@smigaud it's possible that retailers sit on old stock. Is this a Flic 1? If so, these have smaller batteries than Flic 2, and also consumes more power...

Here is a detailed source page on how to play Spotify through Sonos
If you have issued when playing Spotify on Sonos, you can refer to this article.
First of all, you maybe try to uninstall and install the Spotify app to see whether the issue could be fixed well.

Hi Matti,
the best adhesive would be the 3M Scotch Restickable Dot.

You can find it on Amazon and also in Office Depots.

It's reusable and washable

Yes, after initial setup of hub using phone, you don't need the phone.

To find out how the request the Flic hub makes, you can use a service such as requestb.in or postman.

Hi. Flic's responsibility stops when reaching IFTTT's servers, so if you have any issues with Yeelight through IFTTT, you'd better take that up with IFTTT or Yeelight.

Oh easy! Thank you

Thank you for the swift answer!

Ok, always active is good news. But a scan interval of 1.28 seconds sounds a bit worrying. Does that mean that a) the latency is always 1.28 seconds or b) that the latency is at least 1.28, but can vary depending on how long from an interval I happen to press the button? This is important. If a), then I can learn to compensate for this, to always time the sound effects 1.28 seconds from the press of the button. Not fun, but doable. If b), how long could the variable times be? This makes a huge difference for the usage I had in mind.

Also worth mentioning is that this is a Flic 1. Are there any differences for Flic 2.0?

Two short red lights means the battery is under 2.65 Volt.

Is it possible to achieve this with the Flic 2 Hub somehow? It would be a very nice feature to have one (1) button to find multiple phones in the house.

Hi. For these kinds of questions, reach out to https://flic.io/support so that we can help you diagnose the issue.

Nowadays, the Spotify app is available for Android devices also. You can directly download it on the Google Store. After that, you can play Spotify playlists online via the Shuffle Play mode. With a free Spotify Premium, it has many limitations to listen to playlists.
If you'd like to get a better listening experience, the best way is to upgrade to Spotify Premium.
If there is something wrong happened, and Spotify not working well via the app, you can try to use AudFree Spotify Music Converter to download Spotify songs as local files after that you can still listen to Spotify playlist on Android via any music player instead of using the Spotify app.