GETTING STARTED: WiFi at Galilleo

Ingredients:

Ethernet cable
Micro-USB to USB-host adapter cable (get/build)
Wi-Fi USB dongle

Manual step-by-step process:

Connect: Router -> Ethernet cable -> Galilleo Ethernet port
Turn Galilleo on
Log-in to you router and find which new DHCP address was allocated
Check that this new DHCP client replies to ping
Open PuTTY and connect to that IP address with SSH protocol
At newly opened by PuTTY SSH console log-in into Galilleo with name ‘root’
Execute ‘lsusb’ command and check how many USB ports you have

root@galileo:~# lsusb
Bus 001 Device 001: ID 1d6b:0002
Bus 002 Device 001: ID 1d6b:0001

Connect wi-fi: Wi-Fi dongle -> adapter cable -> Galilleo USB-host port
See that you have you have one more USB port added top the list

root@galileo:~# lsusb
Bus 001 Device 003: ID 7392:7811
Bus 001 Device 001: ID 1d6b:0002
Bus 002 Device 001: ID 1d6b:0001

also you may execute the command below to check the connection at logs

dmesg | tail -10

execute iwconfig to check which name was assigned to wi-fi dongle you connected

root@galileo:~# iwconfig
wlp0s20f3u1 IEEE 802.11bgn ESSID:off/any
Mode:Managed Access Point: Not-Associated Tx-Power=off
Retry long limit:7 RTS thr=2347 B Fragment thr:off
Encryption key:off
Power Management:on

lo no wireless extensions.

enp0s20f6 no wireless extensions.

Add your WLAN to configuration by editing of /etc/wpa_supplicant.conf.
Prepare configuration of static IP for your wi-fi dongle by editing of /etc/network/interfaces

Make sure, this IP is not in the range of IP’s reserved for DHCP allocations at your router.

Activate wpa_supplicant for your wi-fi interface and its configuration file

root@galileo:~# pidof wpa_supplicant
201
root@galileo:~# kill -9 201
root@galileo:~# wpa_supplicant -iwlp0s20f3u1 -c/etc/wpa_supplicant.conf &
root@galileo:~# pidof wpa_supplicant
214

unblock your wi-fi

root@galileo:~# rfkill unblock 0

activate your wi-fi

root@galileo:~# ifup wlp0s20f3u1

use ‘ifconfig’ to check if IP address was allocated to your wi-fi interface

Wi-Fi initializing automatically at each boot:

Edit /lib/systemd/system/wpa_supplicant.service so that parameter ExecStar= will have 2 additional parameters -iwlp0s20f3u1 -c/etc/wpa_supplicant.conf and will be executed in background &

ExecStart=/usr/sbin/wpa_supplicant -u -iwlp0s20f3u1 -c/etc/wpa_supplicant.conf &

Create wi-fi initialization python file: /etc/init.d/wifi_up.py
Create EXECUTEABLE (chmod +x <fname>) auto-initialization file: /etc/init.d/wifi (source information):
After file editing is done at /etc/init.d/ execute command bellow to make sure this script is executed every time linux boots:
update-rc.d wifi defaults
disconnect your Ethernet cable
Reboot your Galilleo board with ‘reboot’ command or power reset
ping your static wi-fi IP from your PC until it answers positively.

ping 192.168.1.201

at this point you should be ready to use your wi-fi connection with Gallileo. If this didn’t work for the first time, toggle reset button and try again. Connecting to Galilleo via serial port and observing boot messages usally helps to understand if things happened or not. These are the messages at the end of my log (when lines stop running at the terminal) when wi-fi succeeded to connect:

[ 29.190933] rtl8192cu: MAC auto ON okay!
[ 30.810970] wlp0s20f3u1: authenticate with d8:50:e6:cc:b0:50