Hi @David-TP,

The devices that didn't move effortlessly to another Deco are an OnePlus Nord and an OnePlus7T.
Both connected with IEEE80211_MODE_11AC as far as I see.

I hope this helps.

Best regards, AMMO

I contacted TP Link support on Wednesday July 30. They checked several settings and changed some.
It should be better now but I still notice that mobile phones sometimes have problems with seamless mesh.

We found out that my OnePlus 7T does not support certain functions of Deco’s mesh. By now we both have a new phone at home, the OnePlus 13R. This one should definitely support that functionality. And yet I still often see a message saying the internet (wifi) is unstable, and I also often see that it takes a very long time (or does not happen at all) before the phone switches its wifi connection to the nearest node (AP).

For example, when I sit in the garden 10 meters from the garage (with a Deco X50 outdoor installed there), my phone stays connected to the Deco X50 in the meter cupboard for a long time. That one is much further away and the signal is clearly weaker. As a result, I have slow internet on my phone for quite a while, even though a faster and better connection is right there.

I no longer understand why I spent €300 on new Deco APs when the feature I bought them for simply does not work properly. I do not think this is a seamless mesh network and band steering does not seem to work well enough.

I also had problems with my previous wifi network because my lawn mowing robot kept losing its wifi connection. It still does, even though coverage and signal strength are really good.

The manufacturer of the mower advises me to give the robot a fixed IP address in the wifi network, because that way it will lose settings less quickly when switching from node to node. But in the Deco app I cannot find any option to assign a fixed IP address to a device.

In general I find the configuration options in the app very limited! Maybe there is still another solution for this? Anyone?

  @Ammo69 

For the lawn mowing robot I would suggest two things:

1. In Deco app enable IoT network with its default only 2.4GHz enabled band. Connect robot to IoT network. 

It may be possible your robot can't handle well dual band (both 5GHz and 2.4GHz on same SSID). Moving it to 2.4GHz only SSID might help.

2. If that is not enough, here is how you could assign fixed IP address to robot, but I am not sure if it'll fix the issue with it: https://www.tp-link.com/en/support/faq/1795/

Unfortunately, some older devices just can't handle WiFi mesh, because they expect single WiFi router in the house.

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To have devices such as smartphones roam faster between Deco nodes, do this:

1. Make sure Fast Roaming is enabled under More/Advanced

2. Configure Main Network to broadcast 5GHz only. This can be set under WiFi Settings/"2.4GHz & 5GHz Network"/Advanced. There, under Band uncheck 2.4GHz and then go back until Deco app offers you to save that change.

If you did that change correctly, open WiFi Settings again and you should now see "5 GHz Network" 

This change should make devices switch from Deco node with weak WiFi signal to Deco node with stronger signal faster. 

  @Alexandre. 

I have set up the robotic lawnmower in the Deco app so that it can only connect to the 2.4 network. Is that okay?

Following your instructions, I have now assigned a fixed IP address to the robotic lawnmower. I'll just wait and see how it goes now.

I'm not too keen on disabling the 2.4 network because a lot of smart devices that only support 2.4 are connected to that SSID. I would then have to migrate all of them to the IoT network. Migrating all my lights can only be done by resetting them, which means I'd lose all the settings. It would simply take too much time to do it all over again. So I'll try this solution first. Thanks again!

  @Ammo69 

Here is relatively easy process to migrate all your smart devices to IoT Network. Suppose, your Main Network has SSID MyHome. These will be steps:

1. Rename Main Network SSID to (for example) MyHome_5G. I would also recommend to change Main Network password, but this is optional.

This will make all devices at your home to disconnect from WiFi.

2. Connect smartphone that has Deco app on it to WiFi SSID MyHome_5G and make it forget SSID MyHome. 

3. Through Deco app, enable IoT Network with SSID MyHome and make sure it has same password Main Network had before Step 1. Everything at your house should seamlessly and automatically reconnect to IoT Network.

4. Now, for devices that will benefit from WiFi5/WiFi6, such as smartphones, repeat for each of them Step 2: Connect device to WiFi SSID MyHome_5G and make it forget SSID MyHome.

5. Finally, disable 2.4GHz band on your Main Network.

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This process does not require any changes in smart devices settings. I used it myself when I upgraded my Deco mesh from older Deco hardware which does not have IoT Network option to X50-PoE Decos that do.

  @Alexandre. Thanks for your helpful step-by-step plan. I'll do this later this week.