Thanks. I've tried following some of the suggestions on that article, and it now paired successfully. I switched off the "Smart channel" selector for 2.4GHz on my router (even though it said it was...

I've got a new Tapo C410 kit and I'm pairing it for the first time. The app on my iPhone pairs with the Tapo's WiFi network, and then I select my home WiFi network and password for the final step....