E/wpa_supplicant(  856): Failed to initialize control interface 'wlan0'.
E/wpa_supplicant(  856): You may have another wpa_supplicant process already running or the file was
E/wpa_supplicant(  856): left by an unclean termination of wpa_supplicant in which case you will need
E/wpa_supplicant(  856): to manually remove this file before starting wpa_supplicant again.