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I'm looking for how I can find the available networks (like from nmcli dev wifi list) using the D-Bus interface.

Looking at the API I don't see any Properties or Methods. I'm wondering if it is possible to get this info from the D-Bus interface? I know I can get this from wpa_supplicant but your not able to talk to wpa_supplicant when NetworkManager is running.

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Almost all that nmcli does it achieves by using the D-Bus API. Like most NetworkManager clients.

The API documentation is here: https://developer.gnome.org/NetworkManager/stable/spec.html#dbus-interfaces

See the /org/freedesktop/NetworkManager/AccessPoint/* objects. Also, the Wi-Fi device has a property AccessPoints. See https://developer.gnome.org/NetworkManager/stable/gdbus-org.freedesktop.NetworkManager.Device.Wireless.html .

Also, you may first need to trigger a scan. See the LastScan timestamp on the device.

And finally, I don't see why you wouldn't be able to talk to wpa_supplicant, only to get the current scan list. At least if you don't interfere with what NetworkManager is doing, it should work. However, I would only talk to NM.

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