# Neo coolcam ds01z sensor with external antenna

**URL:** <https://community.homey.app/t/neo-coolcam-ds01z-sensor-with-external-antenna/24290>\
**Category:** Devices\
**Created:** [January 12, 2020, 11:25am UTC](https://community.homey.app/t/neo-coolcam-ds01z-sensor-with-external-antenna/24290 "2020-01-12T11:25:18Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![MFM\_Bart](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/mfm_bart/32/9492_2.png) [@MFM\_Bart](https://community.homey.app/u/MFM_Bart)\
**Post date:** [January 12, 2020, 11:25am UTC](https://community.homey.app/t/neo-coolcam-ds01z-sensor-with-external-antenna/24290/1 "2020-01-12T11:25:18Z")

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Hi all,

I have a neo coolcam ds01z doorsensor, which I want to use as a mail detector in my mailbox. The problem is, that the mailbox is a metal box so no signal are reaching my homey.

My idea is to connect a external antenna to the device outside the mailbox. But I don’t know where to connect it to the sensor.

has Anyone done this before and can put a picture of it here that can help me? or is there a easier way to do this?

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**Author:** ![Marcel\_Ubels](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/marcel_ubels/32/18860_2.png) [@Marcel\_Ubels](https://community.homey.app/u/Marcel_Ubels)\
**Post date:** [January 12, 2020, 1:39pm UTC](https://community.homey.app/t/neo-coolcam-ds01z-sensor-with-external-antenna/24290/2 "2020-01-12T13:39:25Z")

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I adjusted the doorsensor at the point where the mailbox opens. That wat it works great. I also added a motionsensor from Neo Coolcom inside the box. As soon there is mail, motion will Be detected. The distance is a problem, try to have a repeater in short distance.