Tuya/Smart life: "Please use designated APP to login"

Hardware
1

Due to the ongoing cold spell the humidity in my house fell to very low values, approaching 30% rH. So I bought a humidifier (Stadler Form Karl big). When it arrived, I realized it had a smart function via an app, which turns out to be SmartLife/Tuya based.

When I tried to set up the humidifier via the Tuya/TuyaLocal app, I tried the SmartLife/QR code setup route. I can scan the QR code HomeAssistant shows, but then I get “Please use the designated APP to log in” when hitting the confirmation button in the Stadler branded SmartLife app. The same happens with the “fresh login” option.

Is this a common thing with these devices now? I’dreally like to avoid using yet another app with yet another account, especially since the built-in Hygrometer is next to useless when determining whether the humidifier needs to run (advertised for 150 square meters of coverage, and I can confirm that it brought humidity up considerably running in constant mode across three floors of my mostly open plan house), so the built-in auto mode is useless.

Any hints? Do I really need to go the route of trying to retrieve the device identifier with some command line tool to get this integrated?

2

Yes. You signed up for Tuya, you onboard using their magic code.
No different for Matter, so don’t get frustrated.

3

When it asks to use an app then you set it up via the app first then sign into the smartlife/tuya intergration in HA when not trying to faff about with trying to convert it to local only until that breaks.

Smartlife and Tuya share the same login info so its a pick your poison deal with the branding at that point, hell the apps are exactly the same other than again branding.

4

Yeah, its set up in the SmartLife app (branded to the seller of the device), which is where I get the error message about having to use the designated app after scanning the QR code and hitting the button to confirm I want to login with Home Assistant.

5

try the unbranded version, the branded version may have issues.

6

Same here. Devices are set up in generuc Tuya Home app. I use it to scan QR code and recieve the same message. Tried Smart Life app, same thing.