This library offers an easy integration with the HomeWizard Energy API. It is available via NuGet and can be installed via:

PM> Install-Package Fg.HomeWizard.EnergyApi.Client

To be able to retrieve data that is exposed by your HomeWizard P1 device, you first need to know the hostname of your P1 meter. When your P1 meter is connected with your network, you'll be able to find the hostname in your Host Clients list in your router. For instance:

Find your HomeWizardDevice in your network using its hostname with the HomewizardDeviceResolver:

HomeWizardDevice device = 
    await HomeWizardDeviceResolver.FindHomeWizardDeviceAsync("p1meter-015AB0", logger);

Notice that you need to remove the HW- part of the hostname.

Once the device has been found, you can instantiate a HomeWizardService instance and read out the last readings via the code below:

HomeWizardService service = new HomeWizardService(device);

Measurement currentMeasurement = await service.GetCurrentMeasurementsAsync();