This works very well so far, but I would like that if a "false" comes from the ping node only once and if the second time "false" the message should be sent to others.
How do I have to change the Node function so that I am not notified immediately but only after the second time "false".
You could use a function node and keep track of fail count per IP. If fail count is 2, forward the message. You will need to store the"memory" object in context to remember the ping count