Enable Persistent WiFi on NXP FRDM IMX93 Board

[armwaheed]

Here are instructions to configure the NXP board to connect to a specific WiFi network on boot.

1. Log in to Linux on the board, as root

2. Create a wpa_supplicant.conf:

   touch /etc/wpa_supplicant.conf
   nano /etc/wpa_supplicant.conf

   Enter your WiFi credentials into the wpa_supplicant.conf file:

   ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev
   update_config=1
   
   network={
       ssid="YOUR_SSID"
       psk="YOUR_PASSWORD"
       key_mgmt=WPA-PSK
   }

3. Test the wpa_supplicant.conf file:

   modprobe moal mod_para=nxp/wifi_mod_para.conf
   ifconfig mlan0 up
   wpa_supplicant -B -i mlan0 -c /etc/wpa_supplicant.conf
   udhcpc -i mlan0

   • mlan0 is the WiFi interface on i.MX93
   • If this connects to WiFi, we’re ready for automation
     
     

4. Configure DNS server IP addresses, so that the NXP board can resolve Internet addresses:

   touch /usr/share/udhcpc/default.script
   nano /usr/share/udhcpc/default.script

   and add in the following udhcpc script:

   #!/bin/sh
   # udhcpc script
   case "$1" in
       deconfig)
           ip addr flush dev $interface
           ;;
       bound|renew)
           ip addr add $ip/$subnet dev $interface
           ip route add default via $router
           echo "nameserver 8.8.8.8" > /etc/resolv.conf
           echo "nameserver 1.1.1.1" >> /etc/resolv.conf
           ;;
   esac

   Make the default.script executable:

   chmod +x /usr/share/udhcpc/default.script

5. Create a nxp-wifi-setup.sh script:

   touch /usr/bin/nxp-wifi-setup.sh
   nano /usr/bin/nxp-wifi-setup.sh

   and add in the following lines:

   #!/bin/sh
   # Load WiFi driver
   /usr/sbin/modprobe moal mod_para=nxp/wifi_mod_para.conf
   
   # Bring interface up
   /usr/bin/ifconfig mlan0 up
   
   # Connect to WiFi
   /usr/sbin/wpa_supplicant -B -i mlan0 -c /etc/wpa_supplicant.conf
   
   # Obtain DHCP IP + DNS
   /usr/sbin/udhcpc -i mlan0 -s /usr/share/udhcpc/default.script

   Make the nxp-wifi-setup.sh executable:

   chmod +x /usr/bin/nxp-wifi-setup.sh

6. Create a nxp-wifi-setup.service:

   touch /etc/systemd/system/nxp-wifi-setup.service
   nano /etc/systemd/system/nxp-wifi-setup.service

   Enter the following systemd commands into the nxp-wifi-setup.service file:

   [Unit]
   Description=WiFi Setup for NXP FRDM i.MX93
   After=network.target
   
   [Service]
   Type=oneshot
   ExecStart=/usr/bin/nxp-wifi-setup.sh
   RemainAfterExit=yes
   
   [Install]
   WantedBy=multi-user.target

7. Create a wpa_supplicant.service:

   touch /etc/systemd/system/wpa_supplicant.service
   nano /etc/systemd/system/wpa_supplicant.service

   Enter the following systemd commands into the wpa_supplicant.service file:

   [Unit]
   Description=WPA Supplicant daemon
   After=network.target
   
   [Service]
   Type=simple
   ExecStart=/usr/sbin/wpa_supplicant -i mlan0 -c /etc/wpa_supplicant.conf
   Restart=always
   
   [Install]
   WantedBy=multi-user.target

8. Enable and Start the nxp-wifi-setup.service:

   systemctl daemon-reload
   systemctl enable nxp-wifi-setup.service wpa_supplicant.service
   systemctl start nxp-wifi-setup.service wpa_supplicant.service

9. Check status:

systemctl status nxp-wifi-setup.service
systemctl status wpa_supplicant.service

and confirm Internet connectivity:

curl -I http://www.example.com

[Zhiming_Liu]

Hi @armwaheed 

Thanks for sharing !

Best Regards,
Zhiming