Lights not working in Homey since last night (WiFi & Zigbee)

Questions & Help
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1

Does anyone have the same problem? Since last night, the lights don’t work anymore. I can’t switch them on or off with Homey. It doesn’t matter if they are app-connected with WiZ or connected via Zigbee none of them can be switched in the app anymore. Can anyone help me with this? They all get the same error message: timeout after 10000ms

2

The information in your post is limited. Some general things to try:

  • Restart the app on your Homey that controls the lights;
  • Restart your Homey;
  • Since you are also referring to WiFi: was there a change in your WiFi network configuration? Like a change in IP address or change in WiFi channnel (that also may affect Zigbee devices, as the frequencies on which they communicate might overlap)?
  • Restart your router and WiFi access point(s).
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3

All of the things you mentioned I have already tried. The only thing I can still try is restarting my router, but I doubt that this will be the solution. If anyone has other solutions, I would be glad to hear them.

4

Take Homey off power for 5 minutes, and replace its power supply and cable.

5

I’m not sure if this is related but I noticed last night and still this morning that my lighting flows all have “card unavailable”. I also couldn’t control any lights.

I primarily use Philips Hue but have one Wiz light too. I’ve also noticed that the Homey app is incredibly slow when using outside my house (often timing out when trying to look at a flow), I’ve never seen it this bad.

Things I’ve tried:

  • Reboot Homey Pro
  • Restart Philips Hue app
  • Reinstall Philips Hue app (this allowed me to control the lights remotely again)
  • Reboot router

Still seeing “card unavailable” for lighting related flows.

6

(also to @Arnoud_Fleer) This indicates app problems.
Possibly it’s the IPv6 bug:
If Homey firmware is lower than v12.4.5, update firmware;

Screenshot_20250829_014808_Chrome
Screenshot_20250829_014808_Chrome1080×943 116 KB

(the description is not complete: or when installed apps disappear should be included).

if it’s v12.4.5 or up:
disable IPv6 on on your router and see if this fixes the issues.

If true: please do report to homey.app/support the IPv6 bug is not resolved

#IPv6 bug

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7

Thanks, Peter. I’ll have to try this in around 48 hours when I’m home next.

8

Whatever changed, everything works again now that I got home from work. So I think something rebooted, and it works again. Thanks a lot to everyone who helped me find a solution.

9

I’ve just checked in the Homey app again and it’s all working again. My flow cards are displaying correctly again.

I haven’t changed anything in the time between my last post and now so perhaps it was something Athom fixed on their backend?