[2020] 3 way switches.

Wiring is one directional- However when objects capable of manipulating something are wired directly to one another they can both trigger what is down the line without affecting one another; It works with motion sensors and pressure plates, Not 100% sure it works with switches though as I've never personally tried with them..

But it's very important there is nothing wired between the two trigger objects, It has to go Camera->Camera->Door, Or Pressure->Pressure->Door; No relays or anything else between the cameras/pressure plates, Although there can be something between the triggers and the object being triggered.

If there IS something between the two trigger objects, then the first trigger object in line will determine if the second can even function.

Originally posted by Teresa: you can definitely open a powered drawbridge from both sides.

i'm not great with electricity but have seen it done.

You can do it with generator>motion sensor>motion sensor>drawbridge.

You can not have anything between the two motion sensors: no relays or switches. I don't know why, i just know you cant.

good luck

I just edited it into my post, but to explain more thoroughly, it's because when they're directly wired together they will pass power through as if it were one unit- But when there is a separation they're treated like two units.

So when you wire them together directly they can both function normally and either can be triggered, but when wired with a separation via relay the first instead determines if power is passed to the relay; And so in the second case the first motion sensor directly determines if the second one receives power and functions or not.

Edit: Essentially the trigger objects have two different rulesets they use; When wired to another trigger object, it passes power through unconditionally to the last trigger object in line, and all trigger objects can then act on what is down the line from them. When wired to a relay, it instead uses the ruleset where it determines if power is sent or not, and so using a relay to separate trigger objects results in the second ruleset being used.