TP-Link TL-MR6400 v5.2 LTE configuration

Installing and Using OpenWrt
8

I wrote down script for it.

#!/bin/sh

os=-1
while true; do
  rssi=$(uqmi -d /dev/cdc-wdm0 -t 1000 -s --get-signal-info | jsonfilter -e '@["rssi"]')
  
  if [ -z $rssi ] || [ $rssi -ge 0 ]; then s=0;
  elif [ $rssi -ge -65 ]; then s=3;
  elif [ $rssi -ge -75 ]; then s=2;
  elif [ $rssi -ge -85 ]; then s=1;
  else s=0;
  fi
  
  if [ $os != $s ]; then
    case $s in
      0) 
         echo 0 > /sys/class/leds/white:signal1/brightness
         echo 0 > /sys/class/leds/white:signal2/brightness
         echo 0 > /sys/class/leds/white:signal3/brightness
      ;;
      1)
         echo 255 > /sys/class/leds/white:signal1/brightness
         echo 0 > /sys/class/leds/white:signal2/brightness
         echo 0 > /sys/class/leds/white:signal3/brightness
      ;;
      2)
         echo 255 > /sys/class/leds/white:signal1/brightness
         echo 255 > /sys/class/leds/white:signal2/brightness
         echo 0 > /sys/class/leds/white:signal3/brightness
      ;;
      3)
         echo 255 > /sys/class/leds/white:signal1/brightness
         echo 255 > /sys/class/leds/white:signal2/brightness
         echo 255 > /sys/class/leds/white:signal3/brightness
      ;;
    esac
    os=$s
  fi
  sleep 5
done

exit

To make it automatically start could insert such line into /etc/rc.local:

/etc/ledltesignal.sh &