How to use access keys with iButton (legacy)

In the tab "1wire" can be found the "Reader" element, which is used to control access to the system (by iButton or RFID). Normally, when the keys are not connected, the "Reader" element is in the 'not connected' state. When a valid key is connected to the reader (stored in the database access control data, read - Access control (legacy)), the element goes into a 'normal' state, until the key is turned off. When a not invalid key is connected to the reader, the element goes into a 'alarm' state.

The use of "iButton" to switch the triggers in a cyclic pattern Normal-> Alarm-> Normal → ...

For this mode, you need to spread over time the processing of conflicting logic to activate the trigger and disable it again. To do this we introduce an auxiliary trigger with logic to handle it, in the same way as described here - How to use "Trigger". This trigger (helper_trigger) will be activated when you connect a valid key (iButton able to 'normal'), and will automatically turn off after 5 seconds.

Create the main trigger (main_trigger) and logic schemes for processing. Note that the logic circuits are activated only when the auxiliary trigger (helper_trigger) is disabled, and when triggered the circuit helper_trigger is immediately converted to an 'alarm' state. Thus main_trigger will be triggered only once per 5 seconds, and so will not be a conflict between the logic to turn on and to turn off the main trigger.