4G Signal Strength on MR6400

[superfly71]

Hi,

Calling uqmi -s -d /dev/cdc-wdm0 --get-signal-info in a script that loops will crash the script if another process calls uqmi according to this:

LTE Signal Lights; uqmi problem

Old thread for reference: So yes it is straightforward to write a script to poll uqmi --get-signal-info to turn LEDs on or off based on the received signal strength on a QMI modem. But then a problem occurs: I also have to work around a bug in uqmi: It does not lock the device it is working with. If the signal strength script and the LuCI status page code call it at the same time it locks up. I'm thinking of a wrapper script that puts a semaphore in place. This is indeed still the case. …

I did try the uqmi script here:

TP-Link TL-MR6400 v5.2 LTE configuration

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 …

It works but after some time the script stops running