public async Task <IMqttClient> RegisterDevice(ICumulocityDevice device)
{
IConnectionDetails cDetails = new ConnectionDetailsBuilder()
.WithClientId(device.ClientId)
.WithHost(_baseUrlPath)
.WithCredentials(BootstrapUser, Password)
.WithCleanSession()
.WithProtocol(TransportType.Tcp)
.WithCleanSession()
.Build();
var client = new MqttClient(cDetails);
await client.EstablishConnectionAsync();
await client.SubscribeAsync(new MqttMessageRequest()
{
TopicName = "s/dcr"
});
client.MessageReceived += (sender, response) =>
{
Console.WriteLine(response.MessageContent);
};
// var res = await _httpClient.PostAsync("/s/ucr", new StringContent(""));
await client.PublishAsync(new MqttMessageRequestBuilder()
.WithTopicName("s/ucr")
.WithQoS(QoS.EXACTLY_ONCE)
.WithMessageContent(string.Empty)
.Build());
return(null);
}
private IConnectionDetails CreateConnectionDetails(ICumulocityDevice device)
{
IConnectionDetails connectionDetails = new ConnectionDetailsBuilder()
.WithClientId(device.ClientId)
.WithHost(_cumulocityInfo.ServerUrl)
.WithCredentials(device.User, device.Password)
.WithCleanSession()
.WithProtocol(TransportType.Tcp)
.Build();
return(connectionDetails);
}
private static async Task RunJsonViaMqttClientAsync(CancellationToken cToken)
{
const string serverUrl = "mqtt.cumulocity.com";
const string clientId = "my_mqtt_cs_client";
const string device_name = "My C# MQTT device";
const string user = "******";
const string password = "******";
// connections details
var cDetails = new ConnectionDetailsBuilder()
.WithClientId(clientId)
.WithHost(serverUrl)
.WithCredentials(user, password)
.WithCleanSession(true)
.WithProtocol(TransportType.Tcp)
.Build();
MqttClient client = new MqttClient(cDetails);
client.MessageReceived += Client_MessageReceived;
client.Connected += Client_Connected;
client.ConnectionFailed += Client_ConnectionFailed;
await client.EstablishConnectionAsync();
string topic = "s/us";
string payload = $"100,{device_name}, c8y_MQTTDevice";
var message = new MqttMessageRequestBuilder()
.WithTopicName(topic)
.WithQoS(QoS.EXACTLY_ONCE)
.WithMessageContent(payload)
.Build();
await client.PublishAsync(message);
// set device's hardware information
var deviceMessage = new MqttMessageRequestBuilder()
.WithTopicName("s/us")
.WithQoS(QoS.EXACTLY_ONCE)
.WithMessageContent("110, S123456789, MQTT test model, Rev0.1")
.Build();
await client.PublishAsync(deviceMessage);
// add restart operation
await client.SubscribeAsync(new MqttMessageRequest()
{
TopicName = "s/ds"
});
await client.SubscribeAsync(new MqttMessageRequest()
{
TopicName = "s/e"
});
await client.PublishAsync(new MqttMessageRequestBuilder()
.WithTopicName("s/us")
.WithQoS(QoS.EXACTLY_ONCE)
.WithMessageContent("114,c8y_Restart")
.Build());
// generate a random temperature (10º-20º) measurement and send it every second
Random rnd = new Random();
while (!cToken.IsCancellationRequested)
{
int temp = rnd.Next(10, 20);
Console.WriteLine("Sending temperature measurement (" + temp + "º) ...");
await client.PublishAsync(new MqttMessageRequestBuilder()
.WithTopicName("s/us")
.WithQoS(QoS.EXACTLY_ONCE)
.WithMessageContent("211," + temp)
.Build());
Thread.Sleep(1000);
}
}
