/// <summary>
/// Attempt to connect and subscribe to the MQTT broker.
/// </summary>
/// <param name="entities"></param>
public async Task Connect()
{
if (string.IsNullOrEmpty(SettingsControl.MqttUsername))
{
throw new ArgumentNullException(nameof(SettingsControl.MqttUsername));
}
if (string.IsNullOrEmpty(SettingsControl.MqttPassword))
{
throw new ArgumentNullException(nameof(SettingsControl.MqttPassword));
}
if (string.IsNullOrEmpty(SettingsControl.MqttBrokerHostname))
{
throw new ArgumentNullException(nameof(SettingsControl.MqttBrokerHostname));
}
// Create TCP-based connection options
IMqttClientOptions mqttClientOptions = new MqttClientOptionsBuilder()
.WithTcpServer(SettingsControl.MqttBrokerHostname)
.WithCredentials(SettingsControl.MqttUsername, SettingsControl.MqttPassword)
.WithCleanSession()
.Build();
await WebRequests.WaitForNetworkAvailable();
// If we disconnect for any reason, attempt to reconnect
AttemptReconnectOnDisconnect = true;
while (!MqttClient.IsConnected)
{
try
{
await MqttClient.ConnectAsync(mqttClientOptions);
}
catch (Exception e)
{
Telemetry.TrackException(nameof(Connect), e);
await Task.Delay(TimeSpan.FromSeconds(1));
}
}
}
