MeadowApp.cs

using Meadow;
using Meadow.Devices;
using Meadow.Hardware;
using System;
using System.Threading;
using System.Threading.Tasks;

namespace WakeOnInterrupt;

/// <summary>
/// This sample illustrates putting the device into low-power (sleep) state until an interrupt occurs
/// </summary>
public class MeadowApp : App<F7FeatherV2>
{
    private IDigitalOutputPort _red;
    private IDigitalOutputPort _green;

    public TimeSpan Timespan { get; private set; }

    public override Task Initialize()
    {
        Resolver.Log.Info("Initializing hardware...");

        _red = Device.Pins.OnboardLedRed.CreateDigitalOutputPort(false);
        _green = Device.Pins.OnboardLedGreen.CreateDigitalOutputPort(false);

        Device.PlatformOS.BeforeSleep += () =>
        {
            _red.State = true;
            Resolver.Log.Info("Sleeping...");
        };

        Device.PlatformOS.AfterWake += (e, o) =>
        {
            Thread.Sleep(1000);
            _red.State = false;
            Resolver.Log.Info("Resuming...");

        };

        return Task.CompletedTask;
    }

    public override async Task Run()
    {
        while (true)
        {
            Resolver.Log.Info("Waiting...");
            for (var i = 0; i < 5; i++)
            {
                _green.State = true;
                await Task.Delay(500);
                _green.State = false;
                await Task.Delay(500);
            }
            Device.PlatformOS.Sleep(Device.Pins.D05, InterruptMode.EdgeRising, ResistorMode.InternalPullDown);

            Resolver.Log.Info("Continuing...");
        }
    }
}