External trigger TICK event

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?