Thanks @Federico for pointing out the right starting page. There is still something that does not work though. After editing
I get that:
command failed: Device or resource busy (-16)
Command failed: Not found
Successfully initialized wpa_supplicant
Line 20: unknown network field 'eap'.
Line 25: unknown network field 'phase2'.
Line 26: unknown network field 'identity'.
Line 27: unknown network field 'password'.
Line 33: failed to parse network block.
Failed to read or parse configuration '/var/run/wpa_supplicant-wlan0.conf'.
enable_mac80211(radio0): Failed to set up wpa_supplicant for interface wlan0
Something not working with the spa_supplicant thing I suppose. It's hard to give you more details, for I have no complete control overt the wifi environment...