How to judge the completion of a broadcast data transmissionn?

[wyang0824]

Want to realize a function: stop broadcasting after a broadcast, update the broadcast content, and then start broadcasting again after the specified timeout. How can I judge the end of a broadcast and how to realize it with radio event?

[wyang0824]

Added: My app also has scanning capabilities, how do I tell if a radio event is a scan event or a broadcast event？