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.