术联盟定义UUID类似的方式定义UUID:先增加一个特定的基本UUID,再定义一个16位的UUID(类似于一个别名),再加载在基本UUID之上。这种采用为所有的定制属性定义一个共用的基本UUID的方式使得应用变为更加简单,至少在同一服务中更是如此。
使用软件nRFgo Studio非常容易产生一个新的基本UUID:
例如,在LED BUTTON示例中,采用0x0000xxxx-1212-EFDE-1523-785FEABCD123作为基本UUID。
蓝牙核心规范没有任何规则或是建议如何对加入基本UUID的16位UUID进行分配,因此你可以按照你的意图来任意分配。
例如,在LED BUTTON示例中,0x1523作为服务的UUID,0x1524作为LED特性的UUID,0x1525作为按键状态特性的UUID
在BLE开发中,经常会用到BLE GATT UUIDS的查找,包含Service、Characteristic、Descriptor。 这里整理了一些Bluetooth SIG定义的标准UUID。以便查找使用,以android为例,见static content:
另外,也可以从官网直接查询,下面是Declarations 及Service、Characteristic、Descriptor的links:
https://www.bluetooth.com/specifications/gatt/declarations/
https://www.bluetooth.com/specifications/gatt/services/
https://www.bluetooth.com/specifications/gatt/characteristics/
https://www.bluetooth.com/specifications/gatt/descriptors/
// Sample Services.
attributes.put("0000180d-0000-1000-8000-00805f9b34fb", "Heart Rate Service");
attributes.put("0000180a-0000-1000-8000-00805f9b34fb", "Device Information Service");
// Sample Characteristics.
attributes.put("00002a37-0000-1000-8000-00805f9b34fb", "Heart Rate Measurement");
attributes.put("00002a29-0000-1000-8000-00805f9b34fb", "Manufacturer Name String");
// GATT Services
attributes.put("00001800-0000-1000-8000-00805f9b34fb", "Generic Access");
attributes.put("00001801-0000-1000-8000-00805f9b34fb", "Generic Attribute");
// GATT Declarations
attributes.put("00002800-0000-1000-8000-00805f9b34fb", "Primary Service");
attributes.put("00002801-0000-1000-8000-00805f9b34fb", "Secondary Service");
attributes.put("00002802-0000-1000-8000-00805f9b34fb", "Include");
attributes.put("00002803-0000-1000-8000-00805f9b34fb", "Characteristic");
// GATT Descriptors
attributes.put("00002900-0000-1000-8000-00805f9b34fb", "Characteristic Extended Properties");
attributes.put("00002901-0000-1000-8000-00805f9b34fb", "Characteristic User Description");
attributes.put("00002902-0000-1000-8000-00805f9b34fb", "Client Characteristic Configuration");
attributes.put("00002903-0000-1000-8000-00805f9b34fb", "Server Characteristic Configuration");
attributes.put("00002904-0000-1000-8000-00805f9b34fb", "Characteristic Presentation Format");
attributes.put("00002905-0000-1000-8000-00805f9b34fb", "Characteristic Aggregate Format");
attributes.put("00002906-0000-1000-8000-00805f9b34fb", "Valid Range");
attributes.put("00002907-0000-1000-8000-00805f9b34fb", "External Report Reference Descriptor");
attributes.put("00002908-0000-1000-8000-00805f9b34fb", "Report Reference Descriptor");
// GATT Characteristics
attributes.put("00002a00-0000-1000-8000-00805f9b34fb", "Device Name");
attributes.put("00002a01-0000-1000-8000-00805f9b34fb", "Appearance");
attributes.put("00002a02-0000-1000-8000-00805f9b34fb", "Peripheral Privacy Flag");
attributes.put("00002a03-0000-1000-8000-00805f9b34fb", "Reconnection Address");
attributes.put("00002a04-0000-1000-8000-00805f9b34fb", "PPCP");
attributes.put("00002a05-0000-1000-8000-00805f9b34fb", "Service Changed");
// GATT Service UUIDs
attributes.put("00001802-0000-1000-8000-00805f9b34fb", "Immediate Alert");
attributes.put("00001803-0000-1000-8000-00805f9b34fb", "Link Loss");
attributes.put("00001804-0000-1000-8000-00805f9b34fb", "Tx Power");
attributes.put("00001805-0000-1000-8000-00805f9b34fb", "Current Time Service");
attributes.put("00001806-0000-1000-8000-00805f9b34fb", "Reference Time Update Service");
attributes.put("00001807-0000-1000-8000-00805f9b34fb", "Next DST Change Service");
attributes.put("00001808-0000-1000-8000-00805f9b34fb", "Glucose");
attributes.put("00001809-0000-1000-8000-00805f9b34fb", "Health Thermometer");
attributes.put("0000180a-0000-1000-8000-00805f9b34fb", "Device Information");
attributes.put("0000180b-0000-1000-8000-00805f9b34fb", "Network Availability");
attributes.put("0000180d-0000-1000-8000-00805f9b34fb", "Heart Rate");
attributes.put("0000180e-0000-1000-8000-00805f9b34fb", "Phone Alert Status Service");
attributes.put("0000180f-0000-1000-8000-00805f9b34fb", "Battery Service");
attributes.put("00001810-0000-1000-8000-00805f9b34fb", "Blood Pressure");
attributes.put("00001811-0000-1000-8000-00805f9b34fb", "Alert Notification Service");
attributes.put("00001812-0000-1000-8000-00805f9b34fb", "Human Interface Device");
attributes.put("00001813-0000-1000-8000-00805f9b34fb", "Scan Parameters");
attributes.put("00001814-0000-1000-8000-00805f9b34fb", "Running Speed and Cadence");
attributes.put("00001816-0000-1000-8000-00805f9b34fb", "Cycling Speed and Cadence");
attributes.put("00001818-0000-1000-8000-00805f9b34fb", "Cycling Power");
attributes.put("00001819-0000-1000-8000-00805f9b34fb", "Location and Navigation");
// GATT Characteristic UUIDs
attributes.put("00002a06-0000-1000-8000-00805f9b34fb", "Alert Level");
attributes.put("00002a07-0000-1000-8000-00805f9b34fb", "Tx Power Level");
attributes.put("00002a08-0000-1000-8000-00805f9b34fb", "Date Time");
attributes.put("00002a09-0000-1000-8000-00805f9b34fb", "Day of Week");
attributes.put("00002a0a-0000-1000-8000-00805f9b34fb", "Day Date Time");
attributes.put("00002a0c-0000-1000-8000-00805f9b34fb", "Exact Time 256");
attributes.put("00002a0d-0000-1000-8000-00805f9b34fb", "DST Offset");
attributes.put("00002a0e-0000-1000-8000-00805f9b34fb", "Time Zone");
attributes.put("00002a0f-0000-1000-8000-00805f9b34fb", "Local Time Information");
attributes.put("00002a11-0000-1000-8000-00805f9b34fb", "Time with DST");
attributes.put("00002a12-0000-1000-8000-00805f9b34fb", "Time Accuracy");
attributes.put("00002a13-0000-1000-8000-00805f9b34fb", "Time Source");
attributes.put("00002a14-0000-1000-8000-00805f9b34fb", "Reference Time Information");
attributes.put("00002a16-0000-1000-8000-00805f9b34fb", "Time Update Control Point");
attributes.put("00002a17-0000-1000-8000-00805f9b34fb", "Time Update State");
attributes.put("00002a18-0000-1000-8000-00805f9b34fb", "Glucose Measurement");
attributes.put("00002a19-0000-1000-8000-00805f9b34fb", "Battery Level");
attributes.put("00002a1c-0000-1000-8000-00805f9b34fb", "Temperature Measurement");
attributes.put("00002a1d-0000-1000-8000-00805f9b34fb", "Temperature Type");
attributes.put("00002a1e-0000-1000-8000-00805f9b34fb", "Intermediate Temperature");
attributes.put("00002a21-0000-1000-8000-00805f9b34fb", "Measurement Interval");
attributes.put("00002a22-0000-1000-8000-00805f9b34fb", "Boot Keyboard Input Report");
attributes.put("00002a23-0000-1000-8000-00805f9b34fb", "System ID");
attributes.put("00002a24-0000-1000-8000-00805f9b34fb", "Model Number String");
attributes.put("00002a25-0000-1000-8000-00805f9b34fb", "Serial Number String");
attributes.put("00002a26-0000-1000-8000-00805f9b34fb", "Firmware Revision String");
attributes.put("00002a27-0000-1000-8000-00805f9b34fb", "Hardware Revision String");
attributes.put("00002a28-0000-1000-8000-00805f9b34fb", "Software Revision String");
attributes.put("00002a29-0000-1000-8000-00805f9b34fb", "Manufacturer Name String");
attributes.put("00002a2a-0000-1000-8000-00805f9b34fb", "IEEE 11073-20601 Regulatory Certification Data List");
attributes.put("00002a2b-0000-1000-8000-00805f9b34fb", "Current Time");
attributes.put("00002a31-0000-1000-8000-00805f9b34fb", "Scan Refresh");
attributes.put("00002a32-0000-1000-8000-00805f9b34fb", "Boot Keyboard Output Report");
attributes.put("00002a33-0000-1000-8000-00805f9b34fb", "Boot Mouse Input Report");
attributes.put("00002a34-0000-1000-8000-00805f9b34fb", "Glucose Measurement Context");
attributes.put("00002a35-0000-1000-8000-00805f9b34fb", "Blood Pressure Measurement");
attributes.put("00002a36-0000-1000-8000-00805f9b34fb", "Intermediate Cuff Pressure");
attributes.put("00002a37-0000-1000-8000-00805f9b34fb", "Heart Rate Measurement");
attributes.put("00002a38-0000-1000-8000-00805f9b34fb", "Body Sensor Location");
attributes.put("00002a39-0000-1000-8000-00805f9b34fb", "Heart Rate Control Point");
attributes.put("00002a3e-0000-1000-8000-00805f9b34fb", "Network Availability");
attributes.put("00002a3f-0000-1000-8000-00805f9b34fb", "Alert Status");
attributes.put("00002a40-0000-1000-8000-00805f9b34fb", "Ringer Control Point");
attributes.put("00002a41-0000-1000-8000-00805f9b34fb", "Ringer Setting");
attributes.put("00002a42-0000-1000-8000-00805f9b34fb", "Alert Category ID Bit Mask");
attributes.put("00002a43-0000-1000-8000-00805f9b34fb", "Alert Category ID");
attributes.put("00002a44-0000-1000-8000-00805f9b34fb", "Alert Notification Control Point");
attributes.put("00002a45-0000-1000-8000-00805f9b34fb", "Unread Alert Status");
attributes.put("00002a46-0000-1000-8000-00805f9b34fb", "New Alert");
attributes.put("00002a47-0000-1000-8000-00805f9b34fb", "Supported New Alert Category");
attributes.put("00002a48-0000-1000-8000-00805f9b34fb", "Supported Unread Alert Category");
attributes.put("00002a49-0000-1000-8000-00805f9b34fb", "Blood Pressure Feature");
attributes.put("00002a4a-0000-1000-8000-00805f9b34fb", "HID Information");
attributes.put("00002a4b-0000-1000-8000-00805f9b34fb", "Report Map");
attributes.put("00002a4c-0000-1000-8000-00805f9b34fb", "HID Control Point");
attributes.put("00002a4d-0000-1000-8000-00805f9b34fb", "Report");
attributes.put("00002a4e-0000-1000-8000-00805f9b34fb", "Protocol Mode");
attributes.put("00002a4f-0000-1000-8000-00805f9b34fb", "Scan Interval Window");
attributes.put("00002a50-0000-1000-8000-00805f9b34fb", "PnP ID");
attributes.put("00002a51-0000-1000-8000-00805f9b34fb", "Glucose Feature");
attributes.put("00002a52-0000-1000-8000-00805f9b34fb", "Record Access Control Point");
attributes.put("00002a53-0000-1000-8000-00805f9b34fb", "RSC Measurement");
attributes.put("00002a54-0000-1000-8000-00805f9b34fb", "RSC Feature");
attributes.put("00002a55-0000-1000-8000-00805f9b34fb", "SC Control Point");
attributes.put("00002a5b-0000-1000-8000-00805f9b34fb", "CSC Measurement");
attributes.put("00002a5c-0000-1000-8000-00805f9b34fb", "CSC Feature");
attributes.put("00002a5d-0000-1000-8000-00805f9b34fb", "Sensor Location");
attributes.put("00002a63-0000-1000-8000-00805f9b34fb", "Cycling Power Measurement");
attributes.put("00002a64-0000-1000-8000-00805f9b34fb", "Cycling Power Vector");
attributes.put("00002a65-0000-1000-8000-00805f9b34fb", "Cycling Power Feature");
attributes.put("00002a66-0000-1000-8000-00805f9b34fb", "Cycling Power Control Point");
attributes.put("00002a67-0000-1000-8000-00805f9b34fb", "Location and Speed");
attributes.put("00002a68-0000-1000-8000-00805f9b34fb", "Navigation");
attributes.put("00002a69-0000-1000-8000-00805f9b34fb", "Position Quality");
attributes.put("00002a6a-0000-1000-8000-00805f9b34fb", "LN Feature");
attributes.put("00002a6b-0000-1000-8000-00805f9b34fb", "LN Control Point");