# Notify when sensors are offline/missing? **URL:** \ **Category:** Devices\ **Created:** [November 2, 2018, 5:16pm UTC](https://community.homey.app/t/notify-when-sensors-are-offline-missing/3580 "2018-11-02T17:16:33Z")\ **Posts on this page:** 9\ **Page:** 2
**Author:** ![Caseda](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/caseda/32/138695_2.png) [@Caseda](https://community.homey.app/u/Caseda)\ **Post date:** [February 24, 2020, 11:24am UTC](https://community.homey.app/t/notify-when-sensors-are-offline-missing/3580/21 "2020-02-24T11:24:13Z")
A test worked fine here on v4. During testing, did you enter the right device name too in the popup that you get just after pressing the test button. ![Screenshot_20200224-122432_Homey~2](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/5/6/569e60e29ed2061c28998a7d38504ddcb925f85c.jpeg) ---
**Author:** ![Geurti](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/geurti/32/8560_2.png) [@Geurti](https://community.homey.app/u/Geurti)\ **Post date:** [February 24, 2020, 11:39am UTC](https://community.homey.app/t/notify-when-sensors-are-offline-missing/3580/22 "2020-02-24T11:39:04Z")
That makes sense! Thanks! Only, I still get some error in the flow. As you can see in the picture: “alarm voordeur” works fine. “Rapport keuken sensor…” is turned off, and The second flow “Rapport voordeur” looks different. What does that mean? ![image](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/a/3/a3b5b1f2bc8bfa22c728ff312877f76cd540345f.jpeg) ---
**Author:** ![Caseda](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/caseda/32/138695_2.png) [@Caseda](https://community.homey.app/u/Caseda)\ **Post date:** [February 24, 2020, 11:42am UTC](https://community.homey.app/t/notify-when-sensors-are-offline-missing/3580/23 "2020-02-24T11:42:51Z")
Someone made an [explanation](https://community.homey.app/t/flow-icons-in-mobile-app/7097/9) about that some time ago ---
**Author:** ![Geurti](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/geurti/32/8560_2.png) [@Geurti](https://community.homey.app/u/Geurti)\ **Post date:** [February 24, 2020, 11:57am UTC](https://community.homey.app/t/notify-when-sensors-are-offline-missing/3580/24 "2020-02-24T11:57:39Z")
So, according to someone’s message it means the flow is disabled, right? > [@Flow icons in mobile app](https://community.homey.app/t/flow-icons-in-mobile-app/7097/9): > > **Gray play button, faded to 50% opacity.** > _Flow (trigger) disabled_ , and is _not_ able to run by pressing the play icon, because the flow **needs/uses** a value of the _trigger card_ . How can I solve this? ---
**Author:** ![Caseda](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/caseda/32/138695_2.png) [@Caseda](https://community.homey.app/u/Caseda)\ **Post date:** [February 24, 2020, 11:59am UTC](https://community.homey.app/t/notify-when-sensors-are-offline-missing/3580/25 "2020-02-24T11:59:30Z")
It is the 2nd option, so the _non_ 50% opacity. It means there is a token used of the trigger card (in this case the “name” token in the AND column). This token needs a value in this token to make the flow work. In normal operation this token wil get the value when being triggered. ---
**Author:** ![Geurti](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/geurti/32/8560_2.png) [@Geurti](https://community.homey.app/u/Geurti)\ **Post date:** [February 24, 2020, 12:11pm UTC](https://community.homey.app/t/notify-when-sensors-are-offline-missing/3580/26 "2020-02-24T12:11:17Z")
And the token is only triggered when the timer is done? Thank you guys for your patience! ---
**Author:** ![Geurti](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/geurti/32/8560_2.png) [@Geurti](https://community.homey.app/u/Geurti)\ **Post date:** [February 25, 2020, 7:44am UTC](https://community.homey.app/t/notify-when-sensors-are-offline-missing/3580/27 "2020-02-25T07:44:19Z")
![image](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/9/5/9573fcf5a178e65600b7c0686d58556d3908a2de.jpeg) ![image](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/1/7/1713befd163b7c1bbcf15e763b9935784ca2ebfa.jpeg) Hm, still something strange. One hour ago it was 7:40 o’clock. I just got 20 messages at 8:26 that the letterbox doesn’t report. If you can set 5, 10, 15 and 30 minutes it should be a bit more accurate, right? Any idea? ---
**Author:** ![Caseda](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/caseda/32/138695_2.png) [@Caseda](https://community.homey.app/u/Caseda)\ **Post date:** [February 25, 2020, 7:51am UTC](https://community.homey.app/t/notify-when-sensors-are-offline-missing/3580/28 "2020-02-25T07:51:57Z")
Hmm, that’s some odd behaviour, think that’s a Athom support case thingy. ---
**Author:** ![Geurti](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/geurti/32/8560_2.png) [@Geurti](https://community.homey.app/u/Geurti)\ **Post date:** [February 25, 2020, 8:12am UTC](https://community.homey.app/t/notify-when-sensors-are-offline-missing/3580/29 "2020-02-25T08:12:19Z")
I forgot to change one of the flows. That one was in an other folder. Now I changed it and should work fine. Thanks for help anyway. [Previous page](https://community.homey.app/t/notify-when-sensors-are-offline-missing/3580.md?page=1)