The "Can't Detect Device" error probably points to a range or connectivity issue.

If you're seeing Can't Detect Device in your Vera app, first try to Update Neighbor Nodes. This is a useful feature in Vera's interface that allows you to refresh the connections between hub and devices, and may help Vera find the most efficient route to your 4-in-1 Sensor. Here's how to Update Neighbor Nodes.

1. Log into your Vera Dashboard on the desktop interface (not the app)
2. From the Dashboard, select Settings
3. Select Z-Wave Settings
4. Click on the Advanced tab
5. At the bottom of the advanced tab, you'll see a GO button to run the Update Neighbor Nodes. The process can take several minutes or over an hour depending on the size of your Z-Wave network.

If Updating Neighbor Nodes doesn't help, try bringing the 4-in-1 Sensor within direct range of Vera. Make sure the battery is inserted correctly, the cover is tightly closed, then exclude it  and re-include it. If the sensor connects and stays connected this time around, it's possible the previous location is out of Vera's range or there are too many interferences around.

Another thing to try is to exclude and re-include the 4-in-1 Sensor from the installation location. It's possible that Vera hasn't found the best route to communicate with the device. This can sometimes be caused by including a device near the hub but then moving it away to be installed. 

We also recommend checking out this short troubleshoot guide about the optimal installation location and how Z-Wave range works.  

If you're still experiencing issues after trying all the above, please let us know! Our team is ready to help.