How accurately can you synchronize the time via Bluetooth?

Question

Bluetooth

Use case: several smartphones with the app and Bluetooth turned on in close proximity to each other.
It is necessary that the cameras of these devices work in a certain sequence with an interval of 200ms. Or exactly at the same time.

Is it realistic to achieve photographic synchronization speed - about 1/500 of a second? Can a protocol similar to NTP synchronize the clocks of smartphones in advance and "agree" on the exact time when to take a picture?

I would like the application to achieve the capabilities of professional camera synchronization.

Answer 1

Standard synchronization via ntp is quite a good solution. Install a synchronization program on each phone and synchronize. I do not remember exactly, but it may be necessary to root it so that it automatically synchronizes.
But I don’t think it will be accurate in 1/500, rather 1/50. Because I suspect that the photo programs themselves on phones will give a rather large error.