06-13-2024, 03:35 AM | #1366 |
Wizard
Posts: 1,183
Karma: 15499942
Join Date: Sep 2022
Device: Kobo Libra 2
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As far as I can tell, Kobo's battery meter has significant drift based on your charging habits. If you try to follow the guidance of keeping the battery between 25 - 75%, the meter starts to think that 75% charged is 100% charged, because it never goes above that point. I now have a > 20% disparity between what the battery icon reports and what the voltage indicates about the charge level. I'll try doing a full charge next time to see if I can get them to line up again.
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06-13-2024, 01:55 PM | #1367 | |
Member
Posts: 24
Karma: 32
Join Date: Oct 2020
Location: New York, USA
Device: Clara HD, PRS-350
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Quote:
-rw-r--r-- 1 root root 4096 Jun 7 09:47 uevent -r--r--r-- 1 root root 4096 Jun 7 09:48 status -r--r--r-- 1 root root 4096 Jun 7 09:48 time_to_full_now -r--r--r-- 1 root root 4096 Jun 7 09:48 capacity -r--r--r-- 1 root root 4096 Jun 7 09:48 voltage_now -rw-r--r-- 1 root root 4096 Jun 7 09:48 voltage_min_design -r--r--r-- 1 root root 4096 Jun 7 09:48 type -r--r--r-- 1 root root 4096 Jun 7 09:48 time_to_empty_now -r--r--r-- 1 root root 4096 Jun 7 09:48 temp -r--r--r-- 1 root root 4096 Jun 7 09:48 technology -r--r--r-- 1 root root 4096 Jun 7 09:48 present drwxr-xr-x 2 root root 0 Jun 7 09:48 power -r--r--r-- 1 root root 4096 Jun 7 09:48 health -r--r--r-- 1 root root 4096 Jun 7 09:48 current_now Unfortunately, no voltage_max or charge_full. |
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06-14-2024, 06:05 PM | #1368 |
Enthusiast
Posts: 46
Karma: 500000
Join Date: Dec 2011
Device: Kobo Libra 2
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I have obviously missed doing something basic in trying to set this up on my libra 2. What am I doing wrong?
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06-14-2024, 06:24 PM | #1369 |
Wizard
Posts: 1,183
Karma: 15499942
Join Date: Sep 2022
Device: Kobo Libra 2
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My guess would be that you copied the script into a text editor that uses Windows line endings (CRLF), instead of Linux line endings (LF). You need to use a different text editor, such as Notepad++, to convert the script to Linux line endings. I use MadEdit for such purposes, myself.
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06-14-2024, 08:54 PM | #1370 | |
Enthusiast
Posts: 46
Karma: 500000
Join Date: Dec 2011
Device: Kobo Libra 2
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Quote:
Edit: Telnet to my libra 2 shows the file structure to be similar to the Clara HD listed a couple of posts above. Last edited by jillmess; 06-15-2024 at 04:14 AM. |
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Yesterday, 06:41 PM | #1371 |
Wizard
Posts: 1,123
Karma: 4234828
Join Date: Feb 2012
Location: Cape Canaveral
Device: Kindle Scribe
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Here is what is available for Kobo Clara HD in battcalc.sh:
Code:
# Battery Statistics Calculator 1.1 (2024-05-25) by Aleron Ives # Modified for Kobo Clara HD by mergen3107 # This script calculates battery statistics for the Kobo Libra 2. # Check the contents of /sys/class/power_supply/ if you use a different # model to ensure that the statistics you want to track are available. # # You can use NickelMenu to invoke this script like so: # menu_item :main :Battery :cmd_output :500 :/mnt/onboard/.adds/battcalc.sh # Gather the necessary statistics meter=$(cat /sys/class/power_supply/mc13892_bat/capacity) v_now=$(cat /sys/class/power_supply/mc13892_bat/voltage_now) health=$(cat /sys/class/power_supply/mc13892_bat/health) temp=$(cat /sys/class/power_supply/mc13892_bat/temp) # Format the statistics let v_now/=1000; let temp/=10; echo Capacity: $meter % echo Voltage: $v_now mV echo Health: $health echo Temperature: $temp °C Thanks everyone for NickelMenu and this script! |
Yesterday, 07:25 PM | #1372 |
Wizard
Posts: 1,183
Karma: 15499942
Join Date: Sep 2022
Device: Kobo Libra 2
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What does the voltage claim to be if you charge to 100% and then use the Clara for a little while? You'll probably see a nonsensical value like 4.8 V at first, but once it drops, you may be able to estimate what v_max is in order to do the voltage calculations.
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Tags |
kobo, launcher, ldpreload, nickel |
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