Similar issue here.
I have a detached garage and am trying to get zwave signal to the garage so i can have a door sensor, garage relay, and switches.
My closest switch is right at the back door (inside) and I put a Leviton DZS15 there. It faces perpendicular to the door as follows:
The garage switch (also leviton DZS15) is along the garage wall facing the house and the switch is parallel to the wall.
All of my electrical boxes are metal as per code where I am.
The distance is about 20 feet.
When I bring my hub using a long ethernet cable right to the back door and point the front of the hub at the garage, the garage switch works. If I move the hub across the main floor 25 feet to the front of the house and point the front of the hub (and the internal zwave antenna) the opposite direction from the garage, it still works. If I move the hub to its normal location in my media room (different floor) and run the zwave repair to attempt to get the garage switch to use the back door switch as a relay, it does the fail to update mesh/fail to update route thing. It won’t work if the hub is on a different floor prior to doing the repair - this is a problem as if the hub isnt where it’s located, I lose access to my front door switch.
I’m assuming I have an issue where the switches aren’t actually doing a great job repeating because they are inside metal electrical boxes in the wall.
I have no other idea how to beam a signal to my garage though.
Any ideas? I’m hoping perhaps once some zwave plus switches make their way to Canada they might get me better rage, but I’m curious if this is truly a range issue or a mesh issue.