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WiFi

The Luckfox Pico Zero is equipped with the AIC8800DC module, supporting the WiFi AX protocol (WiFi 6), and compatible with 2.4GHz WiFi and Bluetooth 5.2/BLE.By default, the development board uses an external antenna. To switch to the onboard chip antenna, simply pull up GPIO pin 123. The steps are as follows:

echo 123 > /sys/class/gpio/export  
cd /sys/class/gpio/gpio123
echo out > direction     
echo 1 > value

WiFi​

Buildroot Connection WiFi​

  1. Edit the WiFi configuration file using vi or nano editor

    nano /etc/wpa_supplicant.conf 

    ctrl_interface=/var/run/wpa_supplicant
    ap_scan=1
    update_config=1

    network={
            ssid="luckfox"
            psk="12345678"
            key_mgmt=WPA-PSK
    }

    • ssid: Name of the wireless network

      psk: Password of the wireless network

      Modify according to your actual wireless network name and password. No need to change other settings.

  2. If you want to switch WiFi networks, you need to restart the wpa_supplicant service:

    killall -9 wpa_supplicant 
    wpa_supplicant -B -i wlan0 -c /etc/wpa_supplicant.conf

  3. Connect to the wireless network.

    udhcpc -i wlan0

  4. Note: These settings will be lost after reboot. To persist the configuration, you’ll need to write a startup script (for onboard antenna).

    #!/bin/sh

     GPIO_NUM=123
     WPA_CONF="/etc/wpa_supplicant.conf"

     echo_log() {
         echo "[wifi-autostart] $1"
     }

     case "$1" in
         start)
             echo_log "Exporting and setting GPIO${GPIO_NUM} high..."
             [ ! -d "/sys/class/gpio/gpio${GPIO_NUM}" ] && echo "${GPIO_NUM}" > /sys/class/gpio/export
             echo out > "/sys/class/gpio/gpio${GPIO_NUM}/direction"
             echo 1 > "/sys/class/gpio/gpio${GPIO_NUM}/value"

             echo_log "Starting wpa_supplicant..."
             killall -q wpa_supplicant
             wpa_supplicant -B -i wlan0 -c "${WPA_CONF}"

             echo_log "Requesting IP address via udhcpc..."
             udhcpc -i wlan0

             echo_log "WiFi setup complete."
             ;;
         stop)
             echo_log "Stop command received. Stopping wpa_supplicant..."
             killall -q wpa_supplicant
             ;;
         *)
             echo "Usage: $0 {start|stop}"
             exit 1
             ;;
     esac

  5. According to the above configuration method, the settings will be lost after reboot. Therefore, you need to create a startup script to reapply them (for external antenna use).

    nano /etc/init.d/S99wlan0
    #!/bin/sh

    case $1 in
            start)
            wpa_supplicant -B -i wlan0 -c /etc/wpa_supplicant.conf
            udhcpc -i wlan0
                    ;;
            stop)
                    ;;
            *)
                    exit 1
                    ;;
    esac
    chmod +x  /etc/init.d/S99wlan0
    reboot

WiFi Speed Test​

  1. On the virtual machine or host

    iperf3 -s -i 10 -p 5001

    • -s: Specifies that iperf3 runs in server mode

      -i: Sets the report interval to 10 seconds

      -p: Specifies the server port as 5001

  2. On the development board

    iperf3 -c 192.168.10.176 -p 5001 -f m -i 2 -t 24
    • -c：指定客户端模式，并设置要连接的服务器IP地址为192.168.10.176
    • -p：指定服务器端口为5001
    • -f：指定报告的格式。m 代表 Mbps，即报告的带宽单位为兆比特每秒
    • -i：指定报告的间隔时间为每1秒
    • -t ：指定测试的持续时间为30秒

Bluetooth​

Due to certain dependencies of the BlueZ tools in Buildroot only supporting glibc and not ulibc, the tool cannot be used.

  • Setting ttyS1 as a Bluetooth HCI device:

    # Older driver version
    hciattach -s 115200 /dev/ttyS1 any 115200 flow nosleep&

    # Newer driver version
    hciattach -s 1500000 /dev/ttyS1 any 1500000 flow nosleep&

  • Enabling hci0:

    hciconfig hci0 up

  • Checking Bluetooth status:

    hciconfig -a

    #蓝牙详细信息
    hci0:   Type: Primary  Bus: UART
            BD Address: 90:E4:68:A6:D6:94  ACL MTU: 1021:9  SCO MTU: 255:4
            UP RUNNING 
            RX bytes:1344 acl:0 sco:0 events:77 errors:0
            TX bytes:1217 acl:0 sco:0 commands:77 errors:0
            Features: 0xbf 0xee 0xcd 0xfe 0xd8 0x3d 0x7b 0x87
            Packet type: DM1 DM3 DM5 DH1 DH3 DH5 HV1 HV3 
            Link policy: RSWITCH SNIFF 
            Link mode: PERIPHERAL ACCEPT 
            Name: 'BlueZ 5.65'
            Class: 0x000000
            Service Classes: Unspecified
            Device Class: Miscellaneous, 
            HCI Version: 5.2 (0xb)  Revision: 0x14
            LMP Version: 5.2 (0xb)  Subversion: 0x14
            Manufacturer: not assigned (2875)

  • Scanning for Bluetooth devices:

    hcitool scan

  • Bluetooth testing:

    hcitool cmd xxxx