Trying here
$ sudo dbus-send --system --print-reply --dest=fi.w1.wpa_supplicant1 /fi/w1/wpa_supplicant1/Interfaces/1 org.freedesktop.DBus.Properties.GetAll string:fi.w1.wpa_supplicant1.Interface
Error org.freedesktop.DBus.Error.UnknownMethod: Method "GetAll" with signature "s" on interface "org.freedesktop.DBus.Properties" doesn't exist
Trying here
$ sudo dbus-send --system --print-reply --dest= fi.w1.wpa_ supplicant1 /fi/w1/ wpa_supplicant1 /Interfaces/ 1 org.freedesktop .DBus.Propertie s.GetAll string: fi.w1.wpa_ supplicant1. Interface
Error org.freedesktop .DBus.Error. UnknownMethod: Method "GetAll" with signature "s" on interface "org.freedeskto p.DBus. Properties" doesn't exist