Toggle Download Mode on Buffalo WSR-3200AX4S via WPS button

README.md

Buffalo WSR-3200AX4S running OpenWRT would crash when cloning large git repos. I found that SQM with layer_cake would fix this, but was unstable over the long term. So I tied a toggle script to the WPS button so I could switch between download mode and regular mode.

download_toggle.sh

#!/bin/sh

# Save to /root/download_toggle.sh and make executable (chmod +x /root/download_toggle.sh)

# Check the currently active SQM script
CURRENT_SCRIPT=$(uci -q get sqm.map.script)

if [ "$CURRENT_SCRIPT" = "layer_cake.qos" ]; then
    # Currently in Download Mode -> Switch to Normal Mode
    uci set sqm.map.qdisc='fq_codel'
    uci set sqm.map.script='simplest.qos'
    logger -t SQM_TOGGLE "Switched SQM to Normal Mode (fq_codel / simplest.qos)"
else
    # Currently in Normal Mode (or unknown) -> Switch to Download Mode
    uci set sqm.map.qdisc='cake'
    uci set sqm.map.script='layer_cake.qos'
    logger -t SQM_TOGGLE "Switched SQM to Download Mode (cake / layer_cake.qos)"
fi

# Ensure your bandwidth limits remain strictly applied
uci set sqm.map.linklayer='none'
uci set sqm.map.download='224000'
uci set sqm.map.upload='320000'

# Save and restart SQM
uci commit sqm
/etc/init.d/sqm restart

wps.sh

#!/bin/sh

# Save to /etc/rc.button/wps (without the .sh extension) and make executable (chmod +x /etc/rc.button/wps)

# Only trigger when the button is released
if [ "$ACTION" = "released" ]; then
    /root/download_toggle.sh &
fi