wififo - OpenWRT daemon for WAN multi-wifi failover

Features

• user list of wifi networks ssid and keys, ordered by priority
• scans wifi APs and connect to the most prioritized
• allow specifying SQM download/upload values per wifi
• continuously tests connectivity (ICMP)
• continuously tests if a higher-priority wifi becomes available
• no extra OpenWRT modifications needed, wififo sets current wifi network via regular uci commands

Copy wififo to the target openwrt system:

scp wififo root@192.168.1.1:/etc/init.d/
scp wififo.conf.example root@192.168.1.1:/etc/

Start and enable wififo at boot:

chmod +x /etc/init.d/wififo
/etc/init.d/wififo start
/etc/init.d/wififo enable

The list of wifi networks is provided through /etc/wififo.conf with this format:

- <ssid>
<psk>
<network_interface> <openwrt_interface_name> <encryption> [<sqm_download> [<sqm_upload>]]

The networks must be specified in order of priority.

For example (see wififo.conf.example):

- BestSSID
ThisIsAComplexWPAKey
wlan0 wifinet1 psk2
- OtherSSID
LittleKeyKey
wlan0 wifinet1 psk2
# IgnoredNetwork
mypskmypsk
wlan0 wifinet1 psk2

Logs are in /tmp/wififo.log

Start in foreground and log to stdout:

/etc/init.d/wififo main

Enable verbose logging:

VERBOSE=1 /etc/init.d/wififo main

• Use wpa_supplicant, but this requires tweaking and does not provide ping connectivity tests. Support for User-Defined Wpa-Supplicant Config: https://forum.openwrt.org/t/support-for-user-defined-wpa-supplicant-config/2603/8