Smart Bulb Tapo L535(E/B) | Constant Disconnect and Reconnect from WiFi

Smart Bulb Tapo L535(E/B) | Constant Disconnect and Reconnect from WiFi

Smart Bulb Tapo L535(E/B) | Constant Disconnect and Reconnect from WiFi
Smart Bulb Tapo L535(E/B) | Constant Disconnect and Reconnect from WiFi
2023-12-30 02:21:27 - last edited 2024-08-13 07:38:59
Model: Tapo L535E  
Hardware Version: V3
Firmware Version: 1.0.8 Build 230810 Rel.140202

I just received 8 of these new bulbs and am having a very difficult time keeping them responding via Apple Home or the Tapo App. They either react very slowly or will say "no response".

 

I have mostly idevice homekit switches and excellent wifi coverage. Everything else in the house responds instantly.

 

I have been going through all of my network setting trying to figure out what is happening with no luck. All of the bulbs will just randomly change to "no response" and then eventually re-appear. I can watch them come in and out of existence using the "Discovery" app on the iphone. This is an mDNS scanner. The bulbs will show up in matter and then disappear. Many times when they disappear they will also not be controllable via the Tapo app.

 

Is this a known issue? These are the only matter devices I have. Everything else is homekit certified.

 

I have gone through every sort of troubleshooting imaginable and the bulbs are still randomly not responding. I am very experienced with networking and IoT devices. I can see the bulbs connected to my Netgear WAC510 access points with good signal. They are on a 2.4GHz only SSID with the rest of my IoT devices. This SSID is part of my normal LAN network and not segregated. My setup has been working flawlessly with over a dozen other Homekit devices for years. My Apple Hub is a brand new AppleTV 4k Ethernet.

 

I am looking at my Netgear Insight logs and the L535 Bulbs are constantly disconnecting and reconnecting to different Wireless Access Points. I see the mac address move from the nearest base station with a good signal to a base station further away with a poor signal. The logs are full of disconnect and re-connect notices multiple times per minute. I assume this is why my Apple Home app just shows them all randomly going No Response and then back online.

 

I have three wireless access points to cover my entire house and garage. According to the logs it appears the light bulbs cannot pick where to stay connected to.

 

Although I had tuned my access point power levels to ensure I do not have too much signal overlap in my house, I decided to change each access point to full power to see if the Tapo devices would stay stuck to a base station better. There was a definite improvement in response time once I increased all the radios to full power. The Tapo devices will still randomly show "no response" but they will work within 5 - 20 seconds if I wait in the home app. The Netgear Insight logs still show the Tapo bulbs disconnecting and reconnecting several times a minute for no apparent reason. I will see an RSSI of -57 and the bulb will disconnect and reconnect over and over again. This is happening even with signal strengths better than -50.

 

It seems to me like there might be a firmware issue with these bulbs in an environment with multiple access points all broadcasting the same SSIDs. The bulbs need to be a little more "sticky". As far as I can tell the bulb is initiating the disconnect and reconnect from WiFi for no apparent reason. I assume this problem would not exist in a house with only one wireless access point.

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#1
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1 Accepted Solution
Re:Smart Bulb Tapo L535(E/B) | Constant Disconnect and Reconnect from WiFi-Solution
2024-08-13 07:38:54 - last edited 2024-08-13 07:38:59

If your Tapo L535 experiences frequent WiFi disconnection issues similar to the symptoms in this thread, check the following suggestions.

 

 

  • Case Two. Smart bulb managed by a third-party Matter platform Apps.

Check the quality and signal strength of the router WiFi. Observe whether other devices on the same network experience the same WiFi disconnection phenomenon.

Suggestions in this article apply to this scenario as well. What should I do if my Tapo smart devices keeps losing connection or going offline?

 

 

开明If the problem remains, please share the following details when reporting the issue so we can offer more targeted suggestions.

1. What platform are you using to manage the Tapo L535? Tapo App or a third-party Matter platform app?

2. Model of your router. If you own a big network, please describe your network topology as clearly as possible. 

3. Detailed description of the problem you've encountered.

4. Troubleshooting steps you've tried. 

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Re:Smart Bulb Tapo L535(E/B) | Constant Disconnect and Reconnect from WiFi
2024-01-10 07:35:09

  @cwagz 

 

Thank you for your feedback. The tech team was made aware of this situation, they will likely reach out to you via email to continue to troubleshoot this case. Please check your email box later and confirm.

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Re:Smart Bulb Tapo L535(E/B) | Constant Disconnect and Reconnect from WiFi
2024-02-06 00:59:22

I have the extract the same issue. I bought 3 bulbs but they keep disconnecting after about a day. I have them paired via Apple Home and additionally to Home Assistant. They come back online only after powering them off and on again.
 

I tried doing full factory reset: next day they disconnected again.

 

I tried disconnecting them from the internet and only using local LAN - and for a day or two it seemed to help. But then they again got disconnected.

 

I'm pretty sure the firmware is broken. I love the brightness but these are currently totally unusable. I hate to return them.

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Re:Smart Bulb Tapo L535(E/B) | Constant Disconnect and Reconnect from WiFi
2024-02-06 06:25:06 - last edited 2024-02-06 06:26:35

The same for me. Useless for now...

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#5
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Re:Smart Bulb Tapo L535(E/B) | Constant Disconnect and Reconnect from WiFi
2024-02-06 10:01:52

  @alizbazar @Michael162534 

 

What router are you using? Please describe your network topology clearly.

 

And what's the hardware and firmware version of your Tapo L535?

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Re:Smart Bulb Tapo L535(E/B) | Constant Disconnect and Reconnect from WiFi
2024-02-06 10:26:55 - last edited 2024-02-06 10:45:21

  @Wayne-TP 

 

Router is a BananaPi BPi R3 with OpenWRT 23.05.

 

Topology: Router (BananaPi BPi R3) ->via LAN-> Switch (FS S3900-48T4S) ->via LAN-> AccessPoint (BananaPi BPi R3) ->via WiFi WPA3-> L535e

 

Tapo L535e:

Hardware Version 3.0

Firmware 1.0.8 230810 Rel. 140202


I also have three other Tapo L535e with the same Problem.

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#7
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Re:Smart Bulb Tapo L535(E/B) | Constant Disconnect and Reconnect from WiFi
2024-02-06 22:08:35

  @Wayne-TP 

 

the test firmware I was provided seems to have fixed the issue. 

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#8
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Re:Smart Bulb Tapo L535(E/B) | Constant Disconnect and Reconnect from WiFi
2024-02-07 09:41:18

@alizbazar @Michael162534 

 

To help with this case efficiently, a specialist would like to follow it up via email. Kindly check your inbox later and confirm.

Landscape Mode - Tapo App for PadShare Your Pet Story. Win Free Tapo Care!Smart Action 2.0 Explore and meet the next level home automation.
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#9
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Re:Smart Bulb Tapo L535(E/B) | Constant Disconnect and Reconnect from WiFi
2024-02-07 18:07:41

Thanks! Replied to the email.

 

My setup below: 

 

Bulb (L535E) firmware is 1.0.8 Build 230810 Rel. 140202

 

Xfinity XB6 router sitting right next to the bulb. Wifi signal quality is great.

 

Looking forward to testing the new firmware!

 

Best,

-Albert

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#10
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Re:Smart Bulb Tapo L535(E/B) | Constant Disconnect and Reconnect from WiFi
2024-02-24 14:26:03 - last edited 2024-02-24 14:28:08

@Wayne-TP 

 

I encountered the same issue as @cwagz described.

 

Everything was working fine one day, but the next day, it became chaotic with all the L535E lights randomly disconnecting, and HomeKit kept telling me that nothing was responding.

 

I factory reset all the lights, and now I'm facing two new issues:

  • Firstly, I set them up in the Tapo app, but now I can't add them to my HomeKit app. It keeps showing "Connecting...", "Setting up..." for 5 minutes, then I receive an error message "Can't pair the device." (screenshots)
  • Secondly, some lights exhibit strange behavior when turning off. When I tap "power off" in the Tapo app, the light dims smoothly until it reaches a low level (around 10%). It doesn't completely turn off (0%) until I turn it back on (100%) and manually decrease it to 1%. Then, when I turn it off again, it goes completely dark.

 

My setup :

 

- Apple TV 4K (3rd generation) | OS version : 17.3 (24K646)

- Apple HomePod (2nd generation) | OS version : 17.3 (24K646)

- Apple HomePod mini (2023) | OS version : 17.3 (24K646)

 

- Living room : L535E | Firmware : 1.0.8 Build 230810 Rel.140202 | Harware : 3.0

- Kitchen : L535E | Firmware : 1.0.8 Build 230810 Rel.140202 | Harware : 3.0

- Bedroom : L535E | Firmware : 1.0.8 Build 230810 Rel.140202 | Harware : 3.0

 

- Router : GL.iNet GL-SFT1200 / Opal (soon upgrading to the Beryl AX)

 

Best Regards,

-Max

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#11
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Re:Smart Bulb Tapo L535(E/B) | Constant Disconnect and Reconnect from WiFi
2024-02-27 06:31:58

  @Royalphax 

 

Do you have a 2.4GHz only SSID? It happened to me once when have the smart connect (which merges two frequencies into one) enabled on my Deco router. 

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#12
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