C# - how to get a CPU temp / CPU load / current voltage / VID voltage / current frequency with oper hardware monitor or librehardwaremonitor?

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For my C# .Net Framework project I need to get 5 values:

1) CPU Load
2) CPU Temp
3) Current Voltage
4) VID Voltage
5) Current Frequency

After doing some research, I figured that the best way to obtain those values would be to use OpenHardwareMonitor or LibreHardwareMonitor (Git).

So, I installed LibreHardwareMonitor NuGet, it's added all references and the sample code from GitHub compiles, but the console closes immediately.

From the sample code below, you can tell that it outputs every single metric that it can obtain, while I need just those 5 values that I mentioned above.

If anyone has experience with LibreHardwareMonitor or OpenHardwareMonitor, I would truly appreciate it if you would tell me how to get just those values that I need.

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) { }
}

public void Monitor()
{
    Computer computer = new Computer
    {
        IsCpuEnabled = true,
        IsGpuEnabled = true,
        IsMemoryEnabled = true,
        IsMotherboardEnabled = true,
        IsControllerEnabled = true,
        IsNetworkEnabled = true,
        IsStorageEnabled = true
    };

    computer.Open();
    computer.Accept(new UpdateVisitor());

    foreach (IHardware hardware in computer.Hardware)
    {
        Console.WriteLine("Hardware: {0}", hardware.Name);
        
        foreach (IHardware subhardware in hardware.SubHardware)
        {
            Console.WriteLine("\tSubhardware: {0}", subhardware.Name);
            
            foreach (ISensor sensor in subhardware.Sensors)
            {
                Console.WriteLine("\t\tSensor: {0}, value: {1}", sensor.Name, sensor.Value);
            }
        }

        foreach (ISensor sensor in hardware.Sensors)
        {
            Console.WriteLine("\tSensor: {0}, value: {1}", sensor.Name, sensor.Value);
        }
    }
    
    computer.Close();
}

What I have tried:

I tried WMI, but it doesn't work with modern CPUs, and can't get those values correctly.

Posted 18-Dec-21 17:18pm

John Bon Jovy

Updated 19-Dec-21 2:25am

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Richard MacCutchan 19-Dec-21 3:45am

Are you running the program inside Visual Studio? If so you need to add the line Console.ReadLine(); at the end of the program. This will prevent it closing immediately.

If that is not the case then you need to provide more information.

John Bon Jovy 19-Dec-21 14:47pm

Thanks! The problem is not closing by itself, but my inability to get values from the sensors.
I plainly want to get something like:
label1.Text = Voltage.ToString();
But regardless what I try, I can't manage to do that.

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0x01AA · Accepted Answer · 2021-12-19T02:25:00

Solution 1

ISensor supports a property SensorType SensorType which is defined in ISensor like this:

public enum SensorType
{
    Voltage, // V
    Current, // A
    Power, // W
    Clock, // MHz
    Temperature, // °C
    Load, // %
    Frequency, // Hz
    Fan, // RPM
    Flow, // L/h
    Control, // %
    Level, // %
    Factor, // 1
    Data, // GB = 2^30 Bytes
    SmallData, // MB = 2^20 Bytes
    Throughput, // B/s
    TimeSpan, // Seconds
}

This makes it easy to filter out your desired values e.g. here

foreach (ISensor sensor in hardware.Sensors)
{
   if (sensor.SensorType == TODO By You: thisorthat) // <<<< Here your desired values *1)
   {
      Console.WriteLine("\tSensor: {0}, value: {1}", sensor.Name, sensor.Value);
   }
}

*1) Either by an ugly "if ((sensor.SensorType == isThis) || (sensor.SensorType == isThat) || ...) or you put your desired values in a e.g. HashSet to make it more elegant ;)

I hope it helps.

Posted 19-Dec-21 2:25am

0x01AA

Updated 19-Dec-21 2:35am

v2

Comments

0x01AA 20-Dec-21 4:25am

Sometething like this should work (sorry, formatting not survived here):

foreach (ISensor sensor in hardware.Sensors)
{
  if (sensor.SensorType == SensorType.Voltage)
  {
      // sensor.Value holds the Voltage. 
      // Continue processing this value according to your needs
  }
  else if (sensor.SensorType == SensorType.Temperature)
  {
      // sensor.Value holds the Temperature
  }
  // and so on ...
}

Richard MacCutchan 20-Dec-21 4:38am

Except that those locally scoped variables will not survive the foreach loop.

John Bon Jovy 20-Dec-21 4:51am

What do you mean?

Richard MacCutchan 20-Dec-21 4:57am

My comment was directed at 0x01AA. However, declaring a variable within the scope of a for loop means that when the loop ends the variable will no longer exist.

0x01AA 20-Dec-21 4:57am

Yes you are right, but the above is only for a first test.

Richard MacCutchan 20-Dec-21 4:58am

But it is still incorrect. How can you tell when the loop ends whether any values were found?

0x01AA 20-Dec-21 5:01am

I think OP is able to manage this. One can e.g. use nullable values and after the foreach one will see which values are not longer null.

Richard MacCutchan 20-Dec-21 5:18am

That will make no difference since, as I keep pointing out, none of the values exist once the loop terminates.

0x01AA 20-Dec-21 5:20am

Of course this nullable values need to be in an outer scope. The one OP put local where only for him to make a first test to verify he can get the value.

Richard MacCutchan 20-Dec-21 5:23am

Then please correct your suggested code, so it is not misleading.

0x01AA 20-Dec-21 7:47am

Done

John Bon Jovy 17-Jan-22 13:05pm

Thank you so much, 0x01AA!
May I ask you: Did you try your code on your own PC? If so, could you get a VCore successfully?

0x01AA 17-Jan-22 14:24pm

You are very welcome.
First of all thank you for accepting and vote.
I tried all on my Laptop (W10) and on a desktop (W8.1).

Please give me un rato, I'm currently under pression at work. But I have to say with LibreHardwareMonitor I was also not able to get VCore. Only with WMI I got some voltages, don't remember which one exactly (because I'm absorbed at work :( )