final

final/Cargo.lock

@@ -326,7 +326,7 @@ dependencies = [
  "embassy-time 0.5.0",
  "embedded-io-async",
  "embedded-nal-async",
- "heapless 0.8.0",
+ "heapless",
  "log",
  "managed",
  "smoltcp",
@@ -349,7 +349,7 @@ dependencies = [
  "embedded-io-async",
  "futures-sink",
  "futures-util",
- "heapless 0.8.0",
+ "heapless",
 ]
 
 [[package]]
@@ -363,7 +363,7 @@ dependencies = [
  "embedded-io-async",
  "futures-core",
  "futures-sink",
- "heapless 0.8.0",
+ "heapless",
 ]
 
 [[package]]
@@ -415,7 +415,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "dc55c748d16908a65b166d09ce976575fb8852cf60ccd06174092b41064d8f83"
 dependencies = [
  "embassy-executor",
- "heapless 0.8.0",
+ "heapless",
 ]
 
 [[package]]
@@ -551,7 +551,7 @@ dependencies = [
  "cfg-if",
  "esp-config",
  "esp-println",
- "heapless 0.8.0",
+ "heapless",
  "semihosting",
 ]
 
@@ -932,16 +932,6 @@ dependencies = [
  "stable_deref_trait",
 ]
 
-[[package]]
-name = "heapless"
-version = "0.9.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b1edcd5a338e64688fbdcb7531a846cfd3476a54784dcb918a0844682bc7ada5"
-dependencies = [
- "hash32",
- "stable_deref_trait",
-]
-
 [[package]]
 name = "heck"
 version = "0.5.0"
@@ -1254,7 +1244,7 @@ dependencies = [
  "defmt 0.3.100",
  "embedded-io",
  "embedded-io-async",
- "heapless 0.8.0",
+ "heapless",
  "rand_core 0.6.4",
 ]
 
@@ -1322,7 +1312,7 @@ dependencies = [
  "bitflags 1.3.2",
  "byteorder",
  "cfg-if",
- "heapless 0.8.0",
+ "heapless",
  "log",
  "managed",
 ]
@@ -1407,7 +1397,6 @@ dependencies = [
  "esp-hal-embassy",
  "esp-println",
  "esp-wifi",
- "heapless 0.9.1",
  "log",
  "rust-mqtt",
  "smoltcp",

final/Cargo.toml

@@ -65,7 +65,6 @@ smoltcp = { version = "0.12.0", default-features = false, features = [
 ] }
 static_cell = "2.1.1"
 rust-mqtt = { version = "0.3.0", default-features = false, features = ["no_std"] }
-heapless = "0.9.1"
 
 [build-dependencies]
 dotenvy = "0.15.7"

final/src/bin/main.rs

@@ -17,6 +17,7 @@ use esp_wifi::{
     wifi::{ClientConfiguration, Configuration, WifiController, WifiDevice, WifiEvent, WifiState},
 };
 use log::info;
+mod mqtt;
 
 extern crate alloc;
 

final/src/mqtt/client.rs

@@ -0,0 +1,53 @@
+use embassy_time::{Duration, Timer};
+use embassy_net::{tcp::TcpSocket, Stack};
+use esp_wifi::wifi::WifiDevice;
+use rust_mqtt::client::client::MqttClient;
+use rust_mqtt::packet::v5::{connect::ConnectPacket, publish::PublishPacket};
+use rust_mqtt::utils::rng_generator::CountingRng32;
+use log::info;
+
+#[embassy_executor::task]
+pub async fn mqtt_task(stack: &'static Stack<WifiDevice<'static>>) {
+    info!("MQTT task starting...");
+
+    static mut RX_BUFFER: [u8; 2048] = [0; 2048];
+    static mut TX_BUFFER: [u8; 2048] = [0; 2048];
+
+    let mut socket = TcpSocket::new(stack, unsafe { &mut RX_BUFFER }, unsafe { &mut TX_BUFFER });
+
+    // TODO: replace with your broker IP
+    use embassy_net::Ipv4Address;
+    let broker_ip = Ipv4Address::new(192, 168, 1, 100);
+    let broker_port = 1883;
+
+    if let Err(e) = socket.connect((broker_ip, broker_port)).await {
+        info!("TCP connect failed: {:?}", e);
+        return;
+    }
+    info!("Connected to MQTT broker");
+
+    let rng = CountingRng32::new();
+    let mut client: MqttClient<_, _, 1024, 1024> = MqttClient::new(socket, rng);
+
+    let connect = ConnectPacket::new("esp32-client");
+    if client.connect(connect).await.is_ok() {
+        info!("MQTT CONNECT sent");
+    }
+
+    let publish = PublishPacket::new("esp32/topic", b"hello from esp32", 0);
+    if client.publish(publish).await.is_ok() {
+        info!("MQTT PUBLISH sent");
+    }
+
+    // Keep polling
+    loop {
+        match client.poll().await {
+            Ok(_) => {}
+            Err(e) => {
+                info!("MQTT error: {:?}", e);
+                break;
+            }
+        }
+        Timer::after(Duration::from_secs(5)).await;
+    }
+}

final/src/mqtt/mod.rs

@@ -0,0 +1,2 @@
+
+pub mod client;