I have a raspberry Pi 3 Model B.

I have installed fullpageos on the rasp.

I run the wpa_supplicant command to connect to the wifi. I use the following command -

wpa_supplicant -Dnl80211 -iwlan0 -cconfig.conf -B

The config file looks like the following -


The command works only once after a reboot. When I want to change the wifi network (with an edit in the config file), the command gives the error 4 way handshake failed, pre shared key may be wrong, where as the key for the wifi network is correct.

This looks bizarre because it works the first time. I hope I am not missing anything important.

  • You would have to explain what networking system it uses. There are only 2 posts with this tag (the other by the author) - frankly the fact that he didn't get the name right in the tag, and also misspells the name (diferently) in his post, doesn't exactly inspire confidence.
    – Milliways
    Mar 31 '17 at 5:59

Try running

sudo ifdown wlan0
sudo ifup wlan0

once you modify the wpa_supplicant file.

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