em(Enable Monitor mode) command - n-aizu/android_kernel_samsung_aries GitHub Wiki

#!/system/bin/sh

svc wifi disable

echo -n /system/vendor/firmware/fw_bcm4329.bcmon.bin > /sys/module/bcmdhd/parameters/firmware_path
ip link set wlan0 up

iw dev wlan0 interface add mon.wlan0 type monitor flags none
ip link set mon.wlan0 up

iw dev wlan0 set channel 1