wififix.sh

#!/bin/bash

# Script to reset wifi on a Raspberry Pi Zero W
# Outputs a message to systemd-journal every time it resets
#
# nothing else seemed to work
#
# Run it with crontab every minute


GATEWAY_IP=$(/sbin/ip -4 route | grep default | awk '{print $3}')


_am_i_online() {
    ping -D -c3 $GATEWAY_IP
}

_fix_it() {
    echo "can't reach gateway! unloading / reloading wifi kernel module" | systemd-cat -t $(basename $0)
    # shutdown -r
    /sbin/modprobe -r brcmfmac
    /sbin/modprobe brcmfmac
}

_am_i_online || _fix_it