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External trigger TICK event

Hello!
I am developing an independent AR application. It works with sensors, tracking device positions, keying, compositing, playback.
Rendering takes place in UE4. To get the image, I wrote a plugin on C ++
I have a problem with different rendering times.
This is because the lack of synchronization of both programs in frequency and in ticks.
Can I make UE do global tick only on my command?
Do something like software genlock?