is there a possibility to use the HTTP-request without an refresh interval if a want to
get a stats of an value by HTTP.
For some applications i do not need an polling in a defined sequence, would be
good enough to do an HTTP request if a rule demands the value.
Polling the value means traffic on the Network that may cause problems.
Issue here: I want to get (get) an status of an IO-channel of my LOGO-PLC to judge
whether a switch condition is correct or not, a check is just needed if the switch got actuated. Polling all 500 ms works, but i hope to find a solution w.o. idle traffic on the Network.
So, best case: