How to get CPU temperature

Question

I need to gather some system s information for the application I m developing  The memory available and the CPU load are easy to get using C   Unfortunately  the CPU temperature it s not that easy  I have tried using WMI but I couldn t get anything using  Win32 TemperatureProbe   or  MSAcpi ThermalZoneTemperature   Has anybody already dealt with this issue  I m wondering how monitoring programs  as SiSoftware Sandra  can get that information     Just in case anybody is interested  here is the code of the class   public class SystemInformation       private System Diagnostics PerformanceCounter m memoryCounter      private System Diagnostics PerformanceCounter m CPUCounter       public SystemInformation                 m memoryCounter   new System Diagnostics PerformanceCounter            m memoryCounter CategoryName    Memory           m memoryCounter CounterName    Available MBytes            m CPUCounter   new System Diagnostics PerformanceCounter            m CPUCounter CategoryName    Processor           m CPUCounter CounterName      Processor Time           m CPUCounter InstanceName     Total               public float GetAvailableMemory                 return m memoryCounter NextValue               public float GetCPULoad                 return m CPUCounter NextValue               public float GetCPUTemperature                               return 0

User · Answer

For others who may come by here  maybe take a look at   http   openhardwaremonitor org    Follow that link and at first you might think   hey that s an Application  that is why it was removed  the question was how to do this from C  code  not to find an application that can tell me the temperature     This is where it shows you are not willing to invest enough time in reading what  Open Hardware Monitor  also is   They also include a Data Interface  here is the description      Data Interface   The Open Hardware Monitor publishes all sensor data to   WMI  Windows Management Instrumentation   This allows other   applications to read and use the sensor information as well  A   preliminary documentation of the interface can be found here click     When you download it  it contains the OpenHardwareMonitor exe application  you re not looking for that one  It also contains the OpenHardwareMonitorLib dll  you re looking for that one   It is mostly  if not 100   just a wrapper around the WinRing0 API  which you could choose to wrap your self if you feel like it   I have tried this out from a C  app myself  and it works  Although it is still in beta  it seemed rather stable  It is also open source so it could be a good starting point instead   At the end of the day I find it hard to believe that is not on topic of this question

User · Answer

You can give the Open Hardware Monitor a go  although it lacks support for the latest processors   internal sealed class CpuTemperatureReader   IDisposable       private readonly Computer  computer       public CpuTemperatureReader                  computer   new Computer   CPUEnabled   true             computer Open               public IReadOnlyDictionary lt string  float gt  GetTemperaturesInCelsius                 var coreAndTemperature   new Dictionary lt string  float gt              foreach  var hardware in  computer Hardware                        hardware Update      use hardware Name to get CPU model             foreach  var sensor in hardware Sensors                                if  sensor SensorType    SensorType Temperature  amp  amp  sensor Value HasValue                      coreAndTemperature Add sensor Name  sensor Value Value                                    return coreAndTemperature             public void Dispose                 try                        computer Close                      catch  Exception                          ignore closing errors                     Download the zip from the official source  extract and add a reference to OpenHardwareMonitorLib dll in your project

User · Answer

I m pretty sure it s manufacturer dependent  since they will be accessed through an I O port  If you have a specific board you re trying to work with  try looking through the manuals and or contacting the manufacturer   If you want to do this for a lot of different boards  I d recommend contacting someone at something like SiSoftware or be prepared to read a LOT of motherboard manuals   As another note  not all boards have temperature monitors   You also might run into problems getting privileged access from the kernel

User · Answer

There is a blog post with some C  sample code on how to do it here

User · Answer

It s depends on if your computer support WMI  My computer can t run this WMI demo too    But I successfully get the CPU temperature via Open Hardware Monitor  Add the Openhardwaremonitor reference in Visual Studio  It s easier  Try this  using System  using System Collections Generic  using System Linq  using System Text  using System Threading Tasks  using OpenHardwareMonitor Hardware  namespace Get CPU Temp5      class Program             public class UpdateVisitor   IVisitor                     public void VisitComputer IComputer computer                              computer Traverse this                           public void VisitHardware IHardware hardware                              hardware Update                   foreach  IHardware subHardware in hardware SubHardware  subHardware Accept this                           public void VisitSensor ISensor sensor                 public void VisitParameter IParameter parameter                      static void GetSystemInfo                       UpdateVisitor updateVisitor   new UpdateVisitor               Computer computer   new Computer               computer Open               computer CPUEnabled   true             computer Accept updateVisitor              for  int i   0  i  lt  computer Hardware Length  i                                if  computer Hardware i  HardwareType    HardwareType CPU                                      for  int j   0  j  lt  computer Hardware i  Sensors Length  j                                                if  computer Hardware i  Sensors j  SensorType    SensorType Temperature                                 Console WriteLine computer Hardware i  Sensors j  Name         computer Hardware i  Sensors j  Value ToString       r                                                                  computer Close                    static void Main string   args                      while  true                              GetSystemInfo                                   You need to run this demo as administrator   You can see the tutorial here  http   www lattepanda com topic-f11t3004 html

User · Answer

I extracted the CPU part from Open Hardware Monitor into a separated library  exposing sensors and members normally hidden into OHM  It also includes many updates  like the support for Ryzen and Xeon  because on OHM they don t accept pull requests since 2015   https   www nuget org packages HardwareProviders CPU Standard    Let know your opinion

User · Answer

It can be done in your code via WMI  I ve found a tool from Microsoft that creates code for it      The WMI Code Creator tool allows you to generate VBScript  C   and VB    NET code that uses WMI to complete a management task such as querying   for management data  executing a method from a WMI class  or receiving   event notifications using WMI    You can download it here

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I know this post is old  but just wanted to add a comment if somebody should be looking at this post and trying to find a solution for this problem   You can indeed read the CPU temperature very easily in C  by using a WMI approach   To get a Celsius value  I have created a wrapper that converts the value returned by WMI and wraps it into an easy to use object   Please remember to add a reference to the System Management dll in Visual Studio   using System  using System Collections Generic  using System Linq  using System Text  using System Management   namespace RCoding Common Diagnostics SystemInfo       public class Temperature               public double CurrentValue   get  set            public string InstanceName   get  set            public static List lt Temperature gt  Temperatures                       get                               List lt Temperature gt  result   new List lt Temperature gt                     ManagementObjectSearcher searcher   new ManagementObjectSearcher   root WMI    SELECT   FROM MSAcpi ThermalZoneTemperature                    foreach  ManagementObject obj in searcher Get                                          Double temp   Convert ToDouble obj  CurrentTemperature   ToString                         temp    temp - 2732    10 0                      result Add new Temperature   CurrentValue   temp  InstanceName   obj  InstanceName   ToString                                         return result                                     Update 25 06 2010    Just saw that a link was posted to the same kind of solution above    Anyway  I will leave this piece of code if somebody should want to use it  -

[c#] How to get CPU temperature?

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