Hi, all, sorry to bother you again.     I still cannot make wifi on my OPi Plus2 work. The following are the results of ifonfig and iwlist scan .     and my /etc/network/interfaces is as follows:       What's in file /etc/wpa_supplicant/wpa_supplicant.conf : network={ ssid="xxxxx" psk="yyyyy" } and I'm sure the SSID and password are correct.         I used to posted a mesage abou