optical end stop for duet wifi (3.3v)

[moris]

Hi all,

I am trying to connect this optical end stop (see attached picture),
but it won't working led state not change on the controller
the wiring is fine, I can see the state change in the optical end stop PCB

on the seller site it was operate on 2.7 - 5 v as I remember
I am sure it something about resistors
but I don't have clue how to solve it

thanks,

I need your help

[dc42]

@moris can you get a schematic of that endstop?

[moris]

@dc42 nope but I have a multimeter i can check the resistance or the volt circuit
(plugged to dc batteries or something like that )

[dc42]

@moris does the LED next to the Duet endstop connector change between off and on (or vice versa) when you trigger the endstop?

[moris]

@dc42 the default state is on , when I trigger the sensor only the let on the "End Stop" board is changed ; on the duet board the LED not changing state
also on the board itself it not changing state

how much volt trigger the IO on the board maybe it insufficient volt

I use 1[m] cable lenght

[dc42]

@moris I suspect that the wiring between the endstop and the Duet is incorrect. Please provide photographs showing how you have connected both ends of the cable.