Wifi firmware for Raspberry Pi 3

To make the Raspberry pi 3 Wifi to work…we need to get or have atleast 2 files. But first we must create a folder inside the /lib/firmware/ and name it brcm. And in that folder we’ll put brcmfmac43430-sdio.bin and brcmfmac43430-sdio.txt.

Prerequisite:

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//make sure these are installed:
wpa-supplicant
wireless-tools

brcmfmac43430-sdio.bin brcmfmac43430-sdio.txt

Download and place the brcmfmac43430-sdio.bin and brcmfmac43430-sdio.txt inside the /lib/firmware/brcm folder. If the file above doesn’t make your wifi to work get it directly from the Mainline linux

Connect to WPA/WPA2 WiFi network

Generate a configuration file for wpa_supplicant.

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// This commands must be run as root and sudo alone won't work
sudo su
wpa_passphrase MyWifi >> /etc/wpa_supplicant/wpa_supplicant.conf

// a blinking underline cursor after pressing enter
...type in your wifi password and hit enter again...

// Then exit
exit

Now edit /etc/wpa_supplicant/wpa_supplicant.conf.

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sudo nano /etc/wpa_supplicant/wpa_supplicant.conf

You’ll see similar to this and modify accordingly.

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# reading passphrase from stdin
network={
  ssid="MyWifi"
  #psk="testtest" // You may now remove this line as the password are now hashed for security
  psk=4dfe1c985520d26a13e932bf0acb1d4580461dd854ed79ad1a88ec221a802061
  scan_ssid=1
  proto=RSN
  key_mgmt=WPA-PSK
  pairwise=CCMP
  auth_alg=OPEN
}

scan_ssid=1 - only needed if your access point uses a hidden ssid

Then run wpa_cli -i wlan0 reconfigure and verify with ifconfig wlan0.

Configure For Static IP

Edit /etc/dhcpcd.conf and add these lines at the very bottom.

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interface wlan0
static ip_address=192.168.10.13
static routers=192.168.10.1
static domain_name_servers=8.8.8.8

There are several ways for configuration and i decided to stick with this one for now.

To Do using Netplan instead or iwd

Reboot and verify that wifi is now working and connected to your network.

Reference :

https://github.com/RPi-Distro/firmware-nonfree/tree/master/brcm80211/brcm
https://help.ubuntu.com/community/WifiDocs/WPAHowTo
https://w1.fi/cgit/hostap/plain/wpa_supplicant/wpa_supplicant.conf
SETTING WIFI UP VIA THE COMMAND LINE