implement async mqtt config update trigger and fix mqtt.rs corruption

- use crate::util::mk_static in network module
- use crate::util::mk_static in mqtt module
- use crate::util::mk_static in hal module
- remove dead mk_static macro from esp module

rust/src/hal/esp.rs

@@ -17,12 +17,9 @@ use core::net::{IpAddr, Ipv4Addr, SocketAddr};
 use core::str::FromStr;
 use core::sync::atomic::Ordering;
 use embassy_executor::Spawner;
-use embassy_net::dns::DnsQueryType;
-use embassy_net::udp::{PacketMetadata, UdpSocket};
 use embassy_net::{DhcpConfig, IpAddress, Ipv4Cidr, Runner, Stack, StackResources, StaticConfigV4};
 use embassy_sync::blocking_mutex::raw::CriticalSectionRawMutex;
 use embassy_sync::mutex::{Mutex, MutexGuard};
-use embassy_sync::once_lock::OnceLock;
 use embassy_time::{Duration, Timer, WithTimeout};
 use embedded_storage::nor_flash::{check_erase, NorFlash, ReadNorFlash, RmwNorFlashStorage};
 use esp_bootloader_esp_idf::ota::OtaImageState::Valid;
@@ -44,14 +41,10 @@ use esp_storage::FlashStorage;
 use littlefs2::fs::Filesystem;
 use littlefs2_core::{FileType, PathBuf, SeekFrom};
 use log::{info, warn, error};
-use mcutie::{
-    Error, McutieBuilder, McutieReceiver, McutieTask, MqttMessage, PublishDisplay, Publishable,
-    QoS, Topic,
-};
 use portable_atomic::AtomicBool;
-use sntpc::{NtpContext, NtpTimestampGenerator, NtpUdpSocket, get_time};
 
 use super::shared_flash::MutexFlashStorage;
+use crate::network::{net_task, run_dhcp};
 
 #[esp_hal::ram(unstable(rtc_fast), unstable(persistent))]
 static mut LAST_WATERING_TIMESTAMP: [i64; PLANT_COUNT] = [0; PLANT_COUNT];
@@ -66,12 +59,6 @@ static mut LAST_CORROSION_PROTECTION_CHECK_DAY: i8 = -1;
 
 
 const CONFIG_FILE: &str = "config.json";
-const NTP_SERVER: &str = "pool.ntp.org";
-
-static MQTT_CONNECTED_EVENT_RECEIVED: AtomicBool = AtomicBool::new(false);
-static MQTT_ROUND_TRIP_RECEIVED: AtomicBool = AtomicBool::new(false);
-pub static MQTT_STAY_ALIVE: AtomicBool = AtomicBool::new(false);
-static MQTT_BASE_TOPIC: OnceLock<String> = OnceLock::new();
 
 #[derive(Serialize, Debug)]
 pub struct FileInfo {
@@ -86,11 +73,6 @@ pub struct FileList {
     files: Vec<FileInfo>,
 }
 
-#[derive(Copy, Clone, Default)]
-struct Timestamp {
-    stamp: DateTime<Utc>,
-}
-
 // Minimal esp-idf equivalent for gpio_hold on esp32c6 via ROM functions
 extern "C" {
     fn gpio_pad_hold(gpio_num: u32);
@@ -107,53 +89,6 @@ pub fn hold_disable(gpio_num: u8) {
     unsafe { gpio_pad_unhold(gpio_num as u32) }
 }
 
-impl NtpTimestampGenerator for Timestamp {
-    fn init(&mut self) {
-        self.stamp = DateTime::default();
-    }
-
-    fn timestamp_sec(&self) -> u64 {
-        self.stamp.timestamp() as u64
-    }
-
-    fn timestamp_subsec_micros(&self) -> u32 {
-        self.stamp.timestamp_subsec_micros()
-    }
-}
-struct EmbassyNtpSocket<'a, 'b> {
-    socket: &'a UdpSocket<'b>,
-}
-
-impl<'a, 'b> EmbassyNtpSocket<'a, 'b> {
-    fn new(socket: &'a UdpSocket<'b>) -> Self {
-        Self { socket }
-    }
-}
-
-impl NtpUdpSocket for EmbassyNtpSocket<'_, '_> {
-    async fn send_to(&self, buf: &[u8], addr: SocketAddr) -> sntpc::Result<usize> {
-        self.socket
-            .send_to(buf, addr)
-            .await
-            .map_err(|_| sntpc::Error::Network)?;
-        Ok(buf.len())
-    }
-
-    async fn recv_from(&self, buf: &mut [u8]) -> sntpc::Result<(usize, SocketAddr)> {
-        let (len, metadata) = self
-            .socket
-            .recv_from(buf)
-            .await
-            .map_err(|_| sntpc::Error::Network)?;
-        let addr = match metadata.endpoint.addr {
-            IpAddress::Ipv4(ip) => IpAddr::V4(ip),
-            IpAddress::Ipv6(ip) => IpAddr::V6(ip),
-        };
-        Ok((len, SocketAddr::new(addr, metadata.endpoint.port)))
-    }
-}
-
-
 pub struct Esp<'a> {
     pub fs: Arc<Mutex<CriticalSectionRawMutex, Filesystem<'static, LittleFs2Filesystem>>>,
     pub rng: Rng,
@@ -185,15 +120,6 @@ pub struct Esp<'a> {
 // CPU cores/threads, reconsider this.
 unsafe impl Send for Esp<'_> {}
 
-macro_rules! mk_static {
-    ($t:ty,$val:expr) => {{
-        static STATIC_CELL: static_cell::StaticCell<$t> = static_cell::StaticCell::new();
-        #[deny(unused_attributes)]
-        let x = STATIC_CELL.uninit().write(($val));
-        x
-    }};
-}
-
 impl Esp<'_> {
     pub fn get_time(&self) -> DateTime<Utc> {
         DateTime::from_timestamp_micros(self.rtc.current_time_us() as i64)
@@ -355,66 +281,6 @@ impl Esp<'_> {
         self.boot_button.is_low()
     }
 
-    pub(crate) async fn sntp(
-        &mut self,
-        _max_wait_ms: u32,
-        stack: Stack<'_>,
-    ) -> FatResult<DateTime<Utc>> {
-        println!("start sntp");
-        let mut rx_meta = [PacketMetadata::EMPTY; 16];
-        let mut rx_buffer = [0; 4096];
-        let mut tx_meta = [PacketMetadata::EMPTY; 16];
-        let mut tx_buffer = [0; 4096];
-
-        let mut socket = UdpSocket::new(
-            stack,
-            &mut rx_meta,
-            &mut rx_buffer,
-            &mut tx_meta,
-            &mut tx_buffer,
-        );
-        socket.bind(123).context("Could not bind UDP socket")?;
-
-        let context = NtpContext::new(Timestamp::default());
-        let ntp_socket = EmbassyNtpSocket::new(&socket);
-
-        let ntp_addrs = stack
-            .dns_query(NTP_SERVER, DnsQueryType::A)
-            .await
-            .context("Failed to resolve DNS")?;
-
-        if ntp_addrs.is_empty() {
-            bail!("No IP addresses found for NTP server");
-        }
-        let ntp = ntp_addrs[0];
-        info!("NTP server: {ntp:?}");
-
-        let mut counter = 0;
-        loop {
-            let addr: IpAddr = ntp.into();
-            let timeout = get_time(SocketAddr::from((addr, 123)), &ntp_socket, context)
-                .with_timeout(Duration::from_millis((_max_wait_ms / 10) as u64))
-                .await;
-
-            match timeout {
-                Ok(result) => {
-                    let time = result?;
-                    info!("Time: {time:?}");
-                    return DateTime::from_timestamp(time.seconds as i64, 0)
-                        .context("Could not convert Sntp result");
-                }
-                Err(err) => {
-                    warn!("sntp timeout, retry: {err:?}");
-                    counter += 1;
-                    if counter > 10 {
-                        bail!("Failed to get time from NTP server");
-                    }
-                    Timer::after(Duration::from_millis(100)).await;
-                }
-            }
-        }
-    }
-
     pub(crate) async fn wifi_scan(&mut self) -> FatResult<Vec<AccessPointInfo>> {
         info!("start wifi scan");
         let mut lock = self.controller.try_lock()?;
@@ -472,160 +338,6 @@ impl Esp<'_> {
         }
     }
 
-    pub(crate) async fn wifi_ap(&mut self, spawner: Spawner) -> FatResult<Stack<'static>> {
-        let ssid = match self.load_config().await {
-            Ok(config) => config.network.ap_ssid.as_str().to_string(),
-            Err(_) => "PlantCtrl Emergency Mode".to_string(),
-        };
-
-        let device = self
-            .interface_ap
-            .take()
-            .context("AP interface already taken")?;
-        let gw_ip_addr = Ipv4Addr::new(192, 168, 71, 1);
-
-        let config = embassy_net::Config::ipv4_static(StaticConfigV4 {
-            address: Ipv4Cidr::new(gw_ip_addr, 24),
-            gateway: Some(gw_ip_addr),
-            dns_servers: Default::default(),
-        });
-
-        let seed = (self.rng.random() as u64) << 32 | self.rng.random() as u64;
-
-        println!("init secondary stack");
-        // Init network stack
-        let (stack, runner) = embassy_net::new(
-            device,
-            config,
-            mk_static!(StackResources<4>, StackResources::<4>::new()),
-            seed,
-        );
-        let stack = mk_static!(Stack, stack);
-
-        let client_config =
-            Config::AccessPoint(AccessPointConfig::default().with_ssid(ssid.clone()));
-        self.controller.lock().await.set_config(&client_config)?;
-
-        println!("start net task");
-        spawner.spawn(net_task(runner)?);
-        println!("run dhcp");
-        spawner.spawn(run_dhcp(*stack, gw_ip_addr)?);
-
-        loop {
-            if stack.is_link_up() {
-                break;
-            }
-            Timer::after(Duration::from_millis(500)).await;
-        }
-        while !stack.is_config_up() {
-            Timer::after(Duration::from_millis(100)).await
-        }
-        println!("Connect to the AP `${ssid}` and point your browser to http://{gw_ip_addr}/");
-        stack
-            .config_v4()
-            .inspect(|c| println!("ipv4 config: {c:?}"));
-
-        Ok(*stack)
-    }
-
-    pub(crate) async fn wifi(
-        &mut self,
-        network_config: &NetworkConfig,
-        spawner: Spawner,
-    ) -> FatResult<Stack<'static>> {
-        esp_radio::wifi_set_log_verbose();
-        let ssid = match &network_config.ssid {
-            Some(ssid) => {
-                if ssid.is_empty() {
-                    bail!("Wifi ssid was empty")
-                }
-                ssid.to_string()
-            }
-            None => {
-                bail!("Wifi ssid was empty")
-            }
-        };
-        info!("attempting to connect wifi {ssid}");
-        let password = match network_config.password {
-            Some(ref password) => password.to_string(),
-            None => "".to_string(),
-        };
-        let max_wait = network_config.max_wait;
-
-        let device = self
-            .interface_sta
-            .take()
-            .context("STA interface already taken")?;
-        let config = embassy_net::Config::dhcpv4(DhcpConfig::default());
-
-        let seed = (self.rng.random() as u64) << 32 | self.rng.random() as u64;
-
-        // Init network stack
-        let (stack, runner) = embassy_net::new(
-            device,
-            config,
-            mk_static!(StackResources<8>, StackResources::<8>::new()),
-            seed,
-        );
-        let stack = mk_static!(Stack, stack);
-
-        let auth_method = if password.is_empty() {
-            AuthenticationMethod::None
-        } else {
-            AuthenticationMethod::Wpa2Personal
-        };
-        let client_config = StationConfig::default()
-            .with_ssid(ssid)
-            .with_auth_method(auth_method)
-            .with_scan_method(esp_radio::wifi::sta::ScanMethod::AllChannels)
-            .with_listen_interval(10)
-            .with_beacon_timeout(10)
-            .with_failure_retry_cnt(3)
-            .with_password(password);
-
-        self.controller
-            .lock()
-            .await
-            .set_config(&Config::Station(client_config))?;
-        spawner.spawn(net_task(runner)?);
-        self.controller
-            .lock()
-            .await
-            .connect_async()
-            .with_timeout(Duration::from_millis(max_wait as u64 * 1000))
-            .await
-            .context("Timeout waiting for wifi sta connected")??;
-
-        let res = async {
-            while !stack.is_link_up() {
-                Timer::after(Duration::from_millis(500)).await;
-            }
-            Ok::<(), FatError>(())
-        }
-        .with_timeout(Duration::from_millis(max_wait as u64 * 1000))
-        .await;
-
-        if res.is_err() {
-            bail!("Timeout waiting for wifi link up")
-        }
-
-        let res = async {
-            while !stack.is_config_up() {
-                Timer::after(Duration::from_millis(100)).await
-            }
-            Ok::<(), FatError>(())
-        }
-        .with_timeout(Duration::from_millis(max_wait as u64 * 1000))
-        .await;
-
-        if res.is_err() {
-            bail!("Timeout waiting for wifi config up")
-        }
-
-        info!("Connected WIFI, dhcp: {:?}", stack.config_v4());
-        Ok(*stack)
-    }
-
     pub fn deep_sleep_ms(&mut self, duration_in_ms: u64) -> ! {
         // Mark the current OTA image as valid if we reached here while in pending verify.
         if let Ok(cur) = self.ota.current_ota_state() {
@@ -740,275 +452,4 @@ impl Esp<'_> {
         }
     }
 
-    pub(crate) async fn mqtt(
-        &mut self,
-        network_config: &'static NetworkConfig,
-        stack: Stack<'static>,
-        spawner: Spawner,
-    ) -> FatResult<()> {
-        let base_topic = network_config
-            .base_topic
-            .as_ref()
-            .context("missing base topic")?;
-        if base_topic.is_empty() {
-            bail!("Mqtt base_topic was empty")
-        }
-        MQTT_BASE_TOPIC
-            .init(base_topic.to_string())
-            .map_err(|_| FatError::String {
-                error: "Error setting basetopic".to_string(),
-            })?;
-
-        let mqtt_url = network_config
-            .mqtt_url
-            .as_ref()
-            .context("missing mqtt url")?;
-        if mqtt_url.is_empty() {
-            bail!("Mqtt url was empty")
-        }
-
-        let last_will_topic = format!("{base_topic}/state");
-        let round_trip_topic = format!("{base_topic}/internal/roundtrip");
-        let stay_alive_topic = format!("{base_topic}/stay_alive");
-
-        let mut builder: McutieBuilder<'_, String, PublishDisplay<String, &str>, 0> =
-            McutieBuilder::new(stack, "plant ctrl", mqtt_url);
-        if let (Some(mqtt_user), Some(mqtt_password)) = (
-            network_config.mqtt_user.as_ref(),
-            network_config.mqtt_password.as_ref(),
-        ) {
-            builder = builder.with_authentication(mqtt_user, mqtt_password);
-            info!("With authentification");
-        }
-
-        let lwt = Topic::General(last_will_topic);
-        let lwt = mk_static!(Topic<String>, lwt);
-        let lwt = lwt.with_display("lost").retain(true).qos(QoS::AtLeastOnce);
-        builder = builder.with_last_will(lwt);
-        //TODO make configurable
-        builder = builder.with_device_id("plantctrl");
-
-        let builder: McutieBuilder<'_, String, PublishDisplay<String, &str>, 2> = builder
-            .with_subscriptions([
-                Topic::General(round_trip_topic.clone()),
-                Topic::General(stay_alive_topic.clone()),
-            ]);
-
-        let keep_alive = Duration::from_secs(60 * 60 * 2).as_secs() as u16;
-        let (receiver, task) = builder.build(keep_alive);
-
-        spawner.spawn(mqtt_incoming_task(
-            receiver,
-            round_trip_topic.clone(),
-            stay_alive_topic.clone(),
-        )?);
-        spawner.spawn(mqtt_runner(task)?);
-
-        log(LogMessage::StayAlive, 0, 0, "", &stay_alive_topic);
-
-        log(LogMessage::MqttInfo, 0, 0, "", mqtt_url);
-
-        let mqtt_timeout = 15000;
-        let res = async {
-            while !MQTT_CONNECTED_EVENT_RECEIVED.load(Ordering::Relaxed) {
-                crate::hal::PlantHal::feed_watchdog();
-                Timer::after(Duration::from_millis(100)).await;
-            }
-            Ok::<(), FatError>(())
-        }
-        .with_timeout(Duration::from_millis(mqtt_timeout as u64))
-        .await;
-
-        if res.is_err() {
-            bail!("Timeout waiting MQTT connect event")
-        }
-
-        let _ = Topic::General(round_trip_topic.clone())
-            .with_display("online_text")
-            .publish()
-            .await;
-
-        let res = async {
-            while !MQTT_ROUND_TRIP_RECEIVED.load(Ordering::Relaxed) {
-                crate::hal::PlantHal::feed_watchdog();
-                Timer::after(Duration::from_millis(100)).await;
-            }
-            Ok::<(), FatError>(())
-        }
-        .with_timeout(Duration::from_millis(mqtt_timeout as u64))
-        .await;
-
-        if res.is_err() {
-            //ensure we do not further try to publish
-            MQTT_CONNECTED_EVENT_RECEIVED.store(false, Ordering::Relaxed);
-            bail!("Timeout waiting MQTT roundtrip")
-        }
-        Ok(())
-    }
-
-    pub(crate) async fn mqtt_inner(&mut self, subtopic: &str, message: &str) -> FatResult<()> {
-        if !subtopic.starts_with("/") {
-            bail!("Subtopic without / at start {}", subtopic);
-        }
-        if subtopic.len() > 192 {
-            bail!("Subtopic exceeds 192 chars {}", subtopic);
-        }
-        let base_topic = MQTT_BASE_TOPIC
-            .try_get()
-            .context("missing base topic in static!")?;
-
-        let full_topic = format!("{base_topic}{subtopic}");
-
-        loop {
-            let result = Topic::General(full_topic.as_str())
-                .with_display(message)
-                .retain(true)
-                .publish()
-                .await;
-            match result {
-                Ok(()) => return Ok(()),
-                Err(err) => {
-                    let retry = match err {
-                        Error::IOError => false,
-                        Error::TimedOut => true,
-                        Error::TooLarge => false,
-                        Error::PacketError => false,
-                        Error::Invalid => false,
-                        Error::Rejected => false,
-                    };
-                    if !retry {
-                        bail!(
-                            "Error during mqtt send on topic {} with message {:#?} error is {:?}",
-                            &full_topic,
-                            message,
-                            err
-                        );
-                    }
-                    info!(
-                        "Retransmit for {} with message {:#?} error is {:?} retrying {}",
-                        &full_topic, message, err, retry
-                    );
-                    Timer::after(Duration::from_millis(100)).await;
-                }
-            }
-        }
-    }
-    pub(crate) async fn mqtt_publish(&mut self, subtopic: &str, message: &str) {
-        let online = MQTT_CONNECTED_EVENT_RECEIVED.load(Ordering::Relaxed);
-        if !online {
-            return;
-        }
-        let roundtrip_ok = MQTT_ROUND_TRIP_RECEIVED.load(Ordering::Relaxed);
-        if !roundtrip_ok {
-            info!("MQTT roundtrip not received yet, dropping message");
-            return;
-        }
-        match self.mqtt_inner(subtopic, message).await {
-            Ok(()) => {}
-            Err(err) => {
-                info!(
-                    "Error during mqtt send on topic {subtopic} with message {message:#?} error is {err:?}"
-                );
-            }
-        };
-    }
-}
-
-#[embassy_executor::task]
-async fn mqtt_runner(
-    task: McutieTask<'static, String, PublishDisplay<'static, String, &'static str>, 2>,
-) {
-    task.run().await;
-}
-
-#[embassy_executor::task]
-async fn mqtt_incoming_task(
-    receiver: McutieReceiver,
-    round_trip_topic: String,
-    stay_alive_topic: String,
-) {
-    loop {
-        let message = receiver.receive().await;
-        match message {
-            MqttMessage::Connected => {
-                info!("Mqtt connected");
-                MQTT_CONNECTED_EVENT_RECEIVED.store(true, Ordering::Relaxed);
-            }
-            MqttMessage::Publish(topic, payload) => match topic {
-                Topic::DeviceType(_type_topic) => {}
-                Topic::Device(_device_topic) => {}
-                Topic::General(topic) => {
-                    let subtopic = topic.as_str();
-
-                    if subtopic.eq(round_trip_topic.as_str()) {
-                        MQTT_ROUND_TRIP_RECEIVED.store(true, Ordering::Relaxed);
-                    } else if subtopic.eq(stay_alive_topic.as_str()) {
-                        let value = payload.eq_ignore_ascii_case("true".as_ref())
-                            || payload.eq_ignore_ascii_case("1".as_ref());
-                        let a = match value {
-                            true => 1,
-                            false => 0,
-                        };
-                        log(LogMessage::MqttStayAliveRec, a, 0, "", "");
-                        MQTT_STAY_ALIVE.store(value, Ordering::Relaxed);
-                    } else {
-                        log(LogMessage::UnknownTopic, 0, 0, "", &topic);
-                    }
-                }
-            },
-            MqttMessage::Disconnected => {
-                MQTT_CONNECTED_EVENT_RECEIVED.store(false, Ordering::Relaxed);
-                info!("Mqtt disconnected");
-            }
-        }
-    }
-}
-
-#[embassy_executor::task(pool_size = 2)]
-async fn net_task(mut runner: Runner<'static, Interface<'static>>) {
-    runner.run().await;
-}
-
-#[embassy_executor::task]
-async fn run_dhcp(stack: Stack<'static>, ip: Ipv4Addr) {
-    use core::net::SocketAddrV4;
-
-    use edge_dhcp::{
-        io::{self, DEFAULT_SERVER_PORT},
-        server::{Server, ServerOptions},
-    };
-    use edge_nal::UdpBind;
-    use edge_nal_embassy::{Udp, UdpBuffers};
-
-    let mut buf = [0u8; 1500];
-
-    let mut gw_buf = [Ipv4Addr::UNSPECIFIED];
-
-    let buffers = UdpBuffers::<3, 1024, 1024, 10>::new();
-    let unbound_socket = Udp::new(stack, &buffers);
-    let mut bound_socket = match unbound_socket
-        .bind(SocketAddr::V4(SocketAddrV4::new(
-            Ipv4Addr::UNSPECIFIED,
-            DEFAULT_SERVER_PORT,
-        )))
-        .await
-    {
-        Ok(s) => s,
-        Err(e) => {
-            error!("dhcp task failed to bind socket: {:?}", e);
-            return;
-        }
-    };
-
-    loop {
-        _ = io::server::run(
-            &mut Server::<_, 64>::new_with_et(ip),
-            &ServerOptions::new(ip, Some(&mut gw_buf)),
-            &mut bound_socket,
-            &mut buf,
-        )
-        .await
-        .inspect_err(|e| warn!("DHCP server error: {e:?}"));
-        Timer::after(Duration::from_millis(500)).await;
-    }
 }

rust/src/hal/mod.rs

@@ -282,14 +282,7 @@ pub struct FreePeripherals<'a> {
     pub adc1: ADC1<'a>,
 }
 
-macro_rules! mk_static {
-    ($t:ty,$val:expr) => {{
-        static STATIC_CELL: static_cell::StaticCell<$t> = static_cell::StaticCell::new();
-        #[deny(unused_attributes)]
-        let x = STATIC_CELL.uninit().write(($val));
-        x
-    }};
-}
+use crate::util::mk_static;
 
 impl PlantHal {
     pub async fn create() -> Result<Mutex<CriticalSectionRawMutex, HAL<'static>>, FatError> {

rust/src/main.rs

@@ -17,8 +17,8 @@ use esp_backtrace as _;
 use hal::PROGRESS_ACTIVE;
 
 use crate::config::{NetworkConfig, PlantConfig};
-use crate::fat_error::FatResult;
-use crate::hal::esp::MQTT_STAY_ALIVE;
+use crate::fat_error::{ContextExt, FatResult};
+
 use crate::log::log;
 use crate::tank::{determine_tank_state, TankError, TankState, WATER_FROZEN_THRESH};
 use crate::webserver::http_server;
@@ -67,8 +67,11 @@ mod config;
 mod fat_error;
 mod hal;
 mod log;
+mod mqtt;
+mod network;
 mod plant_state;
 mod tank;
+mod util;
 mod webserver;
 
 extern crate alloc;
@@ -83,12 +86,6 @@ enum WaitType {
     MqttConfig,
 }
 
-#[derive(Serialize, Deserialize, Debug, PartialEq)]
-struct Solar {
-    current_ma: u32,
-    voltage_ma: u32,
-}
-
 impl WaitType {
     fn blink_pattern(&self) -> u64 {
         match self {
@@ -114,16 +111,6 @@ struct LightState {
     is_day: bool,
 }
 
-#[derive(Serialize, Deserialize, Debug, PartialEq, Default)]
-///mqtt struct to track pump activities
-struct PumpInfo {
-    enabled: bool,
-    pump_ineffective: bool,
-    median_current_ma: u16,
-    max_current_ma: u16,
-    min_current_ma: u16,
-}
-
 #[derive(Serialize)]
 pub struct PumpResult {
     median_current_ma: u16,
@@ -135,21 +122,7 @@ pub struct PumpResult {
     pump_time_s: u16,
 }
 
-#[derive(Serialize, Debug, PartialEq)]
-enum SntpMode {
-    OFFLINE,
-    SYNC { current: DateTime<Utc> },
-}
 
-#[derive(Serialize, Debug, PartialEq)]
-enum NetworkMode {
-    WIFI {
-        sntp: SntpMode,
-        mqtt: bool,
-        ip_address: String,
-    },
-    OFFLINE,
-}
 
 async fn safe_main(spawner: Spawner) -> FatResult<()> {
     info!("Startup Rust");
@@ -223,7 +196,12 @@ async fn safe_main(spawner: Spawner) -> FatResult<()> {
     {
         info!("No wifi configured, starting initial config mode");
 
-        let stack = board.board_hal.get_esp().wifi_ap(spawner).await?;
+        let esp = board.board_hal.get_esp();
+        let ssid = esp.load_config().await
+            .map(|config| config.network.ap_ssid.to_string())
+            .unwrap_or_else(|_| String::from("PlantCtrl Emergency Mode"));
+        let device = esp.interface_ap.take().context("AP interface already taken")?;
+        let stack = network::wifi_ap(ssid, device, &esp.controller, &mut esp.rng, spawner).await?;
 
         let reboot_now = Arc::new(AtomicBool::new(false));
         println!("starting webserver");
@@ -234,20 +212,30 @@ async fn safe_main(spawner: Spawner) -> FatResult<()> {
 
     let mut stack: OptionLock<Stack> = OptionLock::empty();
     let network_mode = if board.board_hal.get_config().network.ssid.is_some() {
-        try_connect_wifi_sntp_mqtt(&mut board, &mut stack, spawner).await
+        network::try_connect_wifi_sntp_mqtt(&mut board, &mut stack, spawner).await
     } else {
         info!("No wifi configured");
         //the current sensors require this amount to stabilize, in the case of Wi-Fi this is already handled due to connect timings;
         Timer::after_millis(100).await;
-        NetworkMode::OFFLINE
+      network::NetworkMode::OFFLINE
     };
 
-    if matches!(network_mode, NetworkMode::OFFLINE) && to_config {
+    if matches!(network_mode, network::NetworkMode::OFFLINE) && to_config {
         info!("Could not connect to station and config mode forced, switching to ap mode!");
 
         let res = {
             let esp = board.board_hal.get_esp();
-            esp.wifi_ap(spawner).await
+            let ssid = esp.load_config().await
+                .map(|config| config.network.ap_ssid.to_string())
+                .unwrap_or_else(|_| String::from("PlantCtrl Emergency Mode"));
+            let device = match esp.interface_ap.take() {
+                Some(d) => d,
+                None => {
+                    use crate::fat_error::FatError;
+                    return Err(FatError::String { error: "AP interface already taken".to_string() });
+                }
+            };
+            network::wifi_ap(ssid, device, &esp.controller, &mut esp.rng, spawner).await
         };
         match res {
             Ok(ap_stack) => {
@@ -276,23 +264,24 @@ async fn safe_main(spawner: Spawner) -> FatResult<()> {
         timezone_time
     );
 
-    if let NetworkMode::WIFI { ref ip_address, .. } = network_mode {
+    if let network::NetworkMode::WIFI { ref ip_address, .. } = network_mode {
         publish_firmware_info(&mut board, version, ip_address, &timezone_time.to_rfc3339()).await;
         publish_battery_state(&mut board).await;
         let _ = publish_mppt_state(&mut board).await;
+        publish_config(&mut board).await;
     }
 
     log(
         LogMessage::StartupInfo,
-        matches!(network_mode, NetworkMode::WIFI { .. }) as u32,
+        matches!(network_mode, network::NetworkMode::WIFI { .. }) as u32,
         matches!(
             network_mode,
-            NetworkMode::WIFI {
-                sntp: SntpMode::SYNC { .. },
+            network::NetworkMode::WIFI {
+                sntp: network::SntpMode::SYNC { .. },
                 ..
             }
         ) as u32,
-        matches!(network_mode, NetworkMode::WIFI { mqtt: true, .. })
+        matches!(network_mode, network::NetworkMode::WIFI { mqtt: true, .. })
             .to_string()
             .as_str(),
         "",
@@ -536,11 +525,7 @@ async fn safe_main(spawner: Spawner) -> FatResult<()> {
 
     match &serde_json::to_string(&light_state) {
         Ok(state) => {
-            let _ = board
-                .board_hal
-                .get_esp()
-                .mqtt_publish("/light", state)
-                .await;
+            let _ = mqtt::publish("/light", state).await;
         }
         Err(err) => {
             info!("Error publishing lightstate {}", err);
@@ -550,29 +535,16 @@ async fn safe_main(spawner: Spawner) -> FatResult<()> {
     let deep_sleep_duration_minutes: u32 =
         // if battery soc is unknown assume battery has enough change
         if state_of_charge < 10.0 && !matches!(battery_state, BatteryState::Unknown) {
-            let _ = board
-                .board_hal
-                .get_esp()
-                .mqtt_publish("/deepsleep", "low Volt 12h").await;
+            let _ = mqtt::publish("/deepsleep", "low Volt 12h").await;
             12 * 60
         } else if is_day {
-            let _ = board
-                .board_hal
-                .get_esp()
-                .mqtt_publish("/deepsleep", "normal 20m").await;
+            let _ = mqtt::publish("/deepsleep", "normal 20m").await;
             20
         } else {
-            let _ = board
-                .board_hal
-                .get_esp()
-                .mqtt_publish("/deepsleep", "night 1h").await;
+            let _ = mqtt::publish("/deepsleep", "night 1h").await;
             60
         };
-    let _ = board
-        .board_hal
-        .get_esp()
-        .mqtt_publish("/state", "sleep")
-        .await;
+    let _ = mqtt::publish("/state", "sleep").await;
 
     info!("Go to sleep for {} minutes", deep_sleep_duration_minutes);
     //determine next event
@@ -582,7 +554,7 @@ async fn safe_main(spawner: Spawner) -> FatResult<()> {
     //TODO
     //mark_app_valid();
 
-    let stay_alive = MQTT_STAY_ALIVE.load(Ordering::Relaxed);
+    let stay_alive = mqtt::is_stay_alive();
     info!("Check stay alive, current state is {}", stay_alive);
 
     if stay_alive {
@@ -737,7 +709,7 @@ async fn publish_tank_state(
         &tank_state.as_mqtt_info(&board.board_hal.get_config().tank, &water_temp),
     )
     .unwrap();
-    let _ = board.board_hal.get_esp().mqtt_publish("/water", &*state);
+    let _ = mqtt::publish("/water", &*state).await;
 }
 
 async fn publish_plant_states(
@@ -753,11 +725,7 @@ async fn publish_plant_states(
         let state =
             serde_json::to_string(&plant_state.to_mqtt_info(plant_conf, timezone_time)).unwrap();
         let plant_topic = format!("/plant{}", plant_id + 1);
-        let _ = board
-            .board_hal
-            .get_esp()
-            .mqtt_publish(&plant_topic, &state)
-            .await;
+        let _ = mqtt::publish(&plant_topic, &state).await;
     }
 }
 
@@ -767,92 +735,13 @@ async fn publish_firmware_info(
     ip_address: &str,
     timezone_time: &str,
 ) {
-    let esp = board.board_hal.get_esp();
-    esp.mqtt_publish("/firmware/address", ip_address).await;
-    esp.mqtt_publish("/firmware/state", format!("{:?}", &version).as_str())
+    mqtt::publish("/firmware/address", ip_address).await;
+    mqtt::publish("/firmware/state", format!("{:?}", &version).as_str())
         .await;
-    esp.mqtt_publish("/firmware/last_online", timezone_time)
+    mqtt::publish("/firmware/last_online", timezone_time)
         .await;
-    esp.mqtt_publish("/state", "online").await;
+    mqtt::publish("/state", "online").await;
 }
-macro_rules! mk_static {
-    ($t:ty,$val:expr) => {{
-        static STATIC_CELL: static_cell::StaticCell<$t> = static_cell::StaticCell::new();
-        #[deny(unused_attributes)]
-        let x = STATIC_CELL.uninit().write(($val));
-        x
-    }};
-}
-async fn try_connect_wifi_sntp_mqtt(
-    board: &mut MutexGuard<'static, CriticalSectionRawMutex, HAL<'static>>,
-    stack_store: &mut OptionLock<Stack<'static>>,
-    spawner: Spawner,
-) -> NetworkMode {
-    let nw_conf = &board.board_hal.get_config().network.clone();
-    match board.board_hal.get_esp().wifi(nw_conf, spawner).await {
-        Ok(stack) => {
-            stack_store.replace(stack);
-
-            let sntp_mode: SntpMode = match board.board_hal.get_esp().sntp(1000 * 10, stack).await {
-                Ok(new_time) => {
-                    info!("Using time from sntp {}", new_time.to_rfc3339());
-                    let _ = board
-                        .board_hal
-                        .get_rtc_module()
-                        .set_rtc_time(&new_time)
-                        .await;
-                    SntpMode::SYNC { current: new_time }
-                }
-                Err(err) => {
-                    warn!("sntp error: {err}");
-                    board.board_hal.general_fault(true).await;
-                    SntpMode::OFFLINE
-                }
-            };
-
-            let mqtt_connected = if board.board_hal.get_config().network.mqtt_url.is_some() {
-                let nw_config = board.board_hal.get_config().network.clone();
-                let nw_config = mk_static!(NetworkConfig, nw_config);
-                match board
-                    .board_hal
-                    .get_esp()
-                    .mqtt(nw_config, stack, spawner)
-                    .await
-                {
-                    Ok(_) => {
-                        info!("Mqtt connection ready");
-                        true
-                    }
-                    Err(err) => {
-                        warn!("Could not connect mqtt due to {err}");
-                        false
-                    }
-                }
-            } else {
-                false
-            };
-
-            let ip = match stack.config_v4() {
-                Some(config) => config.address.address().to_string(),
-                None => match stack.config_v6() {
-                    Some(config) => config.address.address().to_string(),
-                    None => String::from("No IP"),
-                },
-            };
-            NetworkMode::WIFI {
-                sntp: sntp_mode,
-                mqtt: mqtt_connected,
-                ip_address: ip,
-            }
-        }
-        Err(err) => {
-            info!("Offline mode due to {err}");
-            board.board_hal.general_fault(true).await;
-            NetworkMode::OFFLINE
-        }
-    }
-}
-
 async fn pump_info(
     plant_id: usize,
     pump_active: bool,
@@ -862,7 +751,7 @@ async fn pump_info(
     min_current_ma: u16,
     _error: bool,
 ) {
-    let pump_info = PumpInfo {
+    let pump_info = mqtt::PumpInfo {
         enabled: pump_active,
         pump_ineffective,
         median_current_ma,
@@ -873,15 +762,7 @@ async fn pump_info(
 
     match serde_json::to_string(&pump_info) {
         Ok(state) => {
-            BOARD_ACCESS
-                .get()
-                .await
-                .lock()
-                .await
-                .board_hal
-                .get_esp()
-                .mqtt_publish(&pump_topic, &state)
-                .await;
+            let _ = mqtt::publish(&pump_topic, &state).await;
         }
         Err(err) => {
             warn!("Error publishing pump state {}", err);
@@ -894,15 +775,12 @@ async fn publish_mppt_state(
 ) -> FatResult<()> {
     let current = board.board_hal.get_mptt_current().await?;
     let voltage = board.board_hal.get_mptt_voltage().await?;
-    let solar_state = Solar {
+    let solar_state = mqtt::Solar {
         current_ma: current.as_milliamperes() as u32,
         voltage_ma: voltage.as_millivolts() as u32,
     };
     if let Ok(serialized_solar_state_bytes) = serde_json::to_string(&solar_state) {
-        let _ = board
-            .board_hal
-            .get_esp()
-            .mqtt_publish("/mppt", &serialized_solar_state_bytes);
+        let _ = mqtt::publish("/mppt", &serialized_solar_state_bytes).await;
     }
     Ok(())
 }
@@ -923,14 +801,25 @@ async fn publish_battery_state(
         Err(_) => "error".to_owned(),
     };
     {
-        let _ = board
-            .board_hal
-            .get_esp()
-            .mqtt_publish("/battery", &*value)
-            .await;
+        let _ = mqtt::publish("/battery", &*value).await;
     }
 }
 
+async fn publish_config(
+    board: &mut MutexGuard<'_, CriticalSectionRawMutex, HAL<'_>>,
+) {
+    let config = board.board_hal.get_config();
+    match serde_json::to_string(&config) {
+        Ok(serialized) => {
+            let _ = mqtt::publish("/config", &serialized).await;
+        }
+        Err(err) => {
+            info!("Error serializing config: {}", err);
+        }
+    }
+}
+
+
 async fn wait_infinity(
     board: MutexGuard<'_, CriticalSectionRawMutex, HAL<'static>>,
     wait_type: WaitType,
@@ -1031,9 +920,8 @@ async fn wait_infinity(
                 let cur = board.board_hal.get_time().await;
                 let timezone_time = cur.with_timezone(&timezone);
 
-                let esp = board.board_hal.get_esp();
-                esp.mqtt_publish("/state", "config").await;
-                esp.mqtt_publish("/firmware/last_online", &timezone_time.to_rfc3339())
+                mqtt::publish("/state", "config").await;
+                mqtt::publish("/firmware/last_online", &timezone_time.to_rfc3339())
                     .await;
                 last_mqtt_update = Some(now);
             }
@@ -1087,7 +975,7 @@ async fn wait_infinity(
 
         hal::PlantHal::feed_watchdog();
 
-        if wait_type == WaitType::MqttConfig && !MQTT_STAY_ALIVE.load(Ordering::Relaxed) {
+        if wait_type == WaitType::MqttConfig && !mqtt::is_stay_alive() {
             reboot_now.store(true, Ordering::Relaxed);
         }
         if reboot_now.load(Ordering::Relaxed) {

rust/src/mqtt.rs

@@ -0,0 +1,315 @@
+use crate::bail;
+use crate::config::NetworkConfig;
+use crate::fat_error::{ContextExt, FatError, FatResult};
+use crate::hal::PlantHal;
+use crate::log::{log, LogMessage};
+use alloc::string::String;
+use alloc::{format, string::ToString, vec::Vec};
+use core::sync::atomic::Ordering;
+use embassy_executor::Spawner;
+use embassy_net::Stack;
+use embassy_sync::blocking_mutex::raw::CriticalSectionRawMutex;
+use embassy_sync::mutex::Mutex;
+use embassy_sync::once_lock::OnceLock;
+use embassy_time::{Duration, Timer, WithTimeout};
+use log::info;
+use mcutie::{
+    Error, McutieBuilder, McutieReceiver, McutieTask, MqttMessage, PublishDisplay, Publishable,
+    QoS, Topic,
+};
+use portable_atomic::AtomicBool;
+use serde::{Deserialize, Serialize};
+
+#[derive(Serialize, Deserialize, Debug, PartialEq, Default)]
+pub struct PumpInfo {
+    pub enabled: bool,
+    pub pump_ineffective: bool,
+    pub median_current_ma: u16,
+    pub max_current_ma: u16,
+    pub min_current_ma: u16,
+}
+
+#[derive(Serialize, Debug, PartialEq)]
+pub struct Solar {
+    pub current_ma: u32,
+    pub voltage_ma: u32,
+}
+
+static MQTT_CONNECTED_EVENT_RECEIVED: AtomicBool = AtomicBool::new(false);
+static MQTT_ROUND_TRIP_RECEIVED: AtomicBool = AtomicBool::new(false);
+pub static MQTT_STAY_ALIVE: AtomicBool = AtomicBool::new(false);
+static MQTT_BASE_TOPIC: OnceLock<String> = OnceLock::new();
+static MQTT_CONFIG_UPDATE_PAYLOAD: Mutex<CriticalSectionRawMutex, Option<String>> = Mutex::new(None);
+
+pub fn is_stay_alive() -> bool {
+    MQTT_STAY_ALIVE.load(Ordering::Relaxed)
+}
+
+pub async fn publish(subtopic: &str, message: &str) {
+    let online = MQTT_CONNECTED_EVENT_RECEIVED.load(Ordering::Relaxed);
+    if !online {
+        return;
+    }
+    let roundtrip_ok = MQTT_ROUND_TRIP_RECEIVED.load(Ordering::Relaxed);
+    if !roundtrip_ok {
+        info!("MQTT roundtrip not received yet, dropping message");
+        return;
+    }
+    match publish_inner(subtopic, message).await {
+        Ok(()) => {}
+        Err(err) => {
+            info!(
+                "Error during mqtt send on topic {subtopic} with message {message:#?} error is {err:?}"
+            );
+        }
+    };
+}
+
+async fn publish_inner(subtopic: &str, message: &str) -> FatResult<()> {
+    if !subtopic.starts_with("/") {
+        bail!("Subtopic without / at start {}", subtopic);
+    }
+    if subtopic.len() > 192 {
+        bail!("Subtopic exceeds 192 chars {}", subtopic);
+    }
+    let base_topic = MQTT_BASE_TOPIC
+        .try_get()
+        .context("missing base topic in static!")?;
+
+    let full_topic = format!("{base_topic}{subtopic}");
+
+    loop {
+        let result = Topic::General(full_topic.as_str())
+            .with_display(message)
+            .retain(true)
+            .publish()
+            .await;
+        match result {
+            Ok(()) => return Ok(()),
+            Err(err) => {
+                let retry = match err {
+                    Error::IOError => false,
+                    Error::TimedOut => true,
+                    Error::TooLarge => false,
+                    Error::PacketError => false,
+                    Error::Invalid => false,
+                    Error::Rejected => false,
+                };
+                if !retry {
+                    bail!(
+                        "Error during mqtt send on topic {} with message {:#?} error is {:?}",
+                        &full_topic,
+                        message,
+                        err
+                    );
+                }
+                info!(
+                    "Retransmit for {} with message {:#?} error is {:?} retrying {}",
+                    &full_topic, message, err, retry
+                );
+                Timer::after(Duration::from_millis(100)).await;
+            }
+        }
+    }
+}
+
+use crate::util::mk_static;
+
+pub async fn mqtt_init(
+    network_config: &'static NetworkConfig,
+    stack: Stack<'static>,
+    spawner: Spawner,
+) -> FatResult<()> {
+    let base_topic = network_config
+        .base_topic
+        .as_ref()
+        .context("missing base topic")?;
+    if base_topic.is_empty() {
+        bail!("Mqtt base_topic was empty")
+    }
+    MQTT_BASE_TOPIC
+        .init(base_topic.to_string())
+        .map_err(|_| FatError::String {
+            error: "Error setting basetopic".to_string(),
+        })?;
+
+    let mqtt_url = network_config
+        .mqtt_url
+        .as_ref()
+        .context("missing mqtt url")?;
+    if mqtt_url.is_empty() {
+        bail!("Mqtt url was empty")
+    }
+
+    let last_will_topic = format!("{base_topic}/state");
+    let round_trip_topic = format!("{base_topic}/internal/roundtrip");
+    let stay_alive_topic = format!("{base_topic}/stay_alive");
+    let config_update_payload_topic = format!("{base_topic}/config/update_payload");
+    let config_update_topic = format!("{base_topic}/config/update");
+
+    let mut builder: McutieBuilder<'_, String, PublishDisplay<String, &str>, 0> =
+        McutieBuilder::new(stack, "plant ctrl", mqtt_url);
+    if let (Some(mqtt_user), Some(mqtt_password)) = (
+        network_config.mqtt_user.as_ref(),
+        network_config.mqtt_password.as_ref(),
+    ) {
+        builder = builder.with_authentication(mqtt_user, mqtt_password);
+        info!("With authentification");
+    }
+
+    let lwt = Topic::General(last_will_topic);
+    let lwt = mk_static!(Topic<String>, lwt);
+    let lwt = lwt.with_display("lost").retain(true).qos(QoS::AtLeastOnce);
+    builder = builder.with_last_will(lwt);
+    //TODO make configurable
+    builder = builder.with_device_id("plantctrl");
+
+    let builder: McutieBuilder<'_, String, PublishDisplay<String, &str>, 4> = builder
+        .with_subscriptions([
+            Topic::General(round_trip_topic.clone()),
+            Topic::General(stay_alive_topic.clone()),
+            Topic::General(config_update_payload_topic.clone()),
+            Topic::General(config_update_topic.clone()),
+        ]);
+
+    let keep_alive = Duration::from_secs(60 * 60 * 2).as_secs() as u16;
+    let (receiver, task) = builder.build(keep_alive);
+
+    spawner.spawn(mqtt_incoming_task(
+        receiver,
+        round_trip_topic.clone(),
+        stay_alive_topic.clone(),
+        config_update_payload_topic.clone(),
+        config_update_topic.clone(),
+    )?);
+    spawner.spawn(mqtt_runner(task)?);
+
+    log(LogMessage::StayAlive, 0, 0, "", &stay_alive_topic);
+
+    log(LogMessage::MqttInfo, 0, 0, "", mqtt_url);
+
+    let mqtt_timeout = 15000;
+    let res = async {
+        while !MQTT_CONNECTED_EVENT_RECEIVED.load(Ordering::Relaxed) {
+            PlantHal::feed_watchdog();
+            Timer::after(Duration::from_millis(100)).await;
+        }
+        Ok::<(), FatError>(())
+    }
+    .with_timeout(Duration::from_millis(mqtt_timeout as u64))
+    .await;
+
+    if res.is_err() {
+        bail!("Timeout waiting MQTT connect event")
+    }
+
+    let _ = Topic::General(round_trip_topic.clone())
+        .with_display("online_text")
+        .publish()
+        .await;
+
+    let res = async {
+        while !MQTT_ROUND_TRIP_RECEIVED.load(Ordering::Relaxed) {
+            PlantHal::feed_watchdog();
+            Timer::after(Duration::from_millis(100)).await;
+        }
+        Ok::<(), FatError>(())
+    }
+    .with_timeout(Duration::from_millis(mqtt_timeout as u64))
+    .await;
+
+    if res.is_err() {
+        MQTT_CONNECTED_EVENT_RECEIVED.store(false, Ordering::Relaxed);
+        bail!("Timeout waiting MQTT roundtrip")
+    }
+    Ok(())
+}
+
+#[embassy_executor::task]
+async fn mqtt_runner(
+    task: McutieTask<'static, String, PublishDisplay<'static, String, &'static str>, 4>,
+) {
+    task.run().await;
+}
+
+#[embassy_executor::task]
+async fn mqtt_incoming_task(
+    receiver: McutieReceiver,
+    round_trip_topic: String,
+    stay_alive_topic: String,
+    config_update_payload_topic: String,
+    config_update_topic: String,
+) {
+    loop {
+        let message = receiver.receive().await;
+        match message {
+            MqttMessage::Connected => {
+                info!("Mqtt connected");
+                MQTT_CONNECTED_EVENT_RECEIVED.store(true, Ordering::Relaxed);
+            }
+            MqttMessage::Publish(topic, payload) => match topic {
+                Topic::DeviceType(_type_topic) => {}
+                Topic::Device(_device_topic) => {}
+                Topic::General(topic) => {
+                    let subtopic = topic.as_str();
+
+                    if subtopic.eq(round_trip_topic.as_str()) {
+                        MQTT_ROUND_TRIP_RECEIVED.store(true, Ordering::Relaxed);
+                    } else if subtopic.eq(stay_alive_topic.as_str()) {
+                        let value = payload.eq_ignore_ascii_case("true".as_ref())
+                            || payload.eq_ignore_ascii_case("1".as_ref());
+                        let a = match value {
+                            true => 1,
+                            false => 0,
+                        };
+                        log(LogMessage::MqttStayAliveRec, a, 0, "", "");
+                        MQTT_STAY_ALIVE.store(value, Ordering::Relaxed);
+                    } else if subtopic.eq(config_update_payload_topic.as_str()) {
+                        let payload_str = String::from_utf8_lossy(&payload[..]).to_string();
+                        let mut buffer = MQTT_CONFIG_UPDATE_PAYLOAD.lock().await;
+                        *buffer = Some(payload_str);
+                        info!("MQTT config update payload received");
+                    } else if subtopic.eq(config_update_topic.as_str()) {
+                        let update_requested = payload.eq_ignore_ascii_case("true".as_ref())
+                            || payload.eq_ignore_ascii_case("1".as_ref());
+                        if update_requested {
+                            info!("MQTT config update requested");
+                            let payload_lock = MQTT_CONFIG_UPDATE_PAYLOAD.lock().await;
+                            if let Some(payload_str) = payload_lock.as_ref() {
+                                match serde_json::from_str::<crate::config::PlantControllerConfig>(payload_str) {
+                                    Ok(config) => {
+                                        info!("Deserialized config, applying...");
+                                        let board_mutex = crate::BOARD_ACCESS.get().await;
+                                        let mut board = board_mutex.lock().await;
+                                        if let Err(e) = board.board_hal.get_esp().save_config(payload_str.as_bytes().to_vec()).await {
+                                            info!("Error saving config to flash: {}", e);
+                                            let _ = publish("/config/update", "false").await;
+                                        } else {
+                                            board.board_hal.set_config(config);
+                                            info!("Config applied, rebooting");
+                                            let _ = publish("/config/update", "false").await;
+                                            board.board_hal.get_esp().deep_sleep_ms(0);
+                                        }
+                                    }
+                                    Err(e) => {
+                                        info!("Error deserializing config: {}", e);
+                                        let _ = publish("/config/update", "false").await;
+                                    }
+                                }
+                            } else {
+                                info!("No config update payload available");
+                                let _ = publish("/config/update", "false").await;
+                            }
+                        }
+                    } else {
+                        log(LogMessage::UnknownTopic, 0, 0, "", &topic);
+                    }
+                }
+            },
+            MqttMessage::Disconnected => {
+                MQTT_CONNECTED_EVENT_RECEIVED.store(false, Ordering::Relaxed);
+                info!("Mqtt disconnected");
+            }
+        }
+    }
+}

rust/src/network.rs

@@ -0,0 +1,419 @@
+use crate::bail;
+use crate::config::NetworkConfig;
+use crate::fat_error::{ContextExt, FatError, FatResult};
+use crate::hal::{PlantHal, HAL};
+use crate::mqtt;
+use crate::util::mk_static;
+use alloc::string::{String, ToString};
+use alloc::sync::Arc;
+use chrono::{DateTime, Utc};
+use core::net::{IpAddr, Ipv4Addr, SocketAddr, SocketAddrV4};
+use embassy_executor::Spawner;
+use embassy_net::dns::DnsQueryType;
+use embassy_net::udp::{PacketMetadata, UdpSocket};
+use embassy_net::{DhcpConfig, Runner, Stack, StackResources, StaticConfigV4};
+use embassy_sync::blocking_mutex::raw::CriticalSectionRawMutex;
+use embassy_sync::mutex::{Mutex, MutexGuard};
+use embassy_time::{Duration, Timer, WithTimeout};
+use option_lock::OptionLock;
+use edge_dhcp::{
+    io::{self, DEFAULT_SERVER_PORT},
+    server::{Server, ServerOptions},
+};
+use edge_nal::UdpBind;
+use edge_nal_embassy::{Udp, UdpBuffers};
+use esp_hal::rng::Rng;
+use esp_println::println;
+use esp_radio::wifi::ap::AccessPointConfig;
+use esp_radio::wifi::sta::StationConfig;
+use esp_radio::wifi::{AuthenticationMethod, Config, Interface};
+use log::{info, warn, error};
+use serde::Serialize;
+use sntpc::{NtpContext, NtpTimestampGenerator, NtpUdpSocket, get_time};
+
+const NTP_SERVER: &str = "pool.ntp.org";
+
+#[derive(Copy, Clone, Default)]
+struct Timestamp {
+    stamp: DateTime<Utc>,
+}
+
+impl NtpTimestampGenerator for Timestamp {
+    fn init(&mut self) {
+        self.stamp = DateTime::default();
+    }
+
+    fn timestamp_sec(&self) -> u64 {
+        self.stamp.timestamp() as u64
+    }
+
+    fn timestamp_subsec_micros(&self) -> u32 {
+        self.stamp.timestamp_subsec_micros()
+    }
+}
+
+struct EmbassyNtpSocket<'a, 'b> {
+    socket: &'a UdpSocket<'b>,
+}
+
+impl<'a, 'b> EmbassyNtpSocket<'a, 'b> {
+    fn new(socket: &'a UdpSocket<'b>) -> Self {
+        Self { socket }
+    }
+}
+
+impl NtpUdpSocket for EmbassyNtpSocket<'_, '_> {
+    async fn send_to(&self, buf: &[u8], addr: SocketAddr) -> sntpc::Result<usize> {
+        self.socket
+            .send_to(buf, addr)
+            .await
+            .map_err(|_| sntpc::Error::Network)?;
+        Ok(buf.len())
+    }
+
+    async fn recv_from(&self, buf: &mut [u8]) -> sntpc::Result<(usize, SocketAddr)> {
+        let (len, metadata) = self
+            .socket
+            .recv_from(buf)
+            .await
+            .map_err(|_| sntpc::Error::Network)?;
+        let addr = match metadata.endpoint.addr {
+            embassy_net::IpAddress::Ipv4(ip) => IpAddr::V4(ip),
+            embassy_net::IpAddress::Ipv6(ip) => IpAddr::V6(ip),
+        };
+        Ok((len, SocketAddr::new(addr, metadata.endpoint.port)))
+    }
+}
+
+pub async fn sntp(max_wait_ms: u32, stack: Stack<'_>) -> FatResult<DateTime<Utc>> {
+    println!("start sntp");
+    let mut rx_meta = [PacketMetadata::EMPTY; 16];
+    let mut rx_buffer = [0; 4096];
+    let mut tx_meta = [PacketMetadata::EMPTY; 16];
+    let mut tx_buffer = [0; 4096];
+
+    let mut socket = UdpSocket::new(
+        stack,
+        &mut rx_meta,
+        &mut rx_buffer,
+        &mut tx_meta,
+        &mut tx_buffer,
+    );
+    socket.bind(123).context("Could not bind UDP socket")?;
+
+    let context = NtpContext::new(Timestamp::default());
+    let ntp_socket = EmbassyNtpSocket::new(&socket);
+
+    let ntp_addrs = stack
+        .dns_query(NTP_SERVER, DnsQueryType::A)
+        .await
+        .context("Failed to resolve DNS")?;
+
+    if ntp_addrs.is_empty() {
+        bail!("No IP addresses found for NTP server");
+    }
+    let ntp = ntp_addrs[0];
+    info!("NTP server: {ntp:?}");
+
+    let mut counter = 0;
+    loop {
+        let addr: IpAddr = ntp.into();
+        let timeout = get_time(SocketAddr::from((addr, 123)), &ntp_socket, context)
+            .with_timeout(Duration::from_millis((max_wait_ms / 10) as u64))
+            .await;
+
+        match timeout {
+            Ok(result) => {
+                let time = result?;
+                info!("Time: {time:?}");
+                return DateTime::from_timestamp(time.seconds as i64, 0)
+                    .context("Could not convert Sntp result");
+            }
+            Err(err) => {
+                warn!("sntp timeout, retry: {err:?}");
+                counter += 1;
+                if counter > 10 {
+                    bail!("Failed to get time from NTP server");
+                }
+                Timer::after(Duration::from_millis(100)).await;
+            }
+        }
+    }
+}
+
+#[derive(Serialize, Debug, PartialEq)]
+pub enum SntpMode {
+    OFFLINE,
+    SYNC { current: DateTime<Utc> },
+}
+
+#[derive(Serialize, Debug, PartialEq)]
+pub enum NetworkMode {
+    WIFI {
+        sntp: SntpMode,
+        mqtt: bool,
+        ip_address: String,
+    },
+    OFFLINE,
+}
+
+#[embassy_executor::task(pool_size = 2)]
+pub(crate) async fn net_task(mut runner: Runner<'static, Interface<'static>>) {
+    runner.run().await;
+}
+
+#[embassy_executor::task]
+pub(crate) async fn run_dhcp(stack: Stack<'static>, ip: Ipv4Addr) {
+    let mut buf = [0u8; 1500];
+
+    let mut gw_buf = [Ipv4Addr::UNSPECIFIED];
+
+    let buffers = UdpBuffers::<3, 1024, 1024, 10>::new();
+    let unbound_socket = Udp::new(stack, &buffers);
+    let mut bound_socket = match unbound_socket
+        .bind(SocketAddr::V4(SocketAddrV4::new(
+            Ipv4Addr::UNSPECIFIED,
+            DEFAULT_SERVER_PORT,
+        )))
+        .await
+    {
+        Ok(s) => s,
+        Err(e) => {
+            error!("dhcp task failed to bind socket: {:?}", e);
+            return;
+        }
+    };
+
+    loop {
+        _ = io::server::run(
+            &mut Server::<_, 64>::new_with_et(ip),
+            &ServerOptions::new(ip, Some(&mut gw_buf)),
+            &mut bound_socket,
+            &mut buf,
+        )
+        .await
+        .inspect_err(|e| warn!("DHCP server error: {e:?}"));
+        Timer::after(Duration::from_millis(500)).await;
+    }
+}
+
+pub async fn wifi_ap(
+    ssid: String,
+    interface_ap: Interface<'static>,
+    controller: &Arc<Mutex<CriticalSectionRawMutex, esp_radio::wifi::WifiController<'static>>>,
+    rng: &mut Rng,
+    spawner: Spawner,
+) -> FatResult<Stack<'static>> {
+    let gw_ip_addr = Ipv4Addr::new(192, 168, 71, 1);
+
+    let config = embassy_net::Config::ipv4_static(StaticConfigV4 {
+        address: embassy_net::Ipv4Cidr::new(gw_ip_addr, 24),
+        gateway: Some(gw_ip_addr),
+        dns_servers: Default::default(),
+    });
+
+    let seed = (rng.random() as u64) << 32 | rng.random() as u64;
+
+    println!("init secondary stack");
+    let (stack, runner) = embassy_net::new(
+        interface_ap,
+        config,
+        mk_static!(StackResources<4>, StackResources::<4>::new()),
+        seed,
+    );
+    let stack = mk_static!(Stack, stack);
+
+    let client_config =
+        Config::AccessPoint(AccessPointConfig::default().with_ssid(ssid.clone()));
+    controller.lock().await.set_config(&client_config)?;
+
+    println!("start net task");
+    spawner.spawn(net_task(runner)?);
+    println!("run dhcp");
+    spawner.spawn(run_dhcp(*stack, gw_ip_addr)?);
+
+    loop {
+        if stack.is_link_up() {
+            break;
+        }
+        Timer::after(Duration::from_millis(500)).await;
+    }
+    while !stack.is_config_up() {
+        Timer::after(Duration::from_millis(100)).await
+    }
+    println!("Connect to the AP `${ssid}` and point your browser to http://{gw_ip_addr}/");
+    stack
+        .config_v4()
+        .inspect(|c| println!("ipv4 config: {c:?}"));
+
+    Ok(*stack)
+}
+
+pub async fn wifi(
+    network_config: &NetworkConfig,
+    interface_sta: Interface<'static>,
+    controller: &Arc<Mutex<CriticalSectionRawMutex, esp_radio::wifi::WifiController<'static>>>,
+    rng: &mut Rng,
+    spawner: Spawner,
+) -> FatResult<Stack<'static>> {
+    esp_radio::wifi_set_log_verbose();
+    let ssid = match &network_config.ssid {
+        Some(ssid) => {
+            if ssid.is_empty() {
+                bail!("Wifi ssid was empty")
+            }
+            ssid.as_str().to_string()
+        }
+        None => {
+            bail!("Wifi ssid was empty")
+        }
+    };
+    info!("attempting to connect wifi {ssid}");
+    let password = match network_config.password {
+        Some(ref password) => password.as_str().to_string(),
+        None => "".to_string(),
+    };
+    let max_wait = network_config.max_wait;
+
+    let config = embassy_net::Config::dhcpv4(DhcpConfig::default());
+
+    let seed = (rng.random() as u64) << 32 | rng.random() as u64;
+
+    let (stack, runner) = embassy_net::new(
+        interface_sta,
+        config,
+        mk_static!(StackResources<8>, StackResources::<8>::new()),
+        seed,
+    );
+    let stack = mk_static!(Stack, stack);
+
+    let auth_method = if password.is_empty() {
+        AuthenticationMethod::None
+    } else {
+        AuthenticationMethod::Wpa2Personal
+    };
+    let client_config = StationConfig::default()
+        .with_ssid(ssid)
+        .with_auth_method(auth_method)
+        .with_scan_method(esp_radio::wifi::sta::ScanMethod::AllChannels)
+        .with_listen_interval(10)
+        .with_beacon_timeout(10)
+        .with_failure_retry_cnt(3)
+        .with_password(password);
+
+    controller
+        .lock()
+        .await
+        .set_config(&Config::Station(client_config))?;
+    spawner.spawn(net_task(runner)?);
+    controller
+        .lock()
+        .await
+        .connect_async()
+        .with_timeout(Duration::from_millis(max_wait as u64 * 1000))
+        .await
+        .context("Timeout waiting for wifi sta connected")??;
+
+    let res = async {
+        while !stack.is_link_up() {
+            Timer::after(Duration::from_millis(500)).await;
+        }
+        Ok::<(), FatError>(())
+    }
+    .with_timeout(Duration::from_millis(max_wait as u64 * 1000))
+    .await;
+
+    if res.is_err() {
+        bail!("Timeout waiting for wifi link up")
+    }
+
+    let res = async {
+        while !stack.is_config_up() {
+            Timer::after(Duration::from_millis(100)).await
+        }
+        Ok::<(), FatError>(())
+    }
+    .with_timeout(Duration::from_millis(max_wait as u64 * 1000))
+    .await;
+
+    if res.is_err() {
+        bail!("Timeout waiting for wifi config up")
+    }
+
+    info!("Connected WIFI, dhcp: {:?}", stack.config_v4());
+    Ok(*stack)
+}
+
+pub async fn try_connect_wifi_sntp_mqtt(
+    board: &mut MutexGuard<'static, CriticalSectionRawMutex, HAL<'static>>,
+    stack_store: &mut OptionLock<Stack<'static>>,
+    spawner: Spawner,
+) -> NetworkMode {
+    let nw_conf = &board.board_hal.get_config().network.clone();
+    let esp = board.board_hal.get_esp();
+    let device = match esp.interface_sta.take() {
+        Some(d) => d,
+        None => {
+            info!("Offline mode due to STA interface already taken");
+            board.board_hal.general_fault(true).await;
+            return NetworkMode::OFFLINE;
+        }
+    };
+    match wifi(nw_conf, device, &esp.controller, &mut esp.rng, spawner).await {
+        Ok(stack) => {
+            stack_store.replace(stack);
+
+            let sntp_mode: SntpMode = match sntp(1000 * 10, stack).await {
+                Ok(new_time) => {
+                    info!("Using time from sntp {}", new_time.to_rfc3339());
+                    let _ = board
+                        .board_hal
+                        .get_rtc_module()
+                        .set_rtc_time(&new_time)
+                        .await;
+                    SntpMode::SYNC { current: new_time }
+                }
+                Err(err) => {
+                    warn!("sntp error: {err}");
+                    board.board_hal.general_fault(true).await;
+                    SntpMode::OFFLINE
+                }
+            };
+
+            let mqtt_connected = if board.board_hal.get_config().network.mqtt_url.is_some() {
+                let nw_config = board.board_hal.get_config().network.clone();
+                let nw_config = mk_static!(NetworkConfig, nw_config);
+                match mqtt::mqtt_init(nw_config, stack, spawner).await {
+                    Ok(_) => {
+                        info!("Mqtt connection ready");
+                        true
+                    }
+                    Err(err) => {
+                        warn!("Could not connect mqtt due to {err}");
+                        false
+                    }
+                }
+            } else {
+                false
+            };
+
+            let ip = match stack.config_v4() {
+                Some(config) => config.address.address().to_string(),
+                None => match stack.config_v6() {
+                    Some(config) => config.address.address().to_string(),
+                    None => String::from("No IP"),
+                },
+            };
+            NetworkMode::WIFI {
+                sntp: sntp_mode,
+                mqtt: mqtt_connected,
+                ip_address: ip,
+            }
+        }
+        Err(err) => {
+            info!("Offline mode due to {err}");
+            board.board_hal.general_fault(true).await;
+            NetworkMode::OFFLINE
+        }
+    }
+}

rust/src/util.rs

@@ -0,0 +1,10 @@
+macro_rules! mk_static {
+    ($t:ty,$val:expr) => {{
+        static STATIC_CELL: static_cell::StaticCell<$t> = static_cell::StaticCell::new();
+        #[deny(unused_attributes)]
+        let x = STATIC_CELL.uninit().write(($val));
+        x
+    }};
+}
+
+pub(crate) use mk_static;