# IR Detector - the project that grew and grew

**URL:** <https://discourse.nodered.org/t/ir-detector-the-project-that-grew-and-grew/4738>\
**Category:** Share Your Projects\
**Created:** [10 November 2018 11:00 UTC](https://discourse.nodered.org/t/ir-detector-the-project-that-grew-and-grew/4738 "2018-11-10T11:00:25Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![dynamicdave](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/dynamicdave/32/96_2.png) [@dynamicdave](https://discourse.nodered.org/u/dynamicdave)\
**Post date:** [10 November 2018 11:00 UTC](https://discourse.nodered.org/t/ir-detector-the-project-that-grew-and-grew/4738/1 "2018-11-10T11:00:25Z")

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[The project that 'grew and grew'.](http://resources-area.co.uk/node-red-flows/it_grew_and_grew.pdf)

Here's a link to an instruction sheet, for my IoT students, on how to interface an InfraRed (IR) detector to a WeMos D1 Mini..

Note: This exercise uses a WeMos D1 Mini, Node-RED and MQTT (mosquitto) and of course an IR detector.  
The project grew into using a RPi-camera to FTP images to a server and a dashboard to display those images.

I hope you enjoy reading this as much as I enjoyed writing it.

Regards from David.

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**Author:** ![BartButenaers](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/bartbutenaers/32/10476_2.png) [@BartButenaers](https://discourse.nodered.org/u/BartButenaers)\
**Post date:** [10 November 2018 14:08 UTC](https://discourse.nodered.org/t/ir-detector-the-project-that-grew-and-grew/4738/2 "2018-11-10T14:08:14Z")

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Hey David,

Do you know whether it is possible to implement some kind of pet-detection, i.e. ignore the cat passing by? Or is that something that should be build-in in the IR sensor you buy?

Thanks!  
Bart

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**Author:** ![dynamicdave](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/dynamicdave/32/96_2.png) [@dynamicdave](https://discourse.nodered.org/u/dynamicdave)\
**Post date:** [10 November 2018 17:06 UTC](https://discourse.nodered.org/t/ir-detector-the-project-that-grew-and-grew/4738/3 "2018-11-10T17:06:04Z")

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Hi Bart,  
The IR Detector I purchased said (in the spec) that it can ignore ""body  
heat"" from pets.  
There are some DIL switches inside the unit that can adjust thresholds,  
etc..  
I've not got any pets, so can't verify that claim.

Cheers from David.