Hello
I have 5 hubs, 3 HE, 1 ST and 1 Iris, I have 2 separate zigbee meshes with HE, 2 wifi routers, at least 2.4GHz has channels so it's ok, but Z-Wave doesn't have channels, so having minimum 2 meshes, it will have interference?
Per this picture, I want both hubs with separate Z-Wave meshes, they are both with separate zigbee meshes already.
Thanks
You posted this pic earlier in another thread.. gave me chills. I may need to fire up my old ST and Hue hubs to feel special again!
A Hubitat Staff member said they have 7 Zigbee meshes going on in their home.
I have 3 ZWave meshes now, but mine are slightly further apart.. I try to keep them arms length apart (3ft) to reduce interference. Obviously far enough apart is far enough, but the real question is how close? I'm gonna try to stick with my 3ft minimum, simply because my arm is always with me. 
Ahh thats where my anxiety started.. Thanks! 
I would think there would have to be some sort of interference unless Z-Wave automatically switches to less noisy channels?
So, 3ft separation? My wife will kill me if I get one more inch in that wall 
horizontally works too
Draw an imaginary 3ft circle. Is there any place on that circle that wouldn't lower WAF?
Maybe LOWER on the wall like down almost to the floor?
But the question is not IF there can be interference, but how well they are handling it. Packets that fail due to interference just get retried. Obviously that takes away radio time and increases the queue depth. Small number of devices OR a really low usage and then dropped packets plus the random backoff would slow you mesh down. Are you seeing that?
Not yet, I have just one z wave turned on, in my picture the top hub is my main box, the bottom hub is for Xiaomi, I wanted to move my Schlage z wave lock to the xiaomi hub and maybe add one or 2 iris zwave repeaters just for the lock.
The reason is I'm tired of the automation delay of my front door, delay because when you open the lock it floods the mesh then the zwave switch to turn on the porch lights takes delay because the flood, if I leave the lock open and test the automation it works perfectly. The door has a konnected contact sensor. Other door automation with same setup works perfectly all the time but this door doesn't have a zwave lock.
I did not received any reply if I will have interference so I just added 2 Iris z wave repeaters and the lock.
The lock is working perfectly. I will test further both meshes.
I just spent some time digging into the ITU standard G.9959, which appears to be the standard for Zwave (effectively), and with regards to the question about interference....I think, the three hubs near each other will be fine, as long as they are all in the same Zwave Network (rather using the same HomeID in their transmission headers).
Based on my reading, transmission seems contention based. In other words if a hub or node has a message, it checks the medium, and if it's available (no other device is transmitting), transmits. If it's not, it waits. So. Technically no two devices in your Zwave network will transmit at the same time. So three hubs side by side, won't likely interfere with each other. However, they may saturate each other's front ends, and there is no real benefit outside of WAF to have them co-located from a radio or topology perspective.
Spreading out the hubs would seem to be a better solution from a network perspective.
If they're truly separate Zwave network (different HomeID's), they still wouldn't likely interfere with each other, but they wouldn't repeat each others messages, and aside from increasing the total number of Zwave nodes you had in operation (hubs & devices), I don't see much benefit to two networks in the same home (but I don't know your use case!)
]Just my .02 tho.
S.
Thanks, the reason for a second mesh is I'm tired of my Schlage lock flooding the z wave network, I have an automation when I open the door with a contact sensor, it will turn on the lights of the porch, removing the lock from the mesh the automation works perfectly and instantly, but with this lock in the mesh, because must unlock the door before it can be opened, the lock floods the mesh causing a delay in the automation of the light, it is a z wave switch, and WAF is very impacted every morning when she goes to work in the dark with the light turning on 8 seconds later.
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