Accessing CPU temperature in python

Question

I need an example code for accessing CPU temperature in python.

I\'m running windows 7, BTW.

Answer 1

Check out the cputemp library.

EDIT: on windows, you might be able to convert this IronPython script which uses WMI using the python WMI library.

Answer 2

The code offered by eadmaster may work for older CPUs that OpenHardwareMonitor has been programmed for, but I have a Skylake i7 6700K CPU. OpenHardwareMonitor offered no results for me. However, there is a fork of this program called CPU Thermometer, which is based on OpenHardwareMonitor which does recognize my CPU.

In chasing down how to get CPU temps via Python, I switched to IronPython in order to have access to the .Net framework and have easy access to other performance data, but it should be fairly easy to figure out how to retro fit it for vanilla Python 2.7 (Just run CPU Thermometer instead ofOpenHardwareMonitor and change your namespace to "root\CPUThermometer"? Could it be that simple?).

#
# CPU Temp --REQUIRES CPU TEMPERATURE TO BE RUNNING!--
#
import clr
clr.AddReference('System.Management')
from System.Management import (ManagementScope, ManagementObject, ManagementObjectSearcher, WqlObjectQuery)

scope = ManagementScope("root\CPUThermometer")

searcher = ManagementObjectSearcher(scope, 
    WqlObjectQuery("SELECT * FROM Sensor Where SensorType LIKE 'Temperature'"), None)

mo = ManagementObject()

print "\n"
print "              Temp      Min       Max"

strout = str(' ')

for mo in searcher.Get():
    strout = '{0}   {1} C    {2} C    {3} C\n{4}'.format(mo["Name"], mo["Value"], mo["Min"], mo["Max"], strout)

print strout

Sample Output:

D:\IronPython 2.7>ipy64 c:\users\neamerjell\desktop\test.py


              Temp      Min       Max
CPU Core #1   21.0 C    20.0 C    37.0 C
CPU Core #2   23.0 C    21.0 C    39.0 C
CPU Core #3   21.0 C    20.0 C    32.0 C
CPU Core #4   21.0 C    20.0 C    36.0 C

I found out the hard way that the query is not quite standard SQL and DOES NOT LIKE the "Order By" clause, so I had to do some fancy string formatting to get the order correct as the query returns the cores in reverse order. This baffled me for a bit until I devised this way around it.

Answer 3

You can use pywin32 to access the native Windows API. I believe it should be possible to query the Windows API for the CPU temperature if the manufacturer for your mainboard driver registers a WMI Data Provider through their driver. Assuming this is the case you could download the pywin32 extensions and the Python WMI module mentioned in the answer by ars, and then proceed as follows:

import wmi
w = wmi.WMI()
print w.Win32_TemperatureProbe()[0].CurrentReading

Looking at the IronPython script in the ars' answer there seems to be another way to do it too, using a different WMI object. Using the same API and approach you could try receiving the temperature value with

w = wmi.WMI(namespace="root\wmi")
temperature_info = w.MSAcpi_ThermalZoneTemperature()[0]
print temperature_info.CurrentTemperature

which apparently should return the temperature value in tenths of Kelvin, thus to receive the degree in Celsius I guess you just divide this value by 10 and subtract ~273.

Answer 4

I received a C++ project from a 3rd party and found how to get the CPU and Board Temp using C++. I then found this which I used to to help me mimic the C++ functions in python with ctypes, a lot of this code is copied directly from that repository. '\\.\AdvLmDev' is specific to the PC I was using, and should be replaced with '\\.\PhysicalDrive0'. There is also a function to get other CPU power measurements. I did this because I didn't want to use Open Hardware Monitor. You may have to run the code as administrator for it to work.

import ctypes
import ctypes.wintypes as wintypes
from ctypes import windll


LPDWORD = ctypes.POINTER(wintypes.DWORD)
LPOVERLAPPED = wintypes.LPVOID
LPSECURITY_ATTRIBUTES = wintypes.LPVOID

GENERIC_READ = 0x80000000
GENERIC_WRITE = 0x40000000
GENERIC_EXECUTE = 0x20000000
GENERIC_ALL = 0x10000000

FILE_SHARE_WRITE=0x00000004
ZERO=0x00000000

CREATE_NEW = 1
CREATE_ALWAYS = 2
OPEN_EXISTING = 3
OPEN_ALWAYS = 4
TRUNCATE_EXISTING = 5

FILE_ATTRIBUTE_NORMAL = 0x00000080

INVALID_HANDLE_VALUE = -1
FILE_DEVICE_UNKNOWN=0x00000022
METHOD_BUFFERED=0
FUNC=0x900
FILE_WRITE_ACCESS=0x002

NULL = 0
FALSE = wintypes.BOOL(0)
TRUE = wintypes.BOOL(1)


def CTL_CODE(DeviceType, Function, Method, Access): return (DeviceType << 16) | (Access << 14) | (Function <<2) | Method




def _CreateFile(filename, access, mode, creation, flags):
    """See: CreateFile function http://msdn.microsoft.com/en-us/library/windows/desktop/aa363858(v=vs.85).asp """
    CreateFile_Fn = windll.kernel32.CreateFileW
    CreateFile_Fn.argtypes = [
            wintypes.LPWSTR,                    # _In_          LPCTSTR lpFileName
            wintypes.DWORD,                     # _In_          DWORD dwDesiredAccess
            wintypes.DWORD,                     # _In_          DWORD dwShareMode
            LPSECURITY_ATTRIBUTES,              # _In_opt_      LPSECURITY_ATTRIBUTES lpSecurityAttributes
            wintypes.DWORD,                     # _In_          DWORD dwCreationDisposition
            wintypes.DWORD,                     # _In_          DWORD dwFlagsAndAttributes
            wintypes.HANDLE]                    # _In_opt_      HANDLE hTemplateFile
    CreateFile_Fn.restype = wintypes.HANDLE

    return wintypes.HANDLE(CreateFile_Fn(filename,
                         access,
                         mode,
                         NULL,
                         creation,
                         flags,
                         NULL))


handle=_CreateFile('\\\\.\\AdvLmDev',GENERIC_WRITE,FILE_SHARE_WRITE,OPEN_EXISTING,ZERO)

def _DeviceIoControl(devhandle, ioctl, inbuf, inbufsiz, outbuf, outbufsiz):
    """See: DeviceIoControl function
http://msdn.microsoft.com/en-us/library/aa363216(v=vs.85).aspx
"""
    DeviceIoControl_Fn = windll.kernel32.DeviceIoControl
    DeviceIoControl_Fn.argtypes = [
            wintypes.HANDLE,                    # _In_          HANDLE hDevice
            wintypes.DWORD,                     # _In_          DWORD dwIoControlCode
            wintypes.LPVOID,                    # _In_opt_      LPVOID lpInBuffer
            wintypes.DWORD,                     # _In_          DWORD nInBufferSize
            wintypes.LPVOID,                    # _Out_opt_     LPVOID lpOutBuffer
            wintypes.DWORD,                     # _In_          DWORD nOutBufferSize
            LPDWORD,                            # _Out_opt_     LPDWORD lpBytesReturned
            LPOVERLAPPED]                       # _Inout_opt_   LPOVERLAPPED lpOverlapped
    DeviceIoControl_Fn.restype = wintypes.BOOL

    # allocate a DWORD, and take its reference
    dwBytesReturned = wintypes.DWORD(0)
    lpBytesReturned = ctypes.byref(dwBytesReturned)

    status = DeviceIoControl_Fn(devhandle,
                  ioctl,
                  inbuf,
                  inbufsiz,
                  outbuf,
                  outbufsiz,
                  lpBytesReturned,
                  NULL)

    return status, dwBytesReturned

class OUTPUT_temp(ctypes.Structure):
        """See: http://msdn.microsoft.com/en-us/library/aa363972(v=vs.85).aspx"""
        _fields_ = [
                ('Board Temp', wintypes.DWORD),
                ('CPU Temp', wintypes.DWORD),
                ('Board Temp2', wintypes.DWORD),
                ('temp4', wintypes.DWORD),
                ('temp5', wintypes.DWORD)
                ]

class OUTPUT_volt(ctypes.Structure):
        """See: http://msdn.microsoft.com/en-us/library/aa363972(v=vs.85).aspx"""
        _fields_ = [
                ('VCore', wintypes.DWORD),
                ('V(in2)', wintypes.DWORD),
                ('3.3V', wintypes.DWORD),
                ('5.0V', wintypes.DWORD),
                ('temp5', wintypes.DWORD)
                ]

def get_temperature():
    FUNC=0x900
    outDict={}

    ioclt=CTL_CODE(FILE_DEVICE_UNKNOWN, FUNC, METHOD_BUFFERED, FILE_WRITE_ACCESS)

    handle=_CreateFile('\\\\.\\AdvLmDev',GENERIC_WRITE,FILE_SHARE_WRITE,OPEN_EXISTING,ZERO)

    win_list = OUTPUT_temp()
    p_win_list = ctypes.pointer(win_list)
    SIZE=ctypes.sizeof(OUTPUT_temp)


    status, output = _DeviceIoControl(handle, ioclt , NULL, ZERO, p_win_list, SIZE)


    for field, typ in win_list._fields_:
                #print ('%s=%d' % (field, getattr(disk_geometry, field)))
                outDict[field]=getattr(win_list,field)
    return outDict

def get_voltages():
    FUNC=0x901
    outDict={}

    ioclt=CTL_CODE(FILE_DEVICE_UNKNOWN, FUNC, METHOD_BUFFERED, FILE_WRITE_ACCESS)

    handle=_CreateFile('\\\\.\\AdvLmDev',GENERIC_WRITE,FILE_SHARE_WRITE,OPEN_EXISTING,ZERO)

    win_list = OUTPUT_volt()
    p_win_list = ctypes.pointer(win_list)
    SIZE=ctypes.sizeof(OUTPUT_volt)


    status, output = _DeviceIoControl(handle, ioclt , NULL, ZERO, p_win_list, SIZE)


    for field, typ in win_list._fields_:
                #print ('%s=%d' % (field, getattr(disk_geometry, field)))
                outDict[field]=getattr(win_list,field)
    return outDict

Answer 5

Use the WMI module + Open Hardware Monitor + its WMI interface described here.

Sample code:

import wmi
w = wmi.WMI(namespace="root\OpenHardwareMonitor")
temperature_infos = w.Sensor()
for sensor in temperature_infos:
    if sensor.SensorType==u'Temperature':
        print(sensor.Name)
        print(sensor.Value)

Answer 6

I have used the utility from https://github.com/BennyCarbajal/PyTherm

Pretty much install pythonnet with:

pip install pythonnet

Then just execute the terminal as administrator and finally execute the file:

python pytherm.py

It also works if you run it as a regular user but will not output as much data.

Since it returns the data in JSON format, it should be easy for you to just get the data of the specific hardware you are looking for.