[FEATURE] Modify low battery level for notification

[claud2893]

Is your feature request related to a problem? Please describe.

After having installed the stable release version 2.9.9.3, I have noticed that whenever my laptop's battery reaches 20%, a notification appears. This new features is really useful, but I would like to adjust the percentage at my preference (10%) for this notification. I have checked among the config files to find where this new feature is saved and described, but I couldn't find it anywhere.

Describe the solution you'd like

I would like to adjust the percentage level for the notification at my preference, either in the settings window or in the sidebar, or even in the notifications window.

Describe alternatives you've considered

Editing any config file with this feature would fine as well, but I would like to know where to find this setting.

Additional context

No response

Support or Contribution

• I am willing to contribute or support this feature

[tetam01]

You will get the first notification on 20% and a second one at 15%. To change this behavior you have to modify the file low-bat-notification.sh in the folder ~/.config/ml4w/listeners

Stock file looks like this:

#!/bin/bash

BAT=$(command ls -d /sys/class/power_supply/BAT* 2>/dev/null | head -n 1)
if [[ -z "$BAT" ]]; then
    exit 0
fi

NOTIFIED_20=false
NOTIFIED_15=false

while true; do
    CAPACITY=$(cat "$BAT/capacity")
    STATUS=$(cat "$BAT/status")

    if [[ "$STATUS" == "Discharging" ]]; then
        if [[ $CAPACITY -le 15 && $NOTIFIED_15 == false ]]; then
            notify-send -u critical "Battery Low" "Remaining: ${CAPACITY}%"
            NOTIFIED_15=true
        elif [[ $CAPACITY -le 20 && $CAPACITY -gt 15 && $NOTIFIED_20 == false ]]; then
            notify-send -u normal "Battery Low" "Remaining: ${CAPACITY}%"
            NOTIFIED_20=true
        elif [[ $CAPACITY -gt 20 ]]; then
            NOTIFIED_20=false
            NOTIFIED_15=false
        fi
    else
        NOTIFIED_20=false
        NOTIFIED_15=false
    fi

    sleep 60
done

To change the first notification to 10% you have to change the line to

elif [[ $CAPACITY -le 10 && $CAPACITY -gt 15 && $NOTIFIED_20 == false ]]; then
    notify-send -u normal "Battery Low" "Remaining: ${CAPACITY}%"
    NOTIFIED_20=true

If you want to change the critical notification you have to change to

if [[ $CAPACITY -le 8 && $NOTIFIED_15 == false ]]; then
    notify-send -u critical "Battery Low" "Remaining: ${CAPACITY}%"
    NOTIFIED_15=true

[tetam01]

Dont forget to change these values too:

NOTIFIED_20=false
NOTIFIED_15=false

[claud2893]

Thank you! I have edited the script as follows, and now everything work except for the fact that the notifications of 15% and 8% come respectively at 14% and 7%. Any idea of why does this occur?

#!/bin/bash

BAT=$(command ls -d /sys/class/power_supply/BAT* 2>/dev/null | head -n 1)
if [[ -z "$BAT" ]]; then
    exit 0
fi

NOTIFIED_15=false
NOTIFIED_8=false

while true; do
    CAPACITY=$(cat "$BAT/capacity")
    STATUS=$(cat "$BAT/status")

    if [[ "$STATUS" == "Discharging" ]]; then
        if [[ $CAPACITY -le 8 && $NOTIFIED_8 == false ]]; then
            notify-send -u critical "Battery Low" "Remaining: ${CAPACITY}%"
            NOTIFIED_8=true
        elif [[ $CAPACITY -le 15 && $CAPACITY -gt 8 && $NOTIFIED_15 == false ]]; then
            notify-send -u normal "Battery Low" "Remaining: ${CAPACITY}%"
            NOTIFIED_15=true
        elif [[ $CAPACITY -gt 15 ]]; then
            NOTIFIED_15=false
            NOTIFIED_8=false
        fi
    else
        NOTIFIED_15=false
        NOTIFIED_8=false
    fi

    sleep 60
done

[tetam01]

I'm not sure but I think this is because of when the script checks the value.

The script runs in a loop (e.g. while true; do ... sleep 60; done) and reads the battery level at certain intervals.
If the battery drops from 9% to 7% between two loop cycles, for example,
the ‘8%’ status is never seen exactly – by the next cycle, it is already lower, i.e. 7%, and then -le 8 takes effect.

[mylinuxforwork]

I'm not sure but I think this is because of when the script checks the value.

The script runs in a loop (e.g. while true; do ... sleep 60; done) and reads the battery level at certain intervals. If the battery drops from 9% to 7% between two loop cycles, for example, the ‘8%’ status is never seen exactly – by the next cycle, it is already lower, i.e. 7%, and then -le 8 takes effect.

Correct. It's not a real time information. It's a frequent check.