working mqtt with protobuf

flake.nix

@@ -20,7 +20,12 @@
           rustfmt
           pkg-config
           openssl
-	  mosquitto
+          # MQTT
+      	  mosquitto
+      	  # protobuf
+          protobuf
+          protoc-gen-doc
+    	    buf
         ];
 
         shellHook = ''

protos/.gitignore

@@ -0,0 +1 @@
+target/

protos/Cargo.toml

@@ -0,0 +1,13 @@
+[package]
+name = "protos"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
+heapless = "0.9.2"
+micropb = { version = "0.6.0", default-features = false, features = ["container-heapless-0-9", "decode", "encode"] }
+rumqttc = "0.25.1"
+# micropb = { version = "0.6.0", default-features = false, features = ["container-heapless-0-9"] }
+
+[build-dependencies]
+micropb-gen = "0.6.0"

protos/build.rs

@@ -0,0 +1,16 @@
+// build.rs
+
+use micropb_gen::Generator;
+
+fn main() {
+    let mut generator = Generator::new();
+
+    generator.use_container_heapless();
+
+    generator
+        .compile_protos(
+            &["transport.proto"],
+            std::env::var("OUT_DIR").unwrap() + "/nieco.rs",
+        )
+        .unwrap();
+}

protos/src/main.rs

@@ -0,0 +1,79 @@
+// src/main.rs
+
+use micropb::MessageEncode;
+use micropb::PbEncoder;
+use micropb::{DecodeError, MessageDecode, PbDecoder, PbRead};
+use rumqttc::{Client, MqttOptions, QoS};
+use std::thread;
+use std::time::{Duration, Instant};
+
+mod transport {
+    #![allow(clippy::all)]
+    #![allow(nonstandard_style, dead_code, unused_imports, unused_parens)]
+    include!(concat!(env!("OUT_DIR"), "/nieco.rs"));
+}
+
+use crate::transport::ahoj_::Example;
+
+fn main() {
+    // let mut mqttoptions = MqttOptions::new("client-123", "mqtt.farmeris.sk", 1883);
+    let client_id = format!("client-{}", Instant::now().elapsed().as_micros());
+    let mut mqttoptions = MqttOptions::new(client_id, "185.55.240.128", 1883);
+    mqttoptions.set_keep_alive(Duration::from_secs(5));
+
+    let (mut client, mut connection) = Client::new(mqttoptions, 10);
+
+    thread::spawn(move || {
+        for notification in connection.iter() {
+            match notification {
+                Ok(rumqttc::Event::Incoming(rumqttc::Packet::Publish(p))) => {
+                    let mut decoder = PbDecoder::new(p.payload.as_ref());
+                    let mut message = Example::default();
+                    if let Ok(_) = message.decode(&mut decoder, p.payload.len()) {
+                        println!("{:?}", message);
+                    }
+                }
+                Ok(event) => println!("Other Event: {:?}", event),
+                Err(e) => {
+                    eprintln!("MQTT Connection notice: {:?}", e);
+                    thread::sleep(Duration::from_secs(1));
+                }
+            }
+        }
+    });
+
+    client.subscribe("test/topic", QoS::AtMostOnce).unwrap();
+
+    let mut last_pub = Instant::now();
+    let mut i = 0;
+
+    loop {
+        if i < 10 && last_pub.elapsed() >= Duration::from_millis(500) {
+            let msg = Example {
+                f_int32: i,
+                f_bool: true,
+                f_fixed32: (i * 10) as u32,
+                f_sfixed32: i * 10,
+                ..Default::default()
+            };
+
+            let mut output = heapless::Vec::<u8, 30>::new();
+            let mut encoder = PbEncoder::new(&mut output);
+            // msg.encode(&mut encoder).unwrap();
+
+            if msg.encode(&mut encoder).is_ok() {
+                println!("Odosielam Protobuf správu {}", i);
+                if let Err(e) =
+                    client.publish("test/topic", QoS::AtLeastOnce, false, output.to_vec())
+                {
+                    eprintln!("Chyba pri publikovaní: {:?}", e);
+                }
+            }
+
+            i += 1;
+            last_pub = Instant::now();
+        }
+
+        std::thread::sleep(Duration::from_millis(10));
+    }
+}

protos/transport.proto

@@ -0,0 +1,12 @@
+syntax = "proto3";
+
+package ahoj;
+
+message Example {
+    int32 f_int32 = 1;
+    uint32 f_uint32 = 3;
+    sint32 f_sint32 = 5;
+    bool f_bool = 7;
+    fixed32 f_fixed32 = 8;
+    sfixed32 f_sfixed32 = 10;
+}

semestralka/.cargo/config.toml

@@ -0,0 +1,17 @@
+[target.xtensa-esp32-none-elf]
+runner = "espflash flash --monitor --chip esp32"
+
+[env]
+ESP_LOG="info"
+
+[build]
+rustflags = [
+  "-C", "link-arg=-nostartfiles",
+  "-C", "link-arg=-Tdefmt.x",
+  "-Z", "stack-protector=all",
+]
+
+target = "xtensa-esp32-none-elf"
+
+[unstable]
+build-std = ["alloc", "core"]

semestralka/.gitignore

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semestralka/Cargo.toml

@@ -0,0 +1,7 @@
+[package]
+name = "semestralka"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
+esp-hal = "1.0.0"

semestralka/build.rs

@@ -0,0 +1,79 @@
+fn main() {
+    // Explicitly load .env from the project root, even when called from other dirs
+    let project_root = std::env::var("CARGO_MANIFEST_DIR").unwrap();
+    let dotenv_path = std::path::Path::new(&project_root).join(".env");
+    if dotenvy::from_path(dotenv_path.clone()).is_ok() {
+        println!("cargo:rerun-if-changed={}", dotenv_path.display());
+    }
+
+    // Pass WIFI credentials into firmware
+    if let Ok(ssid) = std::env::var("SSID") {
+        println!("cargo:rustc-env=SSID={}", ssid);
+    }
+    if let Ok(password) = std::env::var("PASSWORD") {
+        println!("cargo:rustc-env=PASSWORD={}", password);
+    }
+    if let Ok(ip) = std::env::var("BROKER_IP") {
+        println!("cargo:rustc-env=BROKER_IP={}", ip);
+    }
+    if let Ok(port) = std::env::var("BROKER_PORT") {
+        println!("cargo:rustc-env=BROKER_PORT={}", port);
+    }
+
+    linker_be_nice();
+
+    println!("cargo:rustc-link-arg=-Tlinkall.x");
+}
+
+fn linker_be_nice() {
+    let args: Vec<String> = std::env::args().collect();
+    if args.len() > 1 {
+        let kind = &args[1];
+        let what = &args[2];
+
+        match kind.as_str() {
+            "undefined-symbol" => match what.as_str() {
+                "_defmt_timestamp" => {
+                    eprintln!();
+                    eprintln!(
+                        "💡 `defmt` not found - make sure `defmt.x` is added as a linker script and you have included `use defmt_rtt as _;`"
+                    );
+                    eprintln!();
+                }
+                "_stack_start" => {
+                    eprintln!();
+                    eprintln!("💡 Is the linker script `linkall.x` missing?");
+                    eprintln!();
+                }
+                "esp_wifi_preempt_enable"
+                | "esp_wifi_preempt_yield_task"
+                | "esp_wifi_preempt_task_create" => {
+                    eprintln!();
+                    eprintln!(
+                        "💡 `esp-wifi` has no scheduler enabled. Make sure you have the `builtin-scheduler` feature enabled, or that you provide an external scheduler."
+                    );
+                    eprintln!();
+                }
+                "embedded_test_linker_file_not_added_to_rustflags" => {
+                    eprintln!();
+                    eprintln!(
+                        "💡 `embedded-test` not found - make sure `embedded-test.x` is added as a linker script for tests"
+                    );
+                    eprintln!();
+                }
+                _ => (),
+            },
+            // we don't have anything helpful for "missing-lib" yet
+            _ => {
+                std::process::exit(1);
+            }
+        }
+
+        std::process::exit(0);
+    }
+
+    println!(
+        "cargo:rustc-link-arg=-Wl,--error-handling-script={}",
+        std::env::current_exe().unwrap().display()
+    );
+}

semestralka/src/main.rs

@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, world!");
+}