# Contact/door sensors with reverse logic **URL:** \ **Category:** Devices\ **Created:** [October 8, 2024, 1:07pm UTC](https://community.homey.app/t/contact-door-sensors-with-reverse-logic/117664 "2024-10-08T13:07:37Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![Benny\_Ng](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/benny_ng/32/13293_2.png) [@Benny\_Ng](https://community.homey.app/u/Benny_Ng)\ **Post date:** [October 8, 2024, 1:07pm UTC](https://community.homey.app/t/contact-door-sensors-with-reverse-logic/117664/1 "2024-10-08T13:07:37Z")
Hi guys, Need some recommendation here. I’m looking for contact or door sensors that have a reverse logic function for my 2018 Homey Pro running on version 12.1.0. I know Aqara, Xiaomi and IKEA sensors have this function but they are not the most reliable in my stable of connected devices. I searched and saw that @Peter_Kawa created a reversed switch which would show the opposite is the state of a device, but that is not going to help much as I’m using zone activity in my flows. Here a few screenshots to show this function. ![IMG_3510](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/f/8/f8a355b68a080834b01702b607bc188223c3fc79.png) ![IMG_3509](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/6/6/66faa0bd087667c264b3f39579fd60193cfb0a49.jpeg) ![IMG_3511](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/4/9/49d6925c6168d2950423a6e8e350281aaa83ed3e.png) ![IMG_3512](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/0/2/02d4e14af5d5ed6358b9601ceacc8b240edd35f3.jpeg) Currently, when I browse the App Library to look for devices, there is no way to see the advance settings so I cannot determine if this function is available. I have tried Aeotec, Tuya, SmartThings which all does not have reverse logic. I wonder if Athom would consider letting users see what the advance settings are before we purchase the device. Would appreciate if someone can point me in the right direction. Thanks. ---
**Author:** ![Rmb](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/rmb/32/79135_2.png) [@Rmb](https://community.homey.app/u/Rmb)\ **Post date:** [October 8, 2024, 2:49pm UTC](https://community.homey.app/t/contact-door-sensors-with-reverse-logic/117664/2 "2024-10-08T14:49:26Z")
This sensor has it by itself by flipping a switch, see page 4. > **[70231\_-ACST-606\_KAKU\_MANUAL-NEW.pdf](https://klikaanklikuit.nl/wp-content/uploads/2023/01/70231_-ACST-606_KAKU_MANUAL-NEW.pdf)** > > 1747.17 KB ---
**Author:** ![Peter\_Kawa](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/peter_kawa/32/173848_2.png) [@Peter\_Kawa](https://community.homey.app/u/Peter_Kawa)\ **Post date:** [October 8, 2024, 3:26pm UTC](https://community.homey.app/t/contact-door-sensors-with-reverse-logic/117664/3 "2024-10-08T15:26:22Z")
Peculiar, because I always thought all contact sensors would provide for an “invert” setting. Because no one knows on what state (closed/open) users prefer to trigger the alarm? > [@Benny\_Ng](#): > > but that is not going to help much as I’m using zone activity in my flows. Hi Benny! I wondered why you think my workaround wouldn’t activate a zone. I even use a virtual contact sensor to test zone activities (when I’m too lazy to open a certain door or window). Like real contact sensors, you can disable/enably zone activity > ![1000035709](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/a/2/a2e935a9d29f185c6f4e1e93f59374f549d8adc6.jpeg) > ![1000035711](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/f/c/fc77c0d86a8b9d55812f397568f262a2432a0de4.jpeg) ---
**Author:** ![Mike1233](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/mike1233/32/20991_2.png) [@Mike1233](https://community.homey.app/u/Mike1233)\ **Post date:** [October 8, 2024, 9:01pm UTC](https://community.homey.app/t/contact-door-sensors-with-reverse-logic/117664/4 "2024-10-08T21:01:25Z")
I have a Fibaro door/windows sensor. ![image](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/a/7/a7803df0a7c9323b455ff70595bef5249c2edd40.png) ---
**Author:** ![Asterix](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/asterix/32/45768_2.png) [@Asterix](https://community.homey.app/u/Asterix)\ **Post date:** [October 9, 2024, 7:48am UTC](https://community.homey.app/t/contact-door-sensors-with-reverse-logic/117664/5 "2024-10-09T07:48:28Z")
Maybe i missunderstand, but the aeotec and the fibaro door contacts have that funktion… ![IMG_9541](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/d/3/d34a7280221e2e2b8ae7a0a042e5e3c77867a907.jpeg) ![IMG_9540](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/9/7/97bdb89c5f0c6a1496c6ebe77aa5ef04e672bd7e.jpeg)