# \[HOW TO\] make a Nest hello doorbell z-wave trigger **URL:** \ **Category:** Tutorials\ **Tags:** z-wave, nest\ **Created:** [October 27, 2019, 1:37pm UTC](https://community.homey.app/t/how-to-make-a-nest-hello-doorbell-z-wave-trigger/19805 "2019-10-27T13:37:24Z")\ **Posts on this page:** 15\ **Page:** 1
**Author:** ![RoyWissenburg](https://avatars.discourse-cdn.com/v4/letter/r/839c29/32.png) [@RoyWissenburg](https://community.homey.app/u/RoyWissenburg)\ **Post date:** [October 27, 2019, 1:37pm UTC](https://community.homey.app/t/how-to-make-a-nest-hello-doorbell-z-wave-trigger/19805/1 "2019-10-27T13:37:24Z")
Iam trying here to explane how you can make a trigger when someone is pressing your [Nest Hello](https://store.google.com/nl/product/nest_hello_doorbell) with the use of Z-wave. What do you need. - 12VAC Relais like [this](https://www.50five.nl/omron-relais.html?gclid=Cj0KCQjwgNXtBRC6ARIsAIPP7RsugwsvQZWSJbl1Z-51EtGNZZku7tyAAEVaF48iKv9Rg8pkvhIZ1qQaAq2PEALw_wcB) - Neo Coolcam [Z-wave door sensor](https://nl.aliexpress.com/item/32705197236.html?spm=a2g0o.detail.1000023.3.661d3bdf8yLZRi) - some wiring - and a little handy. Importent thing is make sure your nest is working on 12V not 24V (12vac relais are cheaper and much better availble) First step. Breakout the (reed contact) of the Neo Coolcam Sensor. ![Knipselwse](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/f/0/f059b889fce43e5384c63dbb4e111512aa1e96d1.jpeg) ![Knipselnmnm](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/8/4/84f07de31b910754f32375da4cba3a10753f071e.jpeg) Then solder 2 wires on the the ends. ![Knipselhjjh](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/f/5/f55265f89c75221bdf516430ab5e54cf024207cb.jpeg) And make a litte hole in the cover off the sensor so that it can be plased back on top off the Battery. This one looks terrible i know just a old cover i maked as example. ![20191027_135645](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/4/f/4fea89e1d756026232a8c46e62f18bb902c7cac5.jpeg) Now you need the chime wich is deliverd with you nest Hello and you must have installed. ![Knipselchim](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/c/6/c6a4181f2db46ba1fc08925353720156dfbd19ff.jpeg) The 2 wires in the red circle must being connected to the 12vac of your relais. ![Knipseldf](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/0/a/0ac3563e3d551204a3f54f38ecefaf5cc72b19c9.jpeg) Then you conect the 2 wires from the doorsensor to the NC (normally clossed) contacts of the relais. If you wanna make it a bit nicer you put all the stuff in a nice box . ![20191027_143549](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/7/8/78248831268fee4096ab389b69fd948584548d32.jpeg) And here you go, a perfect working zwave trigger to use in Homey. SIDE NOTE. - using also a chime you wil need a relais with double contacts, as you can not use the same for both. - In europe you can use the nest hello with 12VAC instead of 24VAC ---
**Author:** ![wesley\_w](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/wesley_w/32/10127_2.png) [@wesley\_w](https://community.homey.app/u/wesley_w)\ **Post date:** [October 27, 2019, 3:34pm UTC](https://community.homey.app/t/how-to-make-a-nest-hello-doorbell-z-wave-trigger/19805/2 "2019-10-27T15:34:47Z")
Very nice idea! Make something great even greater 😁 ---
**Author:** ![MichelS](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/michels/32/2162_2.png) [@MichelS](https://community.homey.app/u/MichelS)\ **Post date:** [August 28, 2020, 7:44am UTC](https://community.homey.app/t/how-to-make-a-nest-hello-doorbell-z-wave-trigger/19805/3 "2020-08-28T07:44:29Z")
Sorry for bumping an old post. But I am going to implement this hack 😁👍. But could you help me with the relais part? The 12v is connected to pin 1 and 5? And the coolcam sensor on pin 2 and 4?! [20200828\_093843|500x500](https://community.homey.app/uploads/short-url/bq6EFRPN7FWKbmzxKMPKUySyd0P.jpeg) Thanks in advance 👍 ---
**Author:** ![MichelS](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/michels/32/2162_2.png) [@MichelS](https://community.homey.app/u/MichelS)\ **Post date:** [September 27, 2020, 11:43pm UTC](https://community.homey.app/t/how-to-make-a-nest-hello-doorbell-z-wave-trigger/19805/5 "2020-09-27T23:43:57Z")
It works 👍 Except for 1 thing. Connected it to pin 2 and 4. But it seems to work like a switch 🤔. Press the doorbell sets the state to open and on the second press it’s closed. Is it me or did I do something wrong? ![Screenshot_20200928-013245_Homey](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/3/8/389d567ab64c525386b959d58f9c8f830123816d.jpeg) [Screenshot\_20200928-013307\_Homey|269x500](https://community.homey.app/uploads/short-url/drwtwCAfD4grkb6gKc75gScckSP.jpeg) ---
**Author:** ![MichelS](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/michels/32/2162_2.png) [@MichelS](https://community.homey.app/u/MichelS)\ **Post date:** [October 5, 2020, 3:21pm UTC](https://community.homey.app/t/how-to-make-a-nest-hello-doorbell-z-wave-trigger/19805/7 "2020-10-05T15:21:16Z")
Have it fixed. It was probably the distance between te doorsensor and the closest zwave mesh device. Solved it by setting a longer ring-time. This will keep the relais open for a longer time and that makes it less sensitive for a not optimal connection. ![Screenshot_20201005-171623_Nest](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/c/4/c4887b0ffc19a174403e2afb693d17876ae279cc.jpeg) ---
**Author:** ![Wout-1976](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/wout-1976/32/175413_2.png) [@Wout-1976](https://community.homey.app/u/Wout-1976)\ **Post date:** [November 1, 2020, 8:33pm UTC](https://community.homey.app/t/how-to-make-a-nest-hello-doorbell-z-wave-trigger/19805/8 "2020-11-01T20:33:48Z")
@RoyWissenburg: heb jij ervaring met de url van Nest Hello streamen naar Homey en gebruik maken van Imagegrabber op basis van beweging door de Philips Hue outdoor sensor? ---
**Author:** ![Wout-1976](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/wout-1976/32/175413_2.png) [@Wout-1976](https://community.homey.app/u/Wout-1976)\ **Post date:** [November 1, 2020, 8:48pm UTC](https://community.homey.app/t/how-to-make-a-nest-hello-doorbell-z-wave-trigger/19805/10 "2020-11-01T20:48:13Z")
Thanks! and sorry for not asking in English 😉 ---
**Author:** ![Wout-1976](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/wout-1976/32/175413_2.png) [@Wout-1976](https://community.homey.app/u/Wout-1976)\ **Post date:** [November 1, 2020, 9:03pm UTC](https://community.homey.app/t/how-to-make-a-nest-hello-doorbell-z-wave-trigger/19805/11 "2020-11-01T21:03:08Z")
> [@RoyWissenburg](#): > > Neo Coolcam [Z-wave door sensor](https://nl.aliexpress.com/item/32705197236.html?spm=a2g0o.detail.1000023.3.661d3bdf8yLZRi) Is it possible to use an other door sensor brand/type? Can’t find this one online anymore. Only fake ones at Ali xpres. ---
**Author:** ![Martijn02091989](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/martijn02091989/32/42442_2.png) [@Martijn02091989](https://community.homey.app/u/Martijn02091989)\ **Post date:** [November 12, 2020, 6:11pm UTC](https://community.homey.app/t/how-to-make-a-nest-hello-doorbell-z-wave-trigger/19805/13 "2020-11-12T18:11:46Z")
Dear OP, Thanks for this guide! I feel this post is very under appreciated! It’s was a quick and easy “hack” to apply! ---
**Author:** ![Jeroen\_Kokhuis](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/jeroen_kokhuis/32/12592_2.png) [@Jeroen\_Kokhuis](https://community.homey.app/u/Jeroen_Kokhuis)\ **Post date:** [December 12, 2020, 1:49pm UTC](https://community.homey.app/t/how-to-make-a-nest-hello-doorbell-z-wave-trigger/19805/14 "2020-12-12T13:49:31Z")
I have the chime connected to a relay but the power remains on the relay after a press on the doorbell. Is that normal? ---
**Author:** ![Jeroen\_Kokhuis](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/jeroen_kokhuis/32/12592_2.png) [@Jeroen\_Kokhuis](https://community.homey.app/u/Jeroen_Kokhuis)\ **Post date:** [December 12, 2020, 3:49pm UTC](https://community.homey.app/t/how-to-make-a-nest-hello-doorbell-z-wave-trigger/19805/16 "2020-12-12T15:49:37Z")
I’ve connected everything according to this schema: ![Nest Hello gong2 (1)](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/1/e/1eaf5c33425e0d5753ee5ed86eb18f3e29e179f5.jpeg) And instead of the chime I’ve connected the wires to a esp8266 ---
**Author:** ![Jeroen\_Kokhuis](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/jeroen_kokhuis/32/12592_2.png) [@Jeroen\_Kokhuis](https://community.homey.app/u/Jeroen_Kokhuis)\ **Post date:** [December 12, 2020, 6:19pm UTC](https://community.homey.app/t/how-to-make-a-nest-hello-doorbell-z-wave-trigger/19805/18 "2020-12-12T18:19:05Z")
I turned thee switch to on that I’m using a chime. 833H-1A-F-C-24VDC this is the relais I’m using. ---
**Author:** ![Jeroen\_Kokhuis](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/jeroen_kokhuis/32/12592_2.png) [@Jeroen\_Kokhuis](https://community.homey.app/u/Jeroen_Kokhuis)\ **Post date:** [December 12, 2020, 6:23pm UTC](https://community.homey.app/t/how-to-make-a-nest-hello-doorbell-z-wave-trigger/19805/20 "2020-12-12T18:23:20Z")
I did and the 24 v remains after the doorbell is pressed ---
**Author:** ![Jeroen\_Kokhuis](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/jeroen_kokhuis/32/12592_2.png) [@Jeroen\_Kokhuis](https://community.homey.app/u/Jeroen_Kokhuis)\ **Post date:** [December 12, 2020, 6:48pm UTC](https://community.homey.app/t/how-to-make-a-nest-hello-doorbell-z-wave-trigger/19805/22 "2020-12-12T18:48:56Z")
I measured for 10 min. ---
**Author:** ![Jeroen\_Kokhuis](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/jeroen_kokhuis/32/12592_2.png) [@Jeroen\_Kokhuis](https://community.homey.app/u/Jeroen_Kokhuis)\ **Post date:** [December 12, 2020, 6:59pm UTC](https://community.homey.app/t/how-to-make-a-nest-hello-doorbell-z-wave-trigger/19805/24 "2020-12-12T18:59:10Z")
That’s wat I think. But I’m trying to convince the support of Google for 3 days. They’re driving me crazy. Try this…try that…and if that doesn’t work they start it al over again.