/// <summary>
/// Publish a message to the specified topic.
/// </summary>
/// <param name="topic">Topic name.</param>
/// <param name="message">Message text.</param>
public MqttClientHelper Publish(string topic, string message)
{
lock (mqttSyncLock)
{
mqttClient.PublishMessage <string, AsciiPayloadConverter>(topic, (MqttQos)1, message);
}
return(this);
}
/// <summary>
/// Publish message to the specified topic.
/// </summary>
/// <param name="topic">The topic.</param>
/// <param name="qos">The qos.</param>
/// <param name="data">The message.</param>
public void Publish(string topic, byte qos, string data)
{
if (client == null)
{
throw new InvalidOperationException("You must connect before you can subscribe to a topic.");
}
client.PublishMessage <string, AsciiPayloadConverter>(topic, (MqttQos)qos, data);
}
static void SenseHatEnvironmentMqtt()
{
var clientId = "StrubT";
var centerGuid = "F386-09CA-1F9F-9A1F-BAD3-F573-64A0-2A22";
var combinedGuid = "B156D76BA28A425FB1626D1D9207BB4C";
var temperatureGuid = "31B0E939B27C45229CB75A06B1E47919";
var humidityGuid = "EB5E6260F83E4118A919C226CAC1E82B";
var pressureGuid = "CF8EB59A961B4C58A075A822485708FB";
var topicNames = new Dictionary <string, string> {
[combinedGuid] = "Environment",
[temperatureGuid] = "Temperature (°C)",
[humidityGuid] = "Humidity (% rel)",
[pressureGuid] = "Pressure (mbar)"
};
var combinedTopic = $"siot/DAT/{centerGuid}/{combinedGuid}";
//var combinedTopicTrigger = $"siot/TRG/{centerGuid}/{combinedGuid}";
//var combinedTopicCommand = $"siot/CMD/{centerGuid}/{combinedGuid}";
//var combinedTopicStatus = $"siot/STA/{centerGuid}/{combinedGuid}";
var temperatureTopic = $"siot/DAT/{centerGuid}/{temperatureGuid}";
var humidityTopic = $"siot/DAT/{centerGuid}/{humidityGuid}";
var pressureTopic = $"siot/DAT/{centerGuid}/{pressureGuid}";
using (var client = new MqttClient("siot.net", clientId)) {
client.MessageAvailable += (sender, e) => Console.WriteLine($"{topicNames[e.Topic.Split('/').Last()],-20}: {e.Message:#,##0.00}");
client.Connect();
client.Subscribe <SenseHatEnvironment.MqttConverter>(combinedTopic, MqttQos.AtLeastOnce);
client.Subscribe <Mqtt.DoubleConverter>(temperatureTopic, MqttQos.AtLeastOnce);
client.Subscribe <Mqtt.DoubleConverter>(humidityTopic, MqttQos.AtLeastOnce);
client.Subscribe <Mqtt.DoubleConverter>(pressureTopic, MqttQos.AtLeastOnce);
Console.ReadLine();
var r = new Random();
for (var i = 0; i < 5; i++)
{
var data = new SenseHatEnvironment {
Temperature = r.NextDouble() * 20 + 20, Humidity = r.NextDouble() * 20 + 20, Pressure = 1000 + (r.NextDouble() - 0.5) * 100
};
client.PublishMessage <SenseHatEnvironment.MqttConverter>(combinedTopic, data);
client.PublishMessage <Mqtt.DoubleConverter>(temperatureTopic, data.Temperature);
client.PublishMessage <Mqtt.DoubleConverter>(humidityTopic, data.Humidity);
client.PublishMessage <Mqtt.DoubleConverter>(pressureTopic, data.Pressure);
}
Thread.Sleep(250);
}
}
private void button3_Click(object sender, EventArgs e)
{
OperateResult send = mqttClient.PublishMessage(new MqttApplicationMessage( )
{
QualityOfServiceLevel = MqttQualityOfServiceLevel.AtMostOnce,
Topic = textBox5.Text,
Payload = Encoding.UTF8.GetBytes(textBox4.Text)
});
if (!send.IsSuccess)
{
MessageBox.Show("Send Failed:" + send.Message);
}
}
private void button3_Click(object sender, EventArgs e)
{
// 最多一次
OperateResult send = mqttClient.PublishMessage(new MqttApplicationMessage( )
{
QualityOfServiceLevel = MqttQualityOfServiceLevel.AtMostOnce,
Topic = textBox5.Text,
Payload = Encoding.UTF8.GetBytes(textBox4.Text),
Retain = checkBox1.Checked // 如果为TRUE，该消息在服务器上进行驻留保存，方便客户端连上立即推送
});
if (!send.IsSuccess)
{
MessageBox.Show("Send Failed:" + send.Message);
}
}
private static void HNur_InventoryStreamEvent(object sender, NurApi.InventoryStreamEventArgs e)
{
try
{
if (e.data.tagsAdded > 0)
{
NurApi.TagStorage tags = hNur.GetTagStorage();
foreach (NurApi.Tag tag in tags)
{
//have we seen this tag yet?
if (!inventoryResults.Contains(tag.GetEpcString()))
{
inventoryResults.Add(tag.GetEpcString());
if (client != null)
{
client.PublishMessage("nurapisample/epc", System.Text.Encoding.ASCII.GetBytes(tag.GetEpcString()));
}
}
}
}
//if streaming stopped, restart it
if (e.data.stopped)
{
hNur.StartInventoryStream();
}
}
catch (Exception ex)
{
Console.WriteLine("Something went wrong during inventory stream event [" + ex.Message + "]");
}
}
static void SenseHatImages8x8()
{
var clientId = "StrubT";
var centerGuid = "F386-09CA-1F9F-9A1F-BAD3-F573-64A0-2A22";
var messageGuid = "14760cc8-4cea-c63c-a825-cef162c16146";
var messageTopic = $"siot/DAT/{centerGuid}/{messageGuid}";
var rng = Enumerable.Range(0, 8).ToList();
using (var client = new MqttClient("siot.net", clientId)) {
client.Connect();
foreach (var img in new[] { Properties.Resources.linkedin, Properties.Resources.twitter, Properties.Resources.facebook })
{
using (img) {
var msg = rng.SelectMany(x => rng.SelectMany(y => {
var pxl = img.GetPixel(x, y);
return(new[] { x, y, pxl.R, pxl.G, pxl.B });
})).ToList();
client.PublishMessage <Mqtt.StringConverter>(messageTopic, string.Join(",", msg));
Thread.Sleep(1500);
}
}
}
}
static void SenseHatMessage()
{
var clientId = "StrubT";
var centerGuid = "F386-09CA-1F9F-9A1F-BAD3-F573-64A0-2A22";
var messageGuid = "14760cc8-4cea-c63c-a825-cef162c16146";
var messageTopic = $"siot/DAT/{centerGuid}/{messageGuid}";
Console.Write("Enter message: ");
var msg = Console.ReadLine();
using (var client = new MqttClient("siot.net", clientId)) {
client.Connect();
client.PublishMessage <Mqtt.StringConverter>(messageTopic, msg);
}
}
public bool SendMessage(string Topic, string Payload)
{
try
{
client.PublishMessage(new MqttApplicationMessage()
{
Topic = Topic,
QualityOfServiceLevel = MqttQualityOfServiceLevel.AtLeastOnce,
Payload = Encoding.UTF8.GetBytes(Payload),
Retain = false
});
return(true);
}
catch
{
return(false);
}
}
static void SenseHatImageSet()
{
var clientId = "StrubT";
var centerGuid = "F386-09CA-1F9F-9A1F-BAD3-F573-64A0-2A22";
var messageGuid = "14760cc8-4cea-c63c-a825-cef162c16146";
var messageTopic = $"siot/DAT/{centerGuid}/{messageGuid}";
var rng = Enumerable.Range(0, 8).ToList();
var borderX = 14;
var borderY = 12;
var margin = 10;
var size = 8;
using (var img = Properties.Resources.set)
using (var client = new MqttClient("siot.net", clientId)) {
client.Connect();
for (var Y = 0; Y < 16; Y++)
{
for (var X = 0; X < 21; X++)
{
Console.Write($"{X}x{Y} \r");
var msg = rng.SelectMany(x => rng.SelectMany(y => {
var pxl = img.GetPixel(borderX + X * (size + margin) + x, borderY + Y * (size + margin) + y);
return(new[] { x, y, pxl.R, pxl.G, pxl.B });
})).ToList();
client.PublishMessage <Mqtt.StringConverter>(messageTopic, string.Join(",", msg));
Thread.Sleep(250);
}
}
}
Console.WriteLine();
}
static void SenseHatLedArray()
{
var clientId = "StrubT";
var centerGuid = "F386-09CA-1F9F-9A1F-BAD3-F573-64A0-2A22";
var messageGuid = "14760cc8-4cea-c63c-a825-cef162c16146";
var messageTopic = $"siot/DAT/{centerGuid}/{messageGuid}";
var leds = new Color[8, 8];
leds[0, 0] = Color.Red;
leds[2, 7] = Color.BlueViolet;
leds[5, 5] = Color.Navy;
leds[4, 3] = Color.PeachPuff;
var rng = Enumerable.Range(0, 8).ToList();
using (var client = new MqttClient("siot.net", clientId)) {
client.Connect();
var msg = rng.SelectMany(x => rng.SelectMany(y => new[] { x, y, leds[x, y].R, leds[x, y].G, leds[x, y].B })).ToList();
client.PublishMessage <Mqtt.StringConverter>(messageTopic, string.Join(",", msg));
}
}
/// <summary>
/// Publishes a message to the MQTT message broker
/// </summary>
/// <param name="topic">The topic to publish the message to.</param>
/// <param name="message">The message to publish.</param>
/// <returns>The message identifier assigned to the message.</returns>
private short PublishMessage(string topic, string message)
{
byte[] messageData = Encoding.ASCII.GetBytes(message);
return(Client.PublishMessage(topic, messageData));
}
