How to detect PTT button holding on Bluetooth PTT microphone

I have a Bluetooth PTT mic (Delking PTT Bluetooth Mic)


Now I want to use it in my small PTT app in iOS, and my problem is I don't know how to detect the PTT button is hold/release, I could see Zello app works great.


Can you all have any ideas?


Thanks a lot!

I appreciate this is a really old thread, but did you find a solution in the end?

How to detect PTT button holding on Bluetooth PTT microphone
 
 
Q