How to make Zabbix send messages on a schedule?

Question

Zabbix

The purpose of the task is to periodically schedule a notification once a day or several times that Zabbix is ​​on guard and, in principle, working, and so that it does not happen that an accident occurs, and Zabbix is ​​in suspended animation for some reason and did not send anything. The method is SMS, but this is not the point. I can't figure out how to approach the issue at all.

Answer 1

Here the developer offers an idea:
Those. an action in the crown once a day, and a trigger for the absence of this action within 23 hours.