BatteryLifeTool

Time: 8-24-19 12:36:36

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Configuration settings

{
    "version": "1.0",
    // 90%
    "MaxBatteryLevelPercent": "90",
    // 15%
    "MinBatteryLevelPercent": "15",
    // Scan Interval. 1000 means 1 second.
    "ScanInterval": "30000"
}

Background

Lenovo computers have such a feature: Maintain the powerlevel at 55% to 60%, known as the Power conservation mode. It is benefit to someone using the computer only at their office or home. But When you suddenly want to go out for business, 60% of the power is seen to be not enough.

If Charging threshold can set to 80% or above, it will be helpful. But I learn that only the Thinkpad laptops have this feature.

So I think if I can charge the scheduled power in the normal charging mode, then switch to the power conservation mode, then I can achieve what I want, maintain the high power conservation mode.

But I don’t know the API of the Lenovo Battery Driver. Maybe this program is not as good as I expected.

Code Core

Windows API

#include <windows.h>
//Freq : The voice Freq.
//Duration ： Duration of the voice.
Beep(Freq, Duration);

//MilliSecond : unsigned long
Sleep(MilliSecond);

// typedef struct _SYSTEM_POWER_STATUS {
//     BYTE ACLineStatus;
//     BYTE BatteryFlag;
//     BYTE BatteryLifePercent;
//     BYTE Reserved1;
//     DWORD BatteryLifeTime;
//     DWORD BatteryFullLifeTime;
// };
// BYTE : char / short.
typedef struct _SYSTEM_POWER_STATUS SYSTEM_POWER_STATUS, *LPSYSTEM_POWER_STATUS;
SYSTEM_POWER_STATUS sysPower = { 0 };
GetSystemPowerStatus(&sysPower);

cJSON

cJSON Click Here.

cjsondb = cJSON_Parse(jsondb.c_str());
cJSON_Print(cjsondb);
char* val = cJSON_GetObjectItem(cjsondb, "version");

What I learn in this experience

Add an icon to the program

Create a New file and name it: resource.rc. Edit the file with a text editor. File content:

id ICON “/path to icon file (.ico)”

Open the Folder in the powershell.

Command:

windres resource.rc resource.o

And then link the resource.o to the executable output.

Package installation package(.msi)

Download the application: Advanced installer.

Git Problem

An error: warning: LF will be replaced by CRLF was raised when executing the command: git add .. Command:

git config --global core.autocrlf true

How to push the Project to Github?