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Title: AXP209 battery monitor official script
Post by: vazhnov on April 19, 2021, 12:40:17 AM

Hello!

Is there are official way to monitor LiPo battery voltage/status on Olimex Allwinner boards in Linux? I found some "axp209.sh (https://github.com/vazhnov/sunxi-axp209/blob/dev/axp209.sh)" for CHIP board, but it requires some polishing...

Title: Re: AXP209 battery monitor official script
Post by: LubOlimex on April 19, 2021, 02:31:15 PM

I don't think we have such but you can find info about the battery under /sys/class/power_supply/axp20x-battery/ for example:

root@a20-olinuxino:~# cat /sys/class/power_supply/axp20x-battery/voltage_now
4192000
root@a20-olinuxino:~# cat /sys/class/power_supply/axp20x-battery/voltage_max_design
4200000

Title: Re: AXP209 battery monitor official script
Post by: vazhnov on April 21, 2021, 01:05:07 AM

Good, as I see Armbian already uses it in /etc/update-motd.d/30-armbian-sysinfo:

Code Select

function batteryinfo() {
	# Battery info for Allwinner
	mainline_dir="/sys/power/axp_pmu"
	legacy_dir="/sys/class/power_supply"
...

Code Select

lime2:~:% bash /etc/update-motd.d/30-armbian-sysinfo
System load:   7%           	Up time:       1:23
Memory usage:  6% of 998M   	IP:            192.168.1.182
CPU temp:      39°C           	Usage of /:    4% of 30G    	Battery:       92% discharging

Olimex Support Forum

OLinuXino Android / Linux boards and System On Modules => A20 => Topic started by: vazhnov on April 19, 2021, 12:40:17 AM