An event action allows you to automatically execute a scheduled operation upon the occurrence of a periodically monitored mathematical-logical expression ("event"), without using Background Scripts.
For each event, two distinct actions can be configured, to be executed respectively on the occurrence of a rising edge and a falling edge. A front represents the variation of the logical (true / false) state of the expression value: in particular, there is a rising edge in the transition from 0 to a value different from 0 or from FALSE to TRUE, a falling edge in the case opposite to.