TI中文支持网我想問一下是否可以向Resolvable Private address 的Host 發定向廣播作回連?
我發現配對後的開頭15分鐘是可以, 但過了一段時間又不可以..
我明白Host 是會在5~ 15分鐘間改變random address.
如要在Host改變random address 後, 做定向廣播, 我應如何處理? 謝謝
Viki Shi：
没有做过类似的实验，不过找到些相关文档供参考：
Devices may perform something known as “directed advertising.” In directed advertising, the advertising packets indicate both the MAC address of the device doing the advertising and the MAC address of the device being advertised to. This is like sending an invitation to a specific device with which you’ve had a previous relationship saying, “Hey, if you’re there, please reconnect to me!” The MAC address used by the advertising device is a random address if LE privacy is in use but for this situation, it’s a special type of private address called a “reconnection address.” Reconnection addresses differ from the private addresses used in other circumstances in that, they do change but not by a timer. Instead, a user’s actions, like switching the device on and off or the establishment of a new connection, triggers the change of address. In order to provide manufacturers more options, Bluetooth 4.2 now allows private reconnection addresses to also change to a new, random address using the same timer-based mechanism so manufacturers have complete control over how their product behaves with respect to privacy and private addresses.blog.bluetooth.com/bluetooth-technology-protecting-your-privacy
dev.ti.com/…/privacy.html
