Initial commit: MQTT publisher with rumqttc

src/main.rs

@@ -0,0 +1,35 @@
+use rumqttc::{AsyncClient, Event, MqttOptions, Packet, QoS};
+use std::time::Duration;
+use tokio::time::sleep;
+
+#[tokio::main]
+async fn main() -> Result<(), Box<dyn std::error::Error>> {
+    let mut mqttoptions = MqttOptions::new(
+        "mqtt-publisher",
+        "localhost",
+        1883,
+    );
+    mqttoptions.set_keep_alive(Duration::from_secs(30));
+
+    let (client, mut eventloop) = AsyncClient::new(mqttoptions, 100);
+
+    client
+        .publish("test/topic", QoS::AtLeastOnce, false, b"Hello from Rust MQTT!")
+        .await?;
+
+    println!("Published message to test/topic");
+
+    loop {
+        match eventloop.poll().await {
+            Ok(Event::Incoming(Packet::Publish(_))) => {}
+            Ok(Event::Incoming(Packet::ConnAck(_))) => {
+                println!("Connected to MQTT broker");
+            }
+            Ok(_) => {}
+            Err(e) => {
+                println!("Error: {:?}", e);
+                sleep(Duration::from_secs(1)).await;
+            }
+        }
+    }
+}