Make QOS and retain part of the publish API, add raw client, fix clippy warnings, update e-io version (#25)

examples/pubsub.rs

@@ -0,0 +1,60 @@
+use std::{
+    net::{Ipv4Addr, SocketAddr},
+    time::Duration,
+};
+
+use embedded_io::adapters::FromTokio;
+use rust_mqtt::{
+    client::{client::MqttClient, client_config::ClientConfig},
+    packet::v5::reason_codes::ReasonCode,
+    utils::rng_generator::CountingRng,
+};
+use tokio::net::TcpStream;
+
+#[tokio::main]
+async fn main() {
+    env_logger::init();
+
+    let addr = SocketAddr::new(Ipv4Addr::new(127, 0, 0, 1).into(), 1883);
+
+    let connection = TcpStream::connect(addr)
+        .await
+        .map_err(|_| ReasonCode::NetworkError)
+        .unwrap();
+    let connection = FromTokio::<TcpStream>::new(connection);
+    let mut config = ClientConfig::new(
+        rust_mqtt::client::client_config::MqttVersion::MQTTv5,
+        CountingRng(20000),
+    );
+    config.add_max_subscribe_qos(rust_mqtt::packet::v5::publish_packet::QualityOfService::QoS1);
+    config.add_client_id("client");
+    // config.add_username(USERNAME);
+    // config.add_password(PASSWORD);
+    config.max_packet_size = 100;
+    let mut recv_buffer = [0; 80];
+    let mut write_buffer = [0; 80];
+
+    let mut client = MqttClient::<_, 5, _>::new(
+        connection,
+        &mut write_buffer,
+        80,
+        &mut recv_buffer,
+        80,
+        config,
+    );
+
+    client.connect_to_broker().await.unwrap();
+
+    loop {
+        client
+            .send_message(
+                "hello",
+                b"hello2",
+                rust_mqtt::packet::v5::publish_packet::QualityOfService::QoS0,
+                true,
+            )
+            .await
+            .unwrap();
+        tokio::time::sleep(Duration::from_millis(500)).await;
+    }
+}