Example for a C# .NET Home-Assistant consuming app

wakeupapp-homeassistant.cs

using System.Threading.Tasks;
using NLog;
using Rille.Hass.ApiProxy;
using Rille.Hass.AppStarter;
using Rille.Hass.Models.StateChangeEventGraph;

namespace HassLab.Console.HassApps
{
    public class WakeUpApp : IHassApp
    {
        public string EntityIdentifierFilter { get; set; } = "automation.wakeup_*"; // <-- yes, wildcards are supported!

        // Dependencies (IoC or Factories not supported right now)
        private readonly Logger _logger = LogManager.GetCurrentClassLogger();
        private readonly HassApiProxy _hassApiProxy = new HassApiProxy(new ApiConfigForHass { BaseUrl = "http://192.168.0.201:8123/api" });

        public async Task ExecuteAsync(EntityStateChangeData e, string dataUntouched)
        {
            if (e.OldState != "on" || e.NewState != "on")
                return; // A trigger for an automation has both these states set to "on" by some reason.

            _logger.Info($"Executing {nameof(WakeUpApp)} for [{e.Entity}]");

            // Turn on all lamps
            await TurnOnLightFor("light.dimmer_vardagsrum_level", 155);
            await TurnOnLightFor("light.dimmer_minihall_level", 155);
            await TurnOnLightFor("light.dimmer_hall_level", 155);
            await TurnOnLightFor("light.led_sovrum_tak_level", 255);
        }

        private async Task TurnOnLightFor(string entityId, int brightness)
        {
            dynamic jsonObj = new
            {
                entity_id = entityId,
                brightness
            };
            await _hassApiProxy.CallHassService("light", "turn_on", jsonObj);
        }
    }
}