scripts/pi-hotspot.sh turns the receiver into a WPA2 access point via
NetworkManager (ipv4 shared mode gives the Pi built-in DHCP/NAT at
10.42.0.1), so a sender connects directly with no router in between —
which also sidesteps LAN quirks like unreachable 6to4 addresses, since
the direct link is plain private IPv4. The passphrase is generated on
first use and stored root-only in /etc/screencast-hotspot.conf;
on|off|status subcommands manage it, and off restores normal client
Wi-Fi. The hotspot owns wlan0 while active (documented). No receiver
changes were needed: it already announces on every interface.
nmcli property syntax validated against NetworkManager 1.58 with a
disposable never-activated profile; actual AP bring-up can only be
validated on the Pi.
fegger
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