Hi Victor, there is a much higher probability of a useful response if, instead of just posting an entire script for people to look through, you include in your post more detail of what you have done to send each sort of pulse, and what the exact issue is.
i.e. rather than just describe it as “pulses are sent in a random way”, say exactly what you expected to happen, and exactly what does actually happen, and how this differs for the two sorts of pulse.
Supplement the explanation with snippets of specific code extract. To include readable code within your post:
Good luck.