This is a problem with many (but not all) TP-Link Kasa devices on the latest Asus firmware as well as with the latest Merlin firmware (which uses the Asus wireless code as-is). You can work around this problem by setting Wireless > General > Band: 2.4 GHz > Wireless Mode: Legacy

 

Note that this mode may slow down your other non-Kasa devices on 2.4 GHz, so YMMV. You just have to test and see if it's a good work around for you or not.

@ElmerFudd 

 

Great to see more people having this issue so I feel less crazy lol, I'll monitor your thread as well :)

 

For me running the router with 2.4GHz Legacy didn't work for me.

 

So far again after more than 24 hours.. all my tp-link work great with the latest firmware from asus (January 5th) for my router AX58U.

Not sure if it's just a coincidence but for further testing, I will flash to another firmware and see if I can recreate the issue again and I Will come back to the latest firmware see if it works again.

 

Hey guys, I appreciate this thread. I recently upgraded to an ASUS RT-AX88U. I had 0 issues with the 10 HS200s and 5 HS103/105s on my ISP provided AP/Router. Once i added the AX88U, my kasa switches all drop off regularly. I also had a weird freak issue where almost every single switch and plug factory reset to an orange/green flashing light on it and had to be re-set up. I also set Static IPs for all switches/plugs. I downgraded the router firmware to 3.0.0.4.386_44266 (from july) from whatever the most current is. We will see if this solves the issue. Currently everything is connected and functional as expected. If this continues I'm not sure what else to do other than remove them all and sell them to have some funds to put toward a set that's compatible with my router.

@Solla-topee 

 

I have the same issue.  The TP-Link smart dimmers are disconnecting every minute or so.

 

Router mode:  Asus GT-AX11000

 

Router firmware:  Merlin: 386.4

 

Not a mesh system.

 

- Does the issue start since any router firmware update:  no

- Model & hardware version of kasa device HS220 (12 of them)  HW = 1.0.  FW = 1.5.11
- Mac address of the problematic kasa devices  (please share MAC by private message)
- Does it happen on certain kasa unit or all kasa devices:  The smart dimmers  HS200 only so far.
- Is there any Red/ Green/Flashing Green WiFi led on plug when issue happens? One of the dimmer HS220 switches the wifi light was solid red some days ago.  Restarted it and no more red.  Two others occassionally flash green wifi light.
- How often does kasa become local only or not respond  All the time.
- How did you make kasa work again at that moment, like reboot kasa/ reboot router/ factory reset kasa and set up kasa on the app?  Rebooted cable modem, rebooted cable router, Makes no difference.  Disconnect and reconnect about every minute.

- For Asus , try to check Router Log when issue occurs and the router log if possible 

 

Log sample by PM.

 

Let me know if you need anything more.

 

Thank you

Hi Everybody, I have the same problem with my week old ASUS RT-AX88U

 

For about 4 years everything was working rock solid with my Fritz!Box 7490 and my TP-Link switches HS110 hardware v1 and v2 (8 switches)

Probably because both router and switches are quite old already.

 

A week ago I bought an Asus router RT-AX88U to use it as router with the same fritz modem as bridge.

Since the begining my some of my TP-link switches disconnected each minute or so making my Home Assistant installation very unreliable.

 

As said in a post above, the workaround that worked for me is setting the router in legacy mode. But my wifi 2.4ghz speed go down to 10mbps, so its painful.

In the logs I notice that the power save flag is not set when in legacy mode.

 

Second workaround that works with latest firmware and makes less frequent disconnections, each 2 hours or so: (Got them from forums and from the asus website)

 

1. Go to [Wireless] > [General] page. Turn off [Enable Smart Connect] and select the [Band] for your network devices.

2. Disable [802.11ax / WiFi 6 mode]

3. Disable [Wi-Fi Agile Multiband]

4. Disable [Target Wake Time]

5. Disable [Protected Management Frames]

6. Beacon Interval: 1000

(noticed in the logs that power save flag is set) maybe that is causing the issue?

 

 @Solla-topee 

- Router Model: ASUS RT-AX88U

Router Firmware: Tested so far (with same results):

    ASUS 3.0.0.4.386 45934

    ASUS 3.0.0.4.386 45898

    Merlin 386.4_0

Is it a Mesh system e.g. router + extenders?  Just router

- Does the issue start since any router firmware update? Since I got it
- Model & hardware version of kasa device .e.g : HS110 hardware v1 and v2
- Mac address of the problematic kasa devices  (please share MAC by private message) will be sent in PM
- Does it happen on certain kasa unit or all kasa devices:  Some, not all
- Is there any Red/ Green/Flashing Green WiFi led on plug when issue happens? I saw once orange flashing, other times I think they stayed green
- How often does kasa become local only or not respond: with default router settings, each minute or less. With tweaked settings shared above, each 2 hours or so
- How did you make kasa work again at that moment, like reboot kasa/ reboot router/ factory reset kasa and set up kasa on the app? nothing, it reconects again by itself

- For Asus , try to check Router Log when issue occurs and the router log if possible. will be sent in PM

Thank you

Had no issues with anything but the Kasa smart devices after the new router was installed. I have not had a single issue since the firmware downgrade and in fact google home integration is much snappier and responsive now. If it stays like this, I am happy with the equipment.

@ElmerFudd 

 

You may be right, but for what it is worth, in addition to my TP-Link HS220 disconnects, I have two Honeywell WiFi thermostats that are disconnecting every 4-5 minutes on the new Merlin firmware 386.4 installed Sunday, January 9.

 

Their connections were stable before I flashed the new Asus firmware.

 

And, also FWIW, there are a lot of "reconditioned / refurbished" HS220 dimmers for sale on Amazon and ebay.