# How check last sensor communication **URL:** \ **Category:** Questions & Help\ **Created:** [December 10, 2019, 10:53am UTC](https://community.homey.app/t/how-check-last-sensor-communication/22212 "2019-12-10T10:53:57Z")\ **Posts on this page:** 13\ **Page:** 1
**Author:** ![Magic](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/magic/32/12395_2.png) [@Magic](https://community.homey.app/u/Magic)\ **Post date:** [December 10, 2019, 10:53am UTC](https://community.homey.app/t/how-check-last-sensor-communication/22212/1 "2019-12-10T10:53:58Z")
Hi, i use zigbee and z-wave device. Sometimes happens, that sensor (temp or other) stop communication. If i have flow depending on the value of that sensor, its big problem, because value is from last comm (x days old) and I don’t know about it. If possible set any system last respond sensor check? and send notification allert. For example i want check about 10 aqua temp and other. Thx all ---
**Author:** ![Osorkon](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/osorkon/32/43026_2.png) [@Osorkon](https://community.homey.app/u/Osorkon)\ **Post date:** [December 10, 2019, 11:08am UTC](https://community.homey.app/t/how-check-last-sensor-communication/22212/2 "2019-12-10T11:08:38Z")
I think you can use the Heimdall App, right @DaneedeKruyff ---
**Author:** ![MathiasJ](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/mathiasj/32/9544_2.png) [@MathiasJ](https://community.homey.app/u/MathiasJ)\ **Post date:** [December 10, 2019, 11:37am UTC](https://community.homey.app/t/how-check-last-sensor-communication/22212/3 "2019-12-10T11:37:42Z")
Maybe When =\> Devices =\> A device hasn’t reported could work? ---
**Author:** ![Magic](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/magic/32/12395_2.png) [@Magic](https://community.homey.app/u/Magic)\ **Post date:** [December 10, 2019, 12:04pm UTC](https://community.homey.app/t/how-check-last-sensor-communication/22212/4 "2019-12-10T12:04:49Z")
thx, but dont look like support aqara temp sensor… and i cant see no sensor in app ---
**Author:** ![Magic](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/magic/32/12395_2.png) [@Magic](https://community.homey.app/u/Magic)\ **Post date:** [December 10, 2019, 12:05pm UTC](https://community.homey.app/t/how-check-last-sensor-communication/22212/5 "2019-12-10T12:05:29Z")
thx, i test it, but i dont know how add to notification, which sensor have problem ---
**Author:** ![Jodex](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/jodex/32/17762_2.png) [@Jodex](https://community.homey.app/u/Jodex)\ **Post date:** [December 10, 2019, 12:30pm UTC](https://community.homey.app/t/how-check-last-sensor-communication/22212/6 "2019-12-10T12:30:24Z")
Hi Magic, There is a few ways to do it. Either by making a flow with; When: A device hasn’t reported And: If you want to specify a zon or name Then: Either a notification or push. You can choose to specify name and zone of the sensor. Example; ![image](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/3/4/347943c4aef077f13232f6eb116b3ce0a84e291d.jpeg) Or you could create a two-part flow which sets a timer and a variable each time the sensor value changes and a second flow that sends a push when the timer reaches zero. ---
**Author:** ![Magic](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/magic/32/12395_2.png) [@Magic](https://community.homey.app/u/Magic)\ **Post date:** [December 10, 2019, 12:33pm UTC](https://community.homey.app/t/how-check-last-sensor-communication/22212/7 "2019-12-10T12:33:07Z")
thx! i test it ---
**Author:** ![Magic](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/magic/32/12395_2.png) [@Magic](https://community.homey.app/u/Magic)\ **Post date:** [December 10, 2019, 12:46pm UTC](https://community.homey.app/t/how-check-last-sensor-communication/22212/8 "2019-12-10T12:46:44Z")
ok, so when i want identify, which sensor dont respond, i need flow for each sensor ? ---
**Author:** ![Jodex](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/jodex/32/17762_2.png) [@Jodex](https://community.homey.app/u/Jodex)\ **Post date:** [December 10, 2019, 12:52pm UTC](https://community.homey.app/t/how-check-last-sensor-communication/22212/9 "2019-12-10T12:52:56Z")
You dont need a seperate flow for each sensor, you can specify under AND the name or the zone of the sensor. Just remeber to make the cards as “or” so they will work one by one and not as a whole. Ex; When: A device hasn’t reported And: (name or zone) is Outside or is Thermometer1 or is Thermometer living room. I dont know if your using the browser or your phone but pull the cards apart to make them as “Or”. ---
**Author:** ![MathiasJ](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/mathiasj/32/9544_2.png) [@MathiasJ](https://community.homey.app/u/MathiasJ)\ **Post date:** [December 10, 2019, 12:52pm UTC](https://community.homey.app/t/how-check-last-sensor-communication/22212/10 "2019-12-10T12:52:58Z")
![IMG_20191210_134905](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/d/8/d8665e593323addb02c053cc1280f38064c38dc2.jpeg) ---
**Author:** ![Magic](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/magic/32/12395_2.png) [@Magic](https://community.homey.app/u/Magic)\ **Post date:** [December 10, 2019, 1:05pm UTC](https://community.homey.app/t/how-check-last-sensor-communication/22212/11 "2019-12-10T13:05:11Z")
thx, i set this, and i wait for report 😃 ---
**Author:** ![Magic](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/magic/32/12395_2.png) [@Magic](https://community.homey.app/u/Magic)\ **Post date:** [December 10, 2019, 2:20pm UTC](https://community.homey.app/t/how-check-last-sensor-communication/22212/12 "2019-12-10T14:20:06Z")
works, i got name power plug which is day without communication, but temp, which has last statu before 7hours dont say me. Is possible do click od periodically report with last communication time? Maybe email, or other. ---
**Author:** ![Jodex](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/jodex/32/17762_2.png) [@Jodex](https://community.homey.app/u/Jodex)\ **Post date:** [December 10, 2019, 2:48pm UTC](https://community.homey.app/t/how-check-last-sensor-communication/22212/13 "2019-12-10T14:48:37Z")
Show me the flow and I can help you adjust if needed. But one thing worth to remeber is the sensor wont report that it hasn’t reported if you set the flow to 6h but the sensor been unresponsive for 7h. Its possible to make a flow that sends status reports periodically and send it by push notification to your phone. I’ve seen some e-mail apps in the Homey store but I haven’t used any off them so cant say how they work but perhaps worth a try. Otherwise its like I wrote in my earlier comment; > Or you could create a two-part flow which sets a timer and a variable each time the sensor value changes and a second flow that sends a push when the timer reaches zero. Would look something like this: Flow1 ![image](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/e/5/e5802bfd6454327a8b3d1db1161641fd4d561ab2.jpeg) Flow2 ![image](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/f/0/f0289602421644d0ac8651c5d9047367609438a9.jpeg)