Bid is proxy, until req specs settled.
>Access to the Internet will not always be present, anyone connecting to the captive portal will not be allowed access to the Internet at any time, <
To clarify: The user will _NOT_ be allowed access to internet, as user will have no possibility to "login" on the landing page.
_But_ the Pi still is connected to internet ?
_OR_ is PI (temp.) disconnected from the internet completely ?
(I also did "Local Hotspots" without internet, like mediaservers).
>The landing page content and feedback mechanism will be provided when the work is awarded.<
Sorry, this can not work. I.e. your landing page has to adhere to certain restrictions, to work correctly (esp. on iOS). To be verified beford final bid. Same for feedback mechanism, as it will influence amount of implementation work.
Feel free to privide an NDA. Not the first for me.
Statistics etc. to be TXed upstream using vpn, mqtt, http-POST ... Up to you.