CPU Temp

JohnOne · September 2, 2017

I have been using some code to put laptop in to sleep mode when the cpu temp goes over 97 degrees for a number of seconds.

Problem is, it has stopped working sometime over the last couple of months, and just reports 0 as the cpu temp.

I don't think anything has changed on my win 10 x64 OS other than updates.

Here is the code I use...

#RequireAdmin

#include <Date.au3>


$oMyError = ObjEvent("AutoIt.Error", "ErrFunc")

HotKeySet("{INSERT}", Show)

FileDelete("log.txt")


$file = FileOpen("log.txt", 1)
$toohotcount = 0
$sleep = False
While 3
    $temp = _ACPI_Temp()
    FileWrite($file, $temp & @TAB & _Now() & @CRLF)
    ;ConsoleWrite($temp & @LF)
    If $temp >= 97 Then
        $toohotcount += 1
        If $toohotcount >= 4 Then
            FileWrite($file, $temp & @TAB & _Now() & " ##### Whoops!" & @CRLF)
            $toohotcount = 0
            ;FileClose($file)
            _ComputerSleep()
        EndIf
    Else
        $toohotcount = 0
    EndIf

    Sleep(10000)
WEnd

Func Show()
    MsgBox(0, 0, _ACPI_Temp())
EndFunc   ;==>Show

Func _ComputerSleep()
    Beep(400, 1000)
    Shutdown(32)
EndFunc   ;==>_ComputerSleep


Func _ACPI_Temp()
    Local $wbemFlagReturnImmediately = 0x10, $strComputer, $objWMIService, $colItems
    Local $wbemFlagForwardOnly = 0x20
    Local $CurrTemp = "N/A"
    $strComputer = "."
    $objWMIService = ObjGet("winmgmts:\\" & $strComputer & "\root\wmi")
    $colItems = $objWMIService.ExecQuery("SELECT * FROM MSAcpi_ThermalZoneTemperature", "WQL", $wbemFlagReturnImmediately + $wbemFlagForwardOnly)
    For $objItem In $colItems
        $CurrTemp = ($objItem.CurrentTemperature - 2732) / 10
    Next
    Return $CurrTemp
EndFunc   ;==>_ACPI_Temp



Func ErrFunc()
    Beep(400, 1000)
    Shutdown(32)
EndFunc   ;==>ErrFunc

Or just use the following to test...

MsgBox(0, 0, _ACPI_Temp())

Func _ACPI_Temp()
    Local $wbemFlagReturnImmediately = 0x10, $strComputer, $objWMIService, $colItems
    Local $wbemFlagForwardOnly = 0x20
    Local $CurrTemp = "N/A"
    $strComputer = "."
    $objWMIService = ObjGet("winmgmts:\\" & $strComputer & "\root\wmi")
    $colItems = $objWMIService.ExecQuery("SELECT * FROM MSAcpi_ThermalZoneTemperature", "WQL", $wbemFlagReturnImmediately + $wbemFlagForwardOnly)
    For $objItem In $colItems
        $CurrTemp = ($objItem.CurrentTemperature - 2732) / 10
    Next
    Return $CurrTemp
EndFunc   ;==>_ACPI_Temp

Can anyone think why this code might have suddenly stopped doing what it did, correctly?

Gianni · September 2, 2017

Hi @JohnOne it's been a while I did not see you around here... nice to see you again

seems that your script needs admin rights to work...

#RequireAdmin

MsgBox(0, 0, _ACPI_Temp())

Func _ACPI_Temp()
    Local $wbemFlagReturnImmediately = 0x10, $strComputer, $objWMIService, $colItems
    Local $wbemFlagForwardOnly = 0x20
    Local $CurrTemp = "N/A"
    $strComputer = "."
    $objWMIService = ObjGet("winmgmts:\\" & $strComputer & "\root\wmi")
    ConsoleWrite(">-- Debug --> " & IsObj($objWMIService) & @CRLF)
    $colItems = $objWMIService.ExecQuery("SELECT * FROM MSAcpi_ThermalZoneTemperature", "WQL", $wbemFlagReturnImmediately + $wbemFlagForwardOnly)
    For $objItem In $colItems
        ConsoleWrite("-- debug --> " & $objItem.CurrentTemperature & @CRLF)
        $CurrTemp = ($objItem.CurrentTemperature - 2732) / 10
    Next
    Return $CurrTemp
EndFunc   ;==>_ACPI_Temp

JohnOne · September 2, 2017

Do you get a believable temp? What OS?

I just get 0 now, even with admin of course.

Gianni · September 2, 2017

without admin I get N/A,

with admin I get 55.5

Win7 enterprise x64

Gianni · September 2, 2017

same temp in a cmd window using this wmic command:

wmic /namespace:\\root\wmi PATH MSAcpi_ThermalZoneTemperature get CurrentTemperature /value

Edited September 2, 2017 by Chimp

careca · September 2, 2017

I get N/A regardless.

and the wmic cmd says "not supported"

Its win10x64

UEZ · September 2, 2017

You can use the SDK from Core Temp to get the CPU temp.

This is what I did in 2014:

#cs
Shared memory implementation in Core Temp:

Core Temp shares the following structure:

typedef struct core_temp_shared_data
{
    unsigned int    uiLoad[256];
    unsigned int    uiTjMax[128];
    unsigned int    uiCoreCnt;
    unsigned int    uiCPUCnt;
    float       fTemp[256];
    float       fVID;
    float       fCPUSpeed;
    float       fFSBSpeed;
    float       fMultipier;
    char        sCPUName[100];
    unsigned char   ucFahrenheit;
    unsigned char   ucDeltaToTjMax;
}CORE_TEMP_SHARED_DATA,*PCORE_TEMP_SHARED_DATA,**PPCORE_TEMP_SHARED_DATA;

unsigned int is a 32bit unsigned integer.
unsigned char is 8bit (1 byte) in size.

ucFahrenheit and ucDeltaToTjMax represent boolean values. 0 = false, 1 = true.
If ucFahrenheit is set, the temperature is reported in Fahrenheit.
If ucDeltaToTjMax is set, the temperature reported respresents the distance from TjMax.

Core Temp's shared area is named: "CoreTempMappingObject".

C++ Dynamic Link Library:

This DLL was written in C++, and it can be easily used with most programming languages.
There is only a single function. Here is the internal function declaration:

bool __declspec(dllimport) fnGetCoreTempInfo(CORE_TEMP_SHARED_DATA *&pData);

You can declare it in your program in the following manner:

typedef bool (*fnGetCoreTempInfo)(CORE_TEMP_SHARED_DATA *&pData);
fnGetCoreTempInfo GetCoreTempInfo;

For compatibility with some programming languages a function was added.
It uses Win32 API calling convention and is declared as follows:

bool WINAPI fnGetCoreTempInfoAlt(CORE_TEMP_SHARED_DATA *pData);

typedef bool (*fnGetCoreTempInfoAlt)(CORE_TEMP_SHARED_DATA *pData);
fnGetCoreTempInfoAlt GetCoreTempInfo;

Usage:

    * Declare a pointer to CORE_TEMP_SHARED_DATA structure and allocate it.
      It is also recommended to fill the allocated memory with NULL to avoid possible problems.
    * Call the function using the pointer to CORE_TEMP_SHARED_DATA structure as an argument.
      The function will fill the structure if the shared memory was successfully read.
    * The function returns 'true' if succeeded and 'false' if it failed. You can use GetLastError() in case the function fails.
    * In case the function fails due to an exception GetLastError() returns UNKNOWN_EXCEPTION (0x20000000)
#ce
#AutoIt3Wrapper_Run_Au3Stripper=y
#Au3Stripper_Parameters=/so
#AutoIt3Wrapper_UseUpx=n
#AutoIt3Wrapper_Run_After=upx.exe --best --lzma "%out%"
#AutoIt3Wrapper_Run_After=del /f /q GetCoreTempInfo_stripped.au3

If Not FileExists(@ScriptDir & "\GetCoreTempInfo.dll") And (Not ProcessExists("Core Temp.exe") Or Not ProcessExists("Core Temp x64.exe")) Then
    MsgBox(16,"Error", "Core Temp.exe läuft und/oder GetCoreTempInfo.dll existiert nicht", 20)
    Exit
EndIf
$dll = DllOpen(@ScriptDir & "\GetCoreTempInfo.dll")

$CORE_TEMP_SHARED_DATA = DllStructCreate("uint uiLoad[256];"    & _
                                         "uint uiTjMax[128];"   & _
                                         "uint uiCoreCnt;"      & _
                                         "uint uiCPUCnt;"       & _
                                         "float fTemp[256];"    & _
                                         "float fVID;"          & _
                                         "float fCPUSpeed;"     & _
                                         "float fFSBSpeed;"     & _
                                         "float fMultipier;"    & _
                                         "char sCPUName[100];"  & _
                                         "ubyte ucFahrenheit;"  & _
                                         "ubyte ucDeltaToTjMax")

$call = DllCall($dll, "int", "fnGetCoreTempInfoAlt", "struct*", $CORE_TEMP_SHARED_DATA)

$CPU_Name = $CORE_TEMP_SHARED_DATA.sCPUName
$CPU_Speed = Round($CORE_TEMP_SHARED_DATA.fCPUSpeed,0)
$CPU_Cores = $CORE_TEMP_SHARED_DATA.uiCoreCnt
$CPU_FSB_Speed = Round($CORE_TEMP_SHARED_DATA.fFSBSpeed, 0)
$CPU_Multiplicator = $CORE_TEMP_SHARED_DATA.fMultipier
$CPU_Temp = ""
For $i = 1 To $CPU_Cores
    $CPU_Temp &= $CORE_TEMP_SHARED_DATA.fTemp(($i)) & "°/ "
Next
$CPU_Temp = StringTrimRight($CPU_Temp, 2)

MsgBox(0,"Core Temp", _
        "CPU Name: " & $CPU_Name & @CRLF & _
        "CPU Speed: " & $CPU_Speed & " MHz" & @CRLF & _
        "CPU Cores: " & $CPU_Cores & @CRLF & _
        "CPU FSB Speed: " & $CPU_FSB_Speed & " MHz" & @CRLF & _
        "CPU Multiplicator: " & $CPU_Multiplicator & @CRLF & _
        "CPU Temp: " & $CPU_Temp & " C", 30)

$CORE_TEMP_SHARED_DATA = 0
DllClose($dll)

Trong · September 2, 2017

3 hours ago, UEZ said:

You can use the SDK from Core Temp to get the CPU temp.

The DLL uses Core Temp's shared memory feature to read the data.

You need to run "Core Temp.exe" first, so that DLL reads data from shared memory!
I think that is an inconvenience.

JohnOne · September 2, 2017

Thanks guys.

Appreciated.

bolthead · September 3, 2017

Hi not sure if you worked this out yet but here's the console output on my Win 10 Pro which shows what's going wrong on my PC

>-- Debug --> 1
-- debug --> 3072
-- debug --> 2732

HTH

MarcElser · January 6, 2022

Using the SAcpi_ThermalZoneTemperature from wmic is a bad idea. In gneral this returns temperatures from different areas on the Motherboard not the CPU Temp and the drivers need to support it. On my Ryzen I also get values that make no sense like 160°C (value of 4002, 3302, etc.) unless these values are in Degrees Fahrenheit so you even don't know if it's in Degrees Celsius or Fahrenheit.

The Solution Posted by @UEZ still works but the description is bit short even with additional comment from @VIP it took me some time to figure out. So I hope these Steps clarify the process a bit more for future users:

Get @UEZs script and save it somewhere
Install Core Temp and run it
Get the SDK of Core Temp and look in The Folder Path "Shared Memory Framework for Native\Shared Memory Libraries\x64" or "...\x86" for GetCoreTempInfo.dll and copy it to the script location (64-bit or 32-bit)
Run Script and enjoy output and modify to your liking

Jos · January 7, 2022

@MarcElser, Guess you didn't notice that the thread is +4 years old?

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CPU Temp

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