Hi
I have installed HA on my NUC. Debian os and hassio install on top. I have wifi problems with my nuc with high latency 200ms and some packets drops. It dosent help if I move the nuc next to the ap. Signal is good -52 db. No other devices have problem on the wifi. Suggestions appreciated!
Use a wired connection for your home automation server 
Old house with no cat-cables installed in the walls. I need the HA to be in a central place for best zwave coverage.
No, you just need it near a zwave device. Thatâs kind of the point of zwave. The mesh capabilities of it.
You are wrong, the zwave hub should be as central as it can for best performance.
If you say so.
The same can be said about your Wireless.
Well as I said its the same problem with the nuc next to the AP.
If you can put it next to the AP just use ethernet!
Wireless congestion it sounds like.
Wireless is for convenience, not for reliability or performance.
You should take the advice, which you have asked for in the OP, from people who have more knowledge than you.
Z-Wave creates a mesh network. It doesnât need to be central, that is entirely the purpose of a mesh network - wired and wireless extension of the network.
âIts wireless mesh networking technology enables any node to talk to adjacent nodes directly or indirectly, controlling any additional nodes. Nodes that are within range communicate directly with one another. If they arenât within range, they can link with another node that is within range of both to access and exchange informationâ.
âDevices can communicate to one another by using intermediate nodes to actively route around and circumvent household obstacles or radio dead spots that might occur in the multipath environment of a house.[26] A message from node A to node C can be successfully delivered even if the two nodes are not within range, providing that a third node B can communicate with nodes A and Câ. Z-Wave - Wikipedia
Get your NUC on Eth and your latency problems will disappear. If you want to run the machine that controls your entire home automation system, using WiFi, then expect problems
I put it next to the ap just for troubleshooting. Its not next to ap now, but still good signal -52db. I think its something with debian/drivers and was hoping for advice on that.
Just google, here is one example:
Putting the hub in a corner of the basement might be convenient, but its a terrible idea for Z-Wave. The hub is the most important node in the network and should have the best location possible. While Z-Wave is a mesh network and can route or hop thru other nodes in the mesh, each hop is a significant delay and chokes up the network with more traffic. Ideally the hub should reach 90% of the nodes in your Smart Home without relying on routing. If the hub has Wifi then putting it in a central location is easy, you just need a wall outlet to plug it in. I have my hub hung off the back of a TV cabinet in roughly the middle of the first floor of my home.
Running a SERVER (which is what HA is) off wireless is worse than not having a zwave hub in a central location. You should never run a server off WLAN.
Cool story, enjoy continued problems then.
I agree with you. But all of my other devices have low latency and no problems on my wifi. Its not typical that something on your wifi have 200ms +. So something is wrong on the nuc.
Do you see the same issue with ethernet on the NUC?
Try network âpingâ tool from terminal - it should be less than 10ms over wifi, and less than 1ms with wired ethernet.
200ms+ sounds like a bad setting maybe?
You are wrong, the zwave hub should be as central as it can for best performance.
Do you have a source for this? Iâm using Zigbee which is similar and I have my hub right at one end of the house
Then go to the debian forums. Sheeesh.
Just some guys blog post he linked too. Doesnât seem to understand mesh networks.
Wireless ethernet is a strange beast at times, some times if your too close to the ap you can get reflection interference.
Even if you have a great ap all the devices take it in turn to talk (kinda) so the more devices you have the more latency.