public async Task ConnectAsync(string clientId, string username, string password, bool cleanSession, TimeSpan keepAlivePeriod, CancellationToken cancellationToken)
{
var builder = new MqttClientOptionsBuilder()
.WithTcpServer(host, port)
.WithClientId(clientId)
.WithCredentials(username, password)
.WithCleanSession(cleanSession)
.WithKeepAlivePeriod(keepAlivePeriod);
// default is V311, supports V500
// builder.WithProtocolVersion(MqttProtocolVersion.V500);
if (isSsl)
{
builder.WithTls();
}
client.UseConnectedHandler(HandleConnection);
client.UseDisconnectedHandler(HandleDisconnection);
client.ApplicationMessageReceivedHandler = mqttApplicationMessageReceivedHandler;
MqttClientAuthenticateResult connectResult;
try
{
connectResult = await client.ConnectAsync(builder.Build(), cancellationToken);
}
catch (Exception e)
{
throw new MqttException(cause: e);
}
ValidateConnectResult(connectResult);
}
public async Task ConnectAsync()
{
logger.LogInformation($"Connecting MQTT on {settings.Value.HostName}");
await client.ConnectAsync(options, CancellationToken.None);
client.UseApplicationMessageReceivedHandler(async message =>
{
var payload = message.ApplicationMessage.ConvertPayloadToString();
logger.LogInformation($"Received {message.ApplicationMessage.Topic} {payload}");
if (commandActions.TryGetValue(message.ApplicationMessage.Topic, out var command))
{
await command(payload);
}
});
client.UseDisconnectedHandler(p =>
{
logger.LogInformation("MQTT disconnected, terminating application");
applicationLifetime.StopApplication();
});
logger.LogInformation("Connected");
}
public async void ConnectAsync(string ip, string username, string password, List <string> topics)
{
var factory = new MqttFactory();
mqttClient = factory.CreateMqttClient();
var options = new MqttClientOptionsBuilder()
.WithTcpServer(ip)
.WithCredentials(username, password)
.Build();
mainOptions = options;
await mqttClient.ConnectAsync(options, CancellationToken.None);
foreach (var t in topics)
{
await mqttClient.SubscribeAsync(new MqttTopicFilterBuilder().WithTopic(t).Build());
}
}
public void Reconnect(List <string> topics)
{
mqttClient.UseDisconnectedHandler(async e =>
{
await Task.Delay(TimeSpan.FromSeconds(5));
try
{
await mqttClient.ConnectAsync(mainOptions, CancellationToken.None);
if (mqttClient.IsConnected)
{
foreach (var t in topics)
{
await mqttClient.SubscribeAsync(new MqttTopicFilterBuilder().WithTopic(t).Build());
}
}
}
catch
{
}
});
}
private void ConnectButton_Click(object sender, RoutedEventArgs e)
{
if (mqttClient.IsConnected)
{
Task.Run(async() =>
{
try
{
await mqttClient.DisconnectAsync();
}
catch { }
});
}
else
{
MqttIsConnected = true;
var temp = new MqttClientOptionsBuilder()
.WithClientId(Tools.Global.setting.mqttClientID)
.WithTcpServer(Tools.Global.setting.mqttServer, Tools.Global.setting.mqttPort)
.WithCredentials(Tools.Global.setting.mqttUser, Tools.Global.setting.mqttPassword)
.WithKeepAlivePeriod(new TimeSpan(0, 0, Tools.Global.setting.mqttKeepAlive));
if (Tools.Global.setting.mqttTLS)
{
temp.WithTls();
}
if (Tools.Global.setting.mqttCleanSession)
{
temp.WithCleanSession();
}
var options = temp.Build();
Task.Run(async() =>
{
try
{
await mqttClient.ConnectAsync(options, CancellationToken.None);
}
catch { }
});
}
}
public async Task ConnectToBrokerAsync(string nelloTopicId)
{
try
{
_nelloTopicId = nelloTopicId;
var options = new MqttClientOptionsBuilder()
.WithTcpServer(SERVER_ADDRESS, SERVER_PORT)
.Build();
_client.UseDisconnectedHandler(async e =>
{
try
{
await _client.ReconnectAsync();
}
catch (Exception ex)
{
_logger.LogError("UseDisconnectedHandler error:\n" + ex.ToString());
}
});
_client.UseConnectedHandler(async e =>
{
try
{
foreach (var topic in _mqttListeningTopics)
{
await SubscribeToTopicAsync(string.Format("{0}{1}/{2}", TOPIC_PREFIX, _nelloTopicId, topic));
}
}
catch (Exception ex)
{
_logger.LogError("UseDisconnectedHandler error:\n" + ex.ToString());
}
});
_client.UseApplicationMessageReceivedHandler(e =>
{
try
{
if (e.ApplicationMessage.Topic.StartsWith("/nello_one"))
{
var args = new MqttMessageEventArgs();
args.ClientId = e.ClientId;
args.Message = Encoding.UTF8.GetString(e.ApplicationMessage.Payload);
args.Topic = e.ApplicationMessage.Topic;
MqttMessageReceived?.Invoke(this, args);
}
}
catch (Exception ex)
{
_logger.LogError("UseDisconnectedHandler error:\n" + ex.ToString());
}
});
await _client.ConnectAsync(options);
}
catch (Exception ex)
{
_logger.LogError("ConnectToBrokerAsync error:\n" + ex.ToString());
}
}
public async Task <bool> ConnectAsync(string clientId, string host, int port, bool tls, string username, string password)
{
this.mqttState.AddMessage($"connecting to {host}");
var options = new MqttClientOptionsBuilder()
.WithClientId(clientId)
.WithTcpServer(host, port)
.WithCleanSession();
if (!string.IsNullOrEmpty(username))
{
options = options.WithCredentials(username, password);
}
if (tls)
{
options = options.WithTls();
}
client = new MqttFactory().CreateMqttClient();
var t = new TaskCompletionSource <Boolean>();
var ct = new CancellationTokenSource(5000); // timeout ms
ct.Token.Register(() => { if (!t.Task.IsCompleted)
{
t.SetResult(false);
}
}, useSynchronizationContext: false);
client.UseConnectedHandler(e => {
this.mqttState.AddMessage("Connected");
mqttState.SetConnected(true);
t.SetResult(true);
});
client.UseDisconnectedHandler(e => {
this.mqttState.AddMessage("Disconnected");
mqttState.SetConnected(false);
});
client.UseApplicationMessageReceivedHandler(e =>
{
var subscription = mqttState.Subscriptions.SingleOrDefault(s => s.Topic == e.ApplicationMessage.Topic);
if (subscription != null)
{
subscription.AddMessage(
new MqttSubscriptionMessage(
e.ApplicationMessage.Topic,
Encoding.Default.GetString(e.ApplicationMessage.Payload),
DateTime.Now)
);
}
});
try
{
var result = await client.ConnectAsync(options.Build(), CancellationToken.None);
if (result.ResultCode != MQTTnet.Client.Connecting.MqttClientConnectResultCode.Success)
{
this.mqttState.AddMessage("Error: " + result.ReasonString);
}
}
catch (Exception e)
{
Console.Error.WriteLine(e.Message + " : " + e.StackTrace);
t.SetResult(false);
}
return(await t.Task);
}