title: How to communicate with a device without known wifi password
body: <p>When configuring my baby camera, I just needed to press a button on the camera, and then my Android phone detected the camera, after which I could configure the camera with my Wifi settings.</p>
  <p>I want to do something simular with a hobby project, but I have no idea how this works. How does the camera communicate with my phone? I wasn't asked to enable my Bluetooth, but it was enabled, so maybe it's using Bluetooth, but I don't think so.</p>
  <p>Is there any other way, besides Bluetooth, to do this?</p>