read the battery status on an HP notebook under WIN11.

kendo

I would like to read the battery status on an HP notebook under WIN11.
Use Qt_5_15_0_MinGW_64_bit

// Display BAT SOC
// ---------------------------
// https://learn.microsoft.com/en-us/windows/win32/api/winbase/ns-winbase-system_power_status

    _SYSTEM_POWER_STATUS *power = new _SYSTEM_POWER_STATUS;

    qDebug() << "BAT SOC   = " << power->BatteryLifePercent;
    qDebug() << "ACLineStatus = " << power->ACLineStatus;

unfortunately no success with this approach: values are always 0

OUTPUT:

BAT SOC   =  0
ACLineStatus =  0

could anyone help....thank you very much

JonB

@kendo
This has nothing to do with Qt, it's just a Windows SDK call which you should investigate.

Since all you do is create the struct _SYSTEM_POWER_STATUS its values are meaningless. Don't you think you should call GetSystemPowerStatus function on it?

posktomten

Try this:

#include <QCoreApplication>
#include <QDebug>
#include <Windows.h>



int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);
    SYSTEM_POWER_STATUS status;

    if(!GetSystemPowerStatus(&status)) {
        qDebug() << "Failed to get system power status";
    } else {
        switch(status.ACLineStatus) {
            case 0:
                qDebug() << "AC Line Status: Offline.";
                break;

            case 1:
                qDebug() << "AC Line Status: Online.";
                break;

            case 255:
                qDebug() << "AC Line Status: Unknown.";
                break;

            default:
                qDebug() << "AC Line Status: An error occured.";
        }

        switch(status.BatteryFlag) {
            case 1:
                qDebug() << "Battery Flag: High—the battery capacity is at more than 66 percent.";
                break;

            case 2:
                qDebug() << "Battery Flag:Low—the battery capacity is at less than 33 percen.";
                break;

            case 4:
                qDebug() << "Battery Flag: Critical—the battery capacity is at less than five percent.";
                break;

            case 8:
                qDebug() << "Battery Flag: Charging.";
                break;

            case 128:
                qDebug() << "Battery Flag: No system battery.";
                break;

            case 255:
                qDebug() << "Battery Flag: Unknown status—unable to read the battery flag information.";
                break;

            default:
                qDebug() << "Battery Flag: An error occured.";
        }

        qDebug() << "Battery Life Percent: " << status.BatteryLifePercent << "%.";

        switch(status.SystemStatusFlag) {
            case 0:
                qDebug() << "System Status Flag: Battery saver is off.";
                break;

            case 1:
                qDebug() << "System Status Flag: Battery saver on. Save energy where possible.";
                break;

            default:
                qDebug() << "System Status Flag: An error occured.";
        }
    }

    return a.exec();
}

Reference:
https://learn.microsoft.com/en-us/windows/win32/api/winbase/ns-winbase-system_power_status

MinGW GCC Qt5.15.2 "SystemStatusFlag" Does not work
MSVC Qt5.15.2 Works
MinGW GCC Qt5.15.8 "SystemStatusFlag" Does not work
MSVC Qt5.15.8 Works
MinGW GCC Qt6.4.3"SystemStatusFlag" Does not work
MSVC Qt6.4.3 Works

posktomten

@kendo said in read the battery status on an HP notebook under WIN11.:

_SYSTEM_POWER_STATUS *power = new _SYSTEM_POWER_STATUS;

qDebug() << "BAT SOC   = " << power->BatteryLifePercent;
qDebug() << "ACLineStatus = " << power->ACLineStatus;

This should work, good luck!

SYSTEM_POWER_STATUS  power; 
//if(!GetSystemPowerStatus(&status)) {
if(GetSystemPowerStatus(&status)) {
qDebug() << "BAT SOC   = " <<   power.BatteryLifePercent;
qDebug() << "ACLineStatus = " << power.ACLineStatus;
}

JonB

@posktomten I think you meant if(GetSystemPowerStatus(&power)) {

posktomten

@JonB said in read the battery status on an HP notebook under WIN11.:

I think you meant if(GetSystemPowerStatus(&power)) {

Yeah haha! I had an example where "An error occurred" was printed if it didn't work. And forgot to change.
Does it work?

JonB

@posktomten said in read the battery status on an HP notebook under WIN11.:

Does it work?

I wouldn't know :)

kendo

it works !!!

Now I can send a switch-off message to my USB-PD-Charger if (SOC >= 80%):
It's a pity that this cannot be parameterized in the WIN11 setup. (or in HP BIOS)

Thanks and have a nice week end!

JonB

@kendo
My HP laptop has a parameter in the BIOS, which I have never changed, so that it only ever charges to 80%. Dunno what that is about.