I just installed stretch on my RPi 3 B+ running Raspbian Stretch. During installation it asked for my WiFi network info. However, it wouldn't accept it. I have it now working with a wired internet connection, but how do I now try to configure WiFi again?

  • 1
    It would be most helpful to have the actual error messages that you are seeing. – dlu Apr 6 '18 at 19:49
  • what does this mean? it wouldn't accept it – jsotola Apr 6 '18 at 19:56
  • How to set up networking/WiFi – Milliways Apr 6 '18 at 23:40

Assuming that the problem is a mistyped SSID or passphrase, run raspi-config:

  • Select 2 - Network Options to set the Wifi SSID and passphrase.
  • While you at it, select 4 - Localization Options and confirm that your Wifi region is set correctly.

In addition, you might try this:

sudo iwlist wlan0 scan 

Verify that your SSID (ESSID) is in the list.

There's a detailed how-to for wifi configuration at the Rpi/documentation website if you want to setup wifi from the command line. And finally, the if you're running "headless" you can now edit the wpa-supplicant file in /boot on the uSD card... actually, I'm pretty sure you can do this running "with head" :) also, but it's required for wifi access if you're headless.

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