Guilhermes

2026-03-23 17:42:36 +00:00
parent 2f1935bf94
commit 44f456eb29
57 changed files with 1916 additions and 0 deletions
--- a/GuilhermesApp/Pages/SensorPage.xaml.cs
+++ b/GuilhermesApp/Pages/SensorPage.xaml.cs
@@ -0,0 +1,83 @@
+using MQTTnet;
+using System.Text;
+using System.Buffers;
+
+namespace GuilhermesApp.Pages;
+
+public partial class SensorPage : ContentPage
+{
+    private IMqttClient? _mqttClient;
+    private MqttClientOptions? _options;
+    private bool _isLedOn = false;
+
+    public SensorPage()
+    {
+        InitializeComponent();
+        ConfigurarMqtt();
+    }
+
+    private async void ConfigurarMqtt()
+    {
+        try 
+        {
+            // TENTATIVA A: MqttClientFactory (Novo padrão em algumas versões v5)
+            // Se der erro aqui, tenta mudar para: var factory = new MqttFactory();
+            var factory = new MqttClientFactory();
+            _mqttClient = factory.CreateMqttClient();
+
+            _options = new MqttClientOptionsBuilder()
+                .WithTcpServer("broker.hivemq.com", 1883)
+                .Build();
+
+            _mqttClient.ApplicationMessageReceivedAsync += e =>
+            {
+                // Extração manual de bytes para evitar o erro do ToArray
+                var buffer = e.ApplicationMessage.Payload;
+                byte[] payloadBytes = new byte[buffer.Length];
+                buffer.CopyTo(payloadBytes);
+                
+                string payload = Encoding.UTF8.GetString(payloadBytes);
+                
+                MainThread.BeginInvokeOnMainThread(() =>
+                {
+                    if (payload == "PRESSIONADO")
+                    {
+                        StatusLabel.Text = $"Último clique: {DateTime.Now:HH:mm:ss}";
+                        StatusLabel.TextColor = Colors.Green;
+                    }
+                });
+
+                return Task.CompletedTask;
+            };
+
+            await _mqttClient.ConnectAsync(_options);
+            await _mqttClient.SubscribeAsync("guilherme/app/botao");
+        }
+        catch (Exception ex)
+        {
+            System.Diagnostics.Debug.WriteLine($"Erro crítico MQTT: {ex.Message}");
+        }
+    }
+
+    private async void OnLedClicked(object sender, EventArgs e)
+    {
+        if (_mqttClient == null || !_mqttClient.IsConnected)
+        {
+            await DisplayAlert("Erro", "O MQTT não está ligado.", "OK");
+            return;
+        }
+
+        _isLedOn = !_isLedOn;
+        string comando = _isLedOn ? "ON" : "OFF";
+
+        var message = new MqttApplicationMessageBuilder()
+            .WithTopic("guilherme/app/led")
+            .WithPayload(comando)
+            .Build();
+
+        await _mqttClient.PublishAsync(message);
+
+        LedBtn.Text = _isLedOn ? "DESLIGAR LED" : "LIGAR LED";
+        LedBtn.BackgroundColor = _isLedOn ? Colors.Red : Colors.DarkSlateGray;
+    }
+}