Given these are yours to command, only you know your requirements and could create a script or app to report in on a schedule of your choosing. Be aware you are asking a very well worn question so not much has changed in over a decade. That is, you detect a machine going down by its silence or it not checking it. We know that PING can work when the machine is up or down so that's no test at all except of the network connectivity.

Time to write a script that does what you need.
Bob