BPI-R3 mini station mode

1.How to switch the ap mode to sta mode, the document does not mention, try to switch through the route setting interface, is invalid

2.How to scan the surrounding wifi by command? try the iw dev *** scan command, and an error message is displayed: nl80211 not found

try the iwlist rax0 scanning command:The Interface doesn’t support scanning: Not supported is displayed

note:nmcli not the command