# Created a MMWave/PIR presence sensor with temp and humidity and luminance

**URL:** <https://community.homey.app/t/created-a-mmwave-pir-presence-sensor-with-temp-and-humidity-and-luminance/76714>\
**Category:** Devices\
**Created:** [February 21, 2023, 10:18am UTC](https://community.homey.app/t/created-a-mmwave-pir-presence-sensor-with-temp-and-humidity-and-luminance/76714 "2023-02-21T10:18:38Z")\
**Posts on this page:** 1\
**Showing post:** 28

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**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:** [February 24, 2023, 6:56pm UTC](https://community.homey.app/t/created-a-mmwave-pir-presence-sensor-with-temp-and-humidity-and-luminance/76714/28 "2023-02-24T18:56:09Z")

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Maybe this shows the idea:

> [@\[HOW TO\] make a Nest hello doorbell z-wave trigger](https://community.homey.app/t/how-to-make-a-nest-hello-doorbell-z-wave-trigger/19805):
>
> 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. Then solder 2 wires on the the ends.

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