TechInfoDepot:DD-WRT/LED Scripts
The example LED scripts below are written using the GPIO info for the Linksys WRT. Remember to change them for whatever router you have.
You can't use the GPIOS on Atheros chips (Fonera, Meraki, etc.) without PROC_GPIO or some other utility. PROC_GPIO is a driver, and thus it must be compiled for your specific kernel. Broadcom routers do not need an external driver to drive GPIOs.
GPIO Info for Linksys WRT
Pin Direction Name Use GPIO 0 Output WLAN LED (LED - wireless) GPIO 1 Output POWER LED (LED - power) GPIO 2 Output ADM_EECS (LED - white, Cisco button v. 3.0+) GPIO 3 Output ADM_EESK (LED - amber, Cisco button v. 3.0+) GPIO 4 Input ADM_EEDO (Button - Cisco Button v. 3.0+) GPIO 5 Output ADM_EEDI (Unknown) Seems to cycle all LED colors disabled. GPIO 6 Input RESET (Button - reset button) GPIO 7 Output DMZ LED (LED - DMZ)
GPIO Info for Linksys WRT150N v1.1 (dd-wrt.v24_mini_generic)
Here is a short summary of my experiments with WRT150N v1.1 on dd-wrt.v24_mini_generic firmware. WRT150N has a SECURITY LED (the most right LED)
root@DD-WRT:~# gpio enable 5 #(SECURITY LED - off - green) root@DD-WRT:~# gpio disable 5 #(SECURITY LED - on - green) root@DD-WRT:~# gpio disable 3 #(SECURITY LED - on - amber) root@DD-WRT:~# gpio enable 3 #(SECURITY LED - off - amber)
When you switched to gpio disable 3 (SECURITY LED - on - amber)
root@DD-WRT:~# gpio enable 5 #(SECURITY LED - will give you amber) root@DD-WRT:~# gpio disable 5 #(SECURITY LED - will give you amber bright)
GPIO Info for Linksys WRTSL54GS
This is for the WRTSL54GS model only.
Pin Direction Name Use GPIO 5 OUTPUT SES LED (Cisco white LED) GPIO 7 OUTPUT SES LED (Cisco amber LED)
GPIO Info for Buffalo WHR
Pin Direction Use GPIO 0 Input AOSS button GPIO 1 Output Bridge LED GPIO 2 Output WLAN LED GPIO 3 Output Extra LED between bridge and WLAN GPIO 4 Input Reset button GPIO 5 Input Bridge/auto switch GPIO 6 Output AOSS LED GPIO 7 Output DIAG LED GPIO 8 n/a Unkown/none GPIO 9 Output Power LED
GPIO Info for LaFonera 2100
Pin Use 0 TP3 1 pin 5 of SW1 2 WLAN LED 3 pin 1 of SW1 4 pin 2 of SW1 5 Reset (!) 6 Reset button 7 pin 6 of SW1
La Fonera 2200
2 WIFI LED contact at bottom of local resistor 5 Reset! (Can be used as a GPIO, but you lose reset functionality) This is the line closest to the RP4 component (next to 3 other lines, GPIOS 6, 2, and 7) Cut the trace and use the end closest to the CPU as a GPIO. 6 Reset button (other end of button is VDD, (3.3 V)) remove nearby capacitor 7 Power LED contact at bottom of local resistor
La Fonera 2201
1 WLAN Orange LED 2 WLAN Green LED 4 Power Green LED 7 Power Orange LED
GPIO Button Wifi Toggle D-Link DIR-300
This script will enable the button on the righte side to act as a wifitoggle. on press the button-led will light up
- RED, when wifi is going to be disabled. wifi-led on the front will go out.
- BLUE, when wifi is going to be enabled again. wifi-led on the front will light up.
#!/bin/sh
/sbin/gpio enable 4
echo "0" > /proc/gpio/4_out
echo "0" > /proc/gpio/4_in
while : ; do
WIFI=`nvram get ath0_net_mode`
sleep 1;
if [ "$(cat /proc/gpio/4_in )" = "1" ]; then
if [ "$WIFI" == "disabled" ]; then
/sbin/gpio enable 1
nvram set ath0_net_mode=mixed
/sbin/ifconfig ath0 up
/sbin/gpio enable 2
echo "0" > /proc/gpio/4_in
sleep 3
/sbin/gpio disable 1
else
/sbin/gpio enable 3
nvram set ath0_net_mode=disabled
/sbin/ifconfig ath0 down
/sbin/gpio disable 2
echo "0" > /proc/gpio/4_in
sleep 3
/sbin/gpio disable 3
fi
fi
done &
GPIO Info D-Link DIR-320
Pin Direction Use
GPIO 0 Output (LED - WIRELESS)
GPIO 1 Output (LED - STATUS)
GPIO 3 Output (LED - RED)
GPIO 4 Output (LED - BLUE)
GPIO 5 Output (LED - USB)
GPIO 6 Input (Button on the right)
For GPIO information, send a private message to DD-WRT user "meltyblood"
To turn cisco led blue / white ...
Per Eko here
Yellow cisco led on Linksys routers means that router got WAN ip. If you prefer it blue (white, ..) do:
In latest builds only (13522+):
nvram set connblue=1
nvram commit
reboot
Display Load via LED (load.sh)
- Uses front button LED to display current load on router.
- For WRT54G/GL/GS
#!/bin/sh
gpio="gpio"
amber=3
white=2
delay=3
meltdown=400
overload=100
highload=70
medload=30
while sleep $delay;do
set -- $(cat /proc/loadavg)
load="${1%.*}${1#*.}"
if [ $load -gt $meltdown ];then
$gpio disable $amber
usleep 50000
$gpio disable $white
usleep 50000
reboot
elif [ $load -gt $overload ];then
$gpio disable $amber
usleep 50000
elif [ $load -gt $highload ];then
$gpio disable $amber
usleep 12500
$gpio enable $amber
usleep 12500
$gpio disable $amber
usleep 12500
$gpio enable $amber
usleep 12500
$gpio disable $amber
usleep 12500
$gpio enable $amber
usleep 12500
elif [ $load -gt $medload ];then
$gpio enable $amber
$gpio disable $white
usleep 25000
$gpio enable $white
usleep 25000
$gpio disable $white
usleep 25000
$gpio enable $white
usleep 25000
else
$gpio disable $white
usleep 50000
$gpio enable $white
usleep 50000
fi
done
Modified Script for simple display of cpu usage/load -- I use the power LED Low activity/idle (led off), medium (short flashes), high (long flashes), max (led on solid)
#!/bin/sh
gpio="gpio"
#This is the LED to flash
led=0
extreme=110
high=75
med=35
while [ 0 ];do
set -- $(cat /proc/loadavg)
load="${1%.*}${1#*.}"
counter=10
if [ $load -gt $extreme ];then
$gpio disable $led
sleep 8
elif [ $load -gt $high ];then
while [ $counter -gt 0 ];do
usleep 200000
$gpio disable $led
usleep 800000
$gpio enable $led
let counter-=1
done
elif [ $load -gt $med ];then
while [ $counter -gt 0 ];do
usleep 800000
$gpio disable $led
usleep 200000
$gpio enable $led
let counter-=1
done
else
$gpio enable $led
sleep 8
fi
done
WDS link and/or associated wireless clients
- illuminates front button LED white when able to ping the gateway
- illuminates front button LED amber when wireless clients are connected
- illuminates both colors on the button when both conditions are true
- no light when neither condition is true
- developed / tested on a WRT54G-TM
GATEWAY=`ip route | awk '/default via/ {print $3}'`
WDS_LINK_ACTIVE=false
ASSOC_CLIENTS=false
LOOP=0
[ `sh -c "ps | grep $0 | grep -v grep -c"` -gt 1 ] && echo Already running && exit
while sleep 1
do
[ $LOOP -lt 300 ] && LOOP=$(( $LOOP + 1 )) || LOOP=1
while ! $WDS_LINK_ACTIVE
do
sleep 5
ping -c 1 $GATEWAY >/dev/null && WDS_LINK_ACTIVE=true
done
[ $LOOP -eq 1 ] && {
ping -c 1 $GATEWAY >/dev/null || WDS_LINK_ACTIVE=false
}
[ -z $(wl -i `nvram get wl0_ifname` assoclist) ] && ASSOC_CLIENTS=false || ASSOC_CLIENTS=true
$WDS_LINK_ACTIVE && gpio disable 2 || gpio enable 2
$ASSOC_CLIENTS && gpio disable 3 || gpio enable 3
done
WLAN Status (wlan.sh)
Works on k2.4 and k2.6
- Uses front button LED to show WLAN state. Amber LED indicates one or more associated clients, white LED flashes when data is sent over WLAN.
#!/bin/sh
I=`nvram get wl0_ifname`
while sleep 1; do
if [ -z `wl -i $I assoclist` ]; then
XFER=`ifconfig $I|grep bytes`
if [ "$XFER" != "$PXFER" ]; then
LED='gpio disable 3 ; gpio disable 2'
PXFER=$XFER
else
LED='gpio disable 3 ; gpio enable 2'
fi
else
LED='gpio enable 3 ; gpio enable 2'
fi
if [ "$LED" != "$PLED" ]; then
eval $LED
PLED=$LED
fi
done
WLAN Status (wlan.sh) - Buffalo Routers
- AOSS LED to show WLAN is associated with clients.
- Bridge LED flashes when data is transmitted over WLAN.
#!/bin/sh
I=`nvram get wl0_ifname`
while sleep 1; do
if [ -z `wl -i $I assoclist` ]; then
XFER=`ifconfig $I|grep bytes`
if [ "$XFER" != "$PXFER" ]; then
LED='gpio disable 1 ; gpio enable 1 ; gpio disable 6'
PXFER=$XFER
else
LED='gpio disable 6'
fi
else
LED='gpio enable 6'
fi
if [ "$LED" != "$PLED" ]; then
eval $LED
PLED=$LED
fi
done
WLAN Client Mode Status
Works on k2.4 and k2.6
Works on Repeater Bridge as well
- White LED if we can ping the gateway
- Orange LED if associated to an AP, but pinging fails.
#!/bin/sh
AMBER='gpio disable 3 ; gpio enable 2'
WHITE='gpio enable 3 ; gpio disable 2'
BLACK='gpio enable 3 ; gpio enable 2'
PACKETS='1'
INTERVAL='10'
trap lightsoff 1 2 3 6 14 15
lightsoff()
{
gpio enable 3 ; gpio enable 2 ; exit 1
}
while true ; do
if [ -z $(wl -i `nvram get wl0_ifname` assoclist) ]; then
TARGET=`ip route | awk '/default via/ {print $3}'`
RET=`ping -c $PACKETS $TARGET 2> /dev/null | awk '/packets received/ {print $4}'`
if [ "$RET" -eq "$PACKETS" ]; then
LED=$WHITE
else
LED=$AMBER
fi
else
LED=$BLACK
fi
if [ "$LED" != "$PLED" ]; then
eval $LED
PLED=$LED
fi
sleep $INTERVAL
done
WLAN Disable Radio If No Clients Connected
This is a cron job that will run every hour and turn off the radio if no clients are connected as requested here.
0 * * * * root I=`nvram get wl0_ifname`;[ -z `wl -i $I assoclist` ] && wl -i $I radio off
Show VPN status/activity with SES/Cisco LED
I worked out this little script out for my WRT54G-TM and WRT54GL and I thought I would share here since its based from examples shown on this forum and the wiki.
The script requires that you set 2 options in your vpn config file:
status /path/to/file (example: /tmp/vpn-status)
status-version 2
For activity it parses the info in /proc/net/dev
Be sure to edit the first 2 lines (VPN_STATUS= and VPN_DEV=) of this script to match your settings.. then Paste the following into your Startup script. Code:
vpn_leds() {
VPN_STATUS=/tmp/vpn-status
VPN_DEV=tap0
# make sure status file exists
[ ! -f "$VPN_STATUS" ] && return 1
# Set initial Cisco/SES Led mode
AMBER='gpio disable 3 ; gpio enable 2'
WHITE='gpio enable 3 ; gpio disable 2'
BLACK='gpio enable 3 ; gpio enable 2'
eval $BLACK
LAST_ACT=0
while [ 1 ]; do
if [ $(cat "$VPN_STATUS" |grep -c "") -gt 6 ]; then
# tunnel up. White LED
LED=$WHITE
ACT_STRING="$(cat /proc/net/dev |grep "$VPN_DEV")"
if [ "$ACT_STRING" != "$LAST_ACT" ]; then
LED=$AMBER
LAST_ACT=$ACT_STRING
else
LED=$WHITE
LAST_ACT=$ACT_STRING
fi
else
# tunnel down. All leds OFF
LED=$BLACK
fi
if [ "$LED" != "$PLED" ]; then
eval $LED
LAST_LED=$LED
fi
sleep 1
done
}
vpn_leds &
Reboot your router and viola!
Light off = Tunnel down
White = Tunnel up
Amber = Activity
You can change the behavior of this script by changing each LED=$COLOR line.
Response time for tunnel up/down indication for my setup is 60sec for client connect and 120sec for disconnect. I believe the disconnect response could be improved by changing your keepalive setting in your VPN config.
Mine is set to: keepalive 10 120
This means OpenVPN will ping the client every 10sec and assume the client has disconnect if no reply is received within 120sec. lowering the last value should improve the response time but be careful not to lower it too much as not to cause connection drops due to timeout
Hope this helps,
-onemyndseye
Original Post
Update: Fun with egrep!
Here is an updated version that will monitor for activity on ANY tap or tun device that exists. Still only showing up/down status for 1 tunnel
vpn_leds() {
VPN_STATUS=/tmp/vpn-status
# make sure status file exists
[ ! -f "$VPN_STATUS" ] && return 1
# Set initial Cisco/SES Led mode
AMBER='gpio disable 3 ; gpio enable 2'
WHITE='gpio enable 3 ; gpio disable 2'
BLACK='gpio enable 3 ; gpio enable 2'
eval $BLACK
LAST_ACT="$(cat /proc/net/dev |egrep "tap|tun")"
while [ 1 ]; do
if [ $(cat "$VPN_STATUS" |grep -c "") -gt 6 ]; then
# tunnel up. White LED
LED=$WHITE
ACT_STRING="$(cat /proc/net/dev |egrep "tap|tun")"
if [ "$ACT_STRING" != "$LAST_ACT" ]; then
LED=$AMBER
LAST_ACT=$ACT_STRING
else
LED=$WHITE
LAST_ACT=$ACT_STRING
fi
else
# tunnel down. All leds OFF
LED=$BLACK
fi
if [ "$LED" != "$PLED" ]; then
eval $LED
LAST_LED=$LED
fi
sleep 1
done
}
vpn_leds &
USB Disc Mount Status and Umount Button (DIR-320 running v24-sp2 mini-usb-ftp)
- SES red LED to indicate disc mounted
- SES button to umount disc
- SES blue LED to indicate umounting proccess
Script /jffs/etc/config/mount_status.startup (disc mount status)
#!/bin/sh
mp="/`nvram get usb_mntpoint`"
RED_ON='gpio disable 3'
RED_OFF='gpio enable 3'
while sleep 1; do
if [ "`mount | grep $mp`" ]; then
LED=$RED_OFF
else
LED=$RED_ON
fi
if [ "$LED" != "$PLED" ]; then
eval $LED
PLED=$LED
fi
done
Script /jffs/etc/config/mount.sesbutton
#!/bin/sh
mp="/`nvram get usb_mntpoint`"
proftpd_enable="`nvram get proftpd_enable`"
RED_ON='gpio disable 3'
RED_OFF='gpio enable 3'
BLUE_ON='gpio disable 4'
BLUE_OFF='gpio enable 4'
if [ "`mount | grep $mp`" ]; then
$RED_OFF
$BLUE_ON
if [ "$proftpd_enable" == "1" ]; then
killall proftpd
fi
umount $mp
if [ "$proftpd_enable" == "1" ]; then
proftpd
fi
fi
if [ "`mount | grep $mp`" ]; then
$RED_ON
else
$RED_OFF
fi
$BLUE_OFF
Display signal strength over the SES light - Linksys router
http://www.dd-wrt.com/phpBB2/viewtopic.php?p=461193
Use this script
If you want to catch a better signal without computers.
Script not work in dd-wrt micro version
Linksys routers where this script will work :
- WRT54GL v1.0
- WRT54GL v1.1
- WRT54G-TM
- WRT54G v4.0
Linksys routers where the script does not work:
- WRT54GS v6.0
- WRT54G v5
- WRTSL54GS
has not yet been tested on other models
Discuss here.
Script Version 1
- No signal or very weak
- Low signal
- Good signal
- Excellent signal
Installation is pretty simple:
1. Go to "Administration -> Commands"
2. Paste script in "Command Shell"
3. Click on "Save Startup"
4. Reboot router
Works great in Client mode and Repeater mode
To work in AP mode, you must put the mac address
#!/bin/sh
############Created by MOJSO####################
# White / Black / White - low signal #
# Amber / Black / Amber - good signal #
# Amber / White / Amber - excellent signal#
############################################
while sleep 3; do
BLACK=`gpio enable 3 ; gpio enable 2`
S=`wl rssi` #(put mac adress if in AP mod example: S=`wl rssi 00:11:22:33:44:55` )
N=`wl noise`
SC=`expr $S - $N`
RSC=`expr $SC / 10`
if [ $RSC -eq 0 ]; then
gpio enable 3 ; gpio enable 2 ;
elif [ $RSC -eq 1 ]; then
gpio enable 3 ; gpio disable 2 ;
sleep 1
gpio enable 3 ; gpio enable 2 ;
sleep 1
gpio enable 3 ; gpio disable 2 ;
elif [ $RSC -eq 2 ]; then
gpio enable 3 ; gpio disable 2 ;
sleep 1
gpio enable 3 ; gpio enable 2 ;
sleep 1
gpio enable 3 ; gpio disable 2 ;
elif [ $RSC -eq 3 ]; then
gpio enable 3 ; gpio disable 2 ;
sleep 1
gpio enable 3 ; gpio enable 2 ;
sleep 1
gpio enable 3 ; gpio disable 2 ;
elif [ $RSC -eq 4 ]; then
gpio disable 3 ; gpio enable 2 ;
sleep 1
gpio enable 3 ; gpio enable 2 ;
sleep 1
gpio disable 3 ; gpio enable 2 ;
elif [ $RSC -eq 5 ]; then
gpio disable 3 ; gpio enable 2 ;
sleep 1
gpio enable 3 ; gpio enable 2 ;
sleep 1
gpio disable 3 ; gpio enable 2 ;
elif [ $RSC -ge 6 ]; then
gpio disable 3 ; gpio enable 2 ;
sleep 1
gpio enable 3 ; gpio disable 2 ;
sleep 1
gpio disable 3 ; gpio enable 2 ;
else gpio enable 3 ; gpio enable 2 ;
fi
done
Script Version 2
Script version two show signal more precise
SIGNAL STRENGTH
- 0 blink = SNR < 9 No signal or very weak
- 1 blink = SNR 10-19
- 2 blinks = SNR 20-29
- 3 blinks = SNR 30-39
- 4 blinks = SNR 40-49
- 5 blinks = SNR 50-59
- 6 blinks = SNR 60 > Excellent signal
#!/bin/sh
###############################################
#----Created by MOJSO-----Script version 2----#
###############################################
# SIGNAL STRENGTH
# 0 blink = SNR < 9 No signal or very weak
# 1 blink = SNR 10-19
# 2 blinks = SNR 20-29
# 3 blinks = SNR 30-39
# 4 blinks = SNR 40-49
# 5 blinks = SNR 50-59
# 6 blinks = SNR 60 > Excellent signal
###############################################
while sleep 3; do
BLACK=`gpio enable 3 ; gpio enable 2`
S=`wl rssi` #(put mac adress if in AP mod example: S=`wl rssi 00:11:22:33:44:55` )
N=`wl noise`
SC=`expr $S - $N`
RSC=`expr $SC / 10`
if [ $RSC -eq 0 ]; then
gpio enable 3 ; gpio enable 2 ;
elif [ $RSC -eq 1 ]; then
gpio enable 3 ; gpio disable 2 ;
usleep 500000
gpio enable 3 ; gpio enable 2 ;
elif [ $RSC -eq 2 ]; then
gpio enable 3 ; gpio disable 2 ;
usleep 500000
gpio enable 3 ; gpio enable 2 ;
usleep 500000
gpio enable 3 ; gpio disable 2 ;
usleep 500000
gpio enable 3 ; gpio enable 2 ;
elif [ $RSC -eq 3 ]; then
gpio enable 3 ; gpio disable 2 ;
usleep 250000
gpio enable 3 ; gpio enable 2 ;
usleep 250000
gpio enable 3 ; gpio disable 2 ;
usleep 250000
gpio enable 3 ; gpio enable 2 ;
usleep 250000
gpio enable 3 ; gpio disable 2 ;
usleep 250000
gpio enable 3 ; gpio enable 2 ;
elif [ $RSC -eq 4 ]; then
gpio disable 3 ; gpio enable 2 ;
usleep 250000
gpio enable 3 ; gpio enable 2 ;
usleep 250000
gpio disable 3 ; gpio enable 2 ;
usleep 250000
gpio enable 3 ; gpio enable 2 ;
usleep 250000
gpio disable 3 ; gpio enable 2 ;
usleep 250000
gpio enable 3 ; gpio enable 2 ;
usleep 250000
gpio disable 3 ; gpio enable 2 ;
usleep 250000
gpio enable 3 ; gpio enable 2 ;
elif [ $RSC -eq 5 ]; then
gpio disable 3 ; gpio enable 2 ;
usleep 250000
gpio enable 3 ; gpio enable 2 ;
usleep 250000
gpio disable 3 ; gpio enable 2 ;
usleep 250000
gpio enable 3 ; gpio enable 2 ;
usleep 250000
gpio disable 3 ; gpio enable 2 ;
usleep 250000
gpio enable 3 ; gpio enable 2 ;
usleep 250000
gpio disable 3 ; gpio enable 2 ;
usleep 250000
gpio enable 3 ; gpio enable 2 ;
usleep 250000
gpio disable 3 ; gpio enable 2 ;
usleep 250000
gpio enable 3 ; gpio enable 2 ;
elif [ $RSC -ge 6 ]; then
gpio disable 3 ; gpio enable 2 ;
usleep 250000
gpio enable 3 ; gpio enable 2 ;
usleep 250000
gpio enable 3 ; gpio disable 2 ;
usleep 250000
gpio enable 3 ; gpio enable 2 ;
usleep 250000
gpio disable 3 ; gpio enable 2 ;
usleep 250000
gpio enable 3 ; gpio enable 2 ;
usleep 250000
gpio enable 3 ; gpio disable 2 ;
usleep 250000
gpio enable 3 ; gpio enable 2 ;
usleep 250000
gpio disable 3 ; gpio enable 2 ;
usleep 250000
gpio enable 3 ; gpio enable 2 ;
usleep 250000
gpio enable 3 ; gpio disable 2 ;
usleep 250000
gpio enable 3 ; gpio enable 2 ;
else gpio enable 3 ;
fi
done
