I want to use Smartthings as a security device in an amusements arcade. The site has WIFI but it requires sign in through Web portal. Will the device work or will it fail because it requires Web browser sign in? I plan on connecting the hub directly to the unit via ethernet as suggested.
You would likely need to create an exemption for the ST hub in whatever device controls that captive portal.
EDIT: This assumes the captive portal applies to the wired ports as well. If not, then you should be fine.
If I understand your question, the SmartThings hub does not have a Wi-Fi antenna. It must be cabled directly to your ethernet router. (That’s not just a suggestion, it’s a requirement.) So the Wi-Fi password is irrelevant to it.