Navio2 PWM Requires Constant Refresh

[igor.vereninov]

This is a safety feature.

PWM output not constant

I want to modify the Servo.cpp in the Navio2/C++/Example/Servo folder to be able initiate and set the speed of ESCs from standard input. When I set the PWM duty cycle with the set_duty_cycle command, an oscilloscope shows that the raspberry pi emits the PWM for a second and stops. When compared to a receiver I purchased from Flysky, the PWM signal is constantly emitting.