Repurposing Contact Sensor as Arrival Sensor?

[jlv]

You could ask @scunny if they still have any of the extra Iris fobs left:

Presence FOB

They actually are now being made by Aeon Labs along with the other ST items but they come and go inventory wise. If you need an immediate work around I have some brand new Iris V1 key fobs that will work fine. $20 plus shipping. Bonus, they have 2 programmable buttons available for other rules. [Iriskeyfob]

This post points to the problems (will it reconnect to the mesh, battery life) you will encounter:

Zigbee sensor in a car

That's a good question. I think it depends on the stack in the end-device. @iharyadi gave a really good explanation on the Home Assistant community:

And this thread might give you ideas:

ZigBee Arrival Sensor For Car

Hello Everyone, I make a DIY Arrival Sensor for all of us. This is inspired from using ST Arrival Sensor in our car. The ST sensor has been discontinued. This is one of the reason I have to make my own. In addition, I make them because there are some weakness using the original ST arrival sensor in our cars. I apologized for a long information. I would like to have the first post for all of us to get the latest information about this sensor. The topic may get very large. I want to pr…