识别 BLE 信标服务（启用通知，如果可用）

Question

刚开始使用BLE Beacons，写了一个小程序来定位信标并列出一些服务等。以下是我可以在console.log中打印的结果

BLE service: 
  Service handle: 43
  uuid: 00001800-0000-1000-8000-00805f9b34fb
    characteristic: 00002a00-0000-1000-8000-00805f9b34fb
    characteristic: 00002a01-0000-1000-8000-00805f9b34fb
    characteristic: 00002a02-0000-1000-8000-00805f9b34fb
    characteristic: 00002a03-0000-1000-8000-00805f9b34fb
    characteristic: 00002a04-0000-1000-8000-00805f9b34fb
BLE service: 
  Service handle: 44
  uuid: 00001801-0000-1000-8000-00805f9b34fb
    characteristic: 00002a05-0000-1000-8000-00805f9b34fb
      descriptor: 00002902-0000-1000-8000-00805f9b34fb
BLE service: 
  Service handle: 45
  uuid: 0000180a-0000-1000-8000-00805f9b34fb
    characteristic: 00002a25-0000-1000-8000-00805f9b34fb
    characteristic: 00002a26-0000-1000-8000-00805f9b34fb
    characteristic: 00002a29-0000-1000-8000-00805f9b34fb
BLE service: 
  Service handle: 46
  uuid: 0000c050-0000-1000-8000-00805f9b34fb
    characteristic: 0000c051-0000-1000-8000-00805f9b34fb
    characteristic: 0000c052-0000-1000-8000-00805f9b34fb
    characteristic: 0000c053-0000-1000-8000-00805f9b34fb
    characteristic: 0000c054-0000-1000-8000-00805f9b34fb
    characteristic: 0000c055-0000-1000-8000-00805f9b34fb
    characteristic: 0000c056-0000-1000-8000-00805f9b34fb
    characteristic: 0000c057-0000-1000-8000-00805f9b34fb
    characteristic: 0000c058-0000-1000-8000-00805f9b34fb
    characteristic: 0000c059-0000-1000-8000-00805f9b34fb
    characteristic: 0000c05a-0000-1000-8000-00805f9b34fb
      descriptor: 00002902-0000-1000-8000-00805f9b34fb
    characteristic: 0000c05b-0000-1000-8000-00805f9b34fb
    characteristic: 0000c05c-0000-1000-8000-00805f9b34fb
    characteristic: 0000c05d-0000-1000-8000-00805f9b34fb
BLE service: 
  Service handle: 47
  uuid: 0000c090-0000-1000-8000-00805f9b34fb
    characteristic: 0000c091-0000-1000-8000-00805f9b34fb
      descriptor: 00002902-0000-1000-8000-00805f9b34fb
    characteristic: 0000c092-0000-1000-8000-00805f9b34fb
    characteristic: 0000c093-0000-1000-8000-00805f9b34fb
    characteristic: 0000c094-0000-1000-8000-00805f9b34fb
    characteristic: 0000c095-0000-1000-8000-00805f9b34fb
BLE service: 
  Service handle: 48
  uuid: f000ffc0-0451-4000-b000-000000000000
    characteristic: f000ffc1-0451-4000-b000-000000000000
      descriptor: 00002902-0000-1000-8000-00805f9b34fb
      descriptor: 00002901-0000-1000-8000-00805f9b34fb
    characteristic: f000ffc2-0451-4000-b000-000000000000
      descriptor: 00002902-0000-1000-8000-00805f9b34fb
      descriptor: 00002901-0000-1000-8000-00805f9b34fb

这些信标基本上传输 2 个值 - 信标本身的温度和电压。当我阅读更多笔记时，我想知道是否有人可以指出我需要关注哪些 UUID/特性，以便能够获得温度和电压读数？随着我做更多的阅读和研究，如果任何有经验的开发人员可以提供一些指示，我将不胜感激？基本上我需要启用温度和电压服务的通知。我可以从 BLE 库中找出如何启用通知，但如何定位/指向正确的服务/特征/描述符等？再次感谢

我有一块 Arduino 板，可以扫描并从信标中捕获一些数据

[ADV    22587] Packet received from 50:65:83:10:E6:3A
       PAYLOAD 30 bytes
               02-01-06-1A-FF-6A-00-0F-75-E9-D5-AD-15-DF-FB-48-01-52-4E-8A-4B-B9-3D-0F-00-1E-3B-9E-FF-2C
          RSSI -68 dBm
      ADV TYPE Connectable undirected
 MAN SPEC DATA 6A-00-0F-75-E9-D5-AD-15-DF-FB-48-01-52-4E-8A-4B-B9-3D-0F-00-1E-3B-9E-FF-2C

[SR     22618] Packet received from 50:65:83:10:E6:3A
       PAYLOAD 22 bytes
               12-09-69-57-45-45-43-41-52-45-20-54-65-6D-70-20-50-61-6C-02-0A-00
          RSSI -68 dBm
      ADV TYPE Connectable undirected
 COMPLETE NAME Temp mini Sensor
  TX PWR LEVEL 0

关于我应该如何从这里继续的任何指示？试图掌握它......只是那个难以捉摸的线索......我想我会理解发生了什么:)

Answer 1

蓝牙 Gatt 服务仅允许您在蓝牙外围设备上读取和写入特征。通常外围设备的设计是为了将特定模式写入特定特征来控制外围设备将做什么。

以您的问题为例，将某些模式写入某些特征可能会控制是否根据超过阈值或定期间隔通知连接的蓝牙中心温度和/或电压的变化。

要了解的关键是您配置蓝牙外围设备的方式完全取决于其系统设计。这不是标准的。您确实需要制造商提供的文档来告诉您如何执行此操作。如果没有此类文档，您基本上是在对蓝牙外围设备进行逆向工程。

更好地回答您的问题以识别此信标设备的制造商和型号可能会有所帮助。如果您在制造商的网站上没有看到任何文档，那么制造商可能会直接回答这个问题，或者对设备进行逆向工程的其他人会这样做。