public static async Task <IMqttClient> GetConnectedClientAsync()
{
if (Client == null)
{
Client = new MqttFactory().CreateMqttClient();
Client.ConnectedHandler = new MqttClientConnectedHandlerDelegate(e => { });
Client.DisconnectedHandler = new MqttClientDisconnectedHandlerDelegate(e => { });
Client.ApplicationMessageReceivedHandler = new MqttApplicationMessageReceivedHandlerDelegate(e =>
{
Console.WriteLine(MqttUtils.ToString("client", e.ApplicationMessage));
});
}
if (!Client.IsConnected)
{
var options = new MqttClientOptionsBuilder()
.WithTcpServer("127.0.0.1", 61613)
.WithCredentials("admin", "password")
.Build();
var authenticateResult = await Client.ConnectAsync(options, CancellationToken.None);
if (authenticateResult.ResultCode != MqttClientConnectResultCode.Success)
{
throw new Exception($"Auth failed. Status={authenticateResult.ResultCode}");
}
}
return(Client);
}
/// <summary>
/// Builds a payload based on the device tag data to publish.
/// </summary>
public string BuildPayload(DeviceTag deviceTag, CnlData[] cnlData, int dataIndex)
{
int dataLength = deviceTag.DataLength;
int stat = CnlDataConverter.GetStatus(cnlData, dataIndex, dataLength);
bool formatIsEmpty = string.IsNullOrEmpty(dsOptions.PublishOptions.PublishFormat);
if (formatIsEmpty && stat <= CnlStatusID.Undefined)
{
return(dsOptions.PublishOptions.UndefinedValue);
}
string valStr = "";
switch (deviceTag.DataType)
{
case TagDataType.Double:
valStr = deviceTag.IsNumericArray
? ArrayToString(CnlDataConverter.GetDoubleArray(cnlData, dataIndex, dataLength))
: CnlDataConverter.GetDouble(cnlData, dataIndex).ToString(NumberFormatInfo.InvariantInfo);
break;
case TagDataType.Int64:
valStr = deviceTag.IsNumericArray
? ArrayToString(CnlDataConverter.GetInt64Array(cnlData, dataIndex, dataLength))
: CnlDataConverter.GetInt64(cnlData, dataIndex).ToString(NumberFormatInfo.InvariantInfo);
break;
case TagDataType.ASCII:
valStr = CnlDataConverter.GetAscii(cnlData, dataIndex, dataLength);
break;
case TagDataType.Unicode:
valStr = CnlDataConverter.GetUnicode(cnlData, dataIndex, dataLength);
break;
}
return(formatIsEmpty
? valStr
: MqttUtils.FormatPayload(dsOptions.PublishOptions.PublishFormat, valStr, stat));
}
public static void Run() => MqttUtils.Subscribe(MqttConstantes.TOPICO_SUBSCRIBERS, EventHandler);
