remove: eliminate file management and LittleFS-based filesystem, implement savegame management for JSON config slots with wear-leveling

Software/MainBoard/rust/.cargo/config.toml

@@ -23,8 +23,6 @@ target = "riscv32imac-unknown-none-elf"
 CHRONO_TZ_TIMEZONE_FILTER = "UTC|America/New_York|America/Chicago|America/Los_Angeles|Europe/London|Europe/Berlin|Europe/Paris|Asia/Tokyo|Asia/Shanghai|Asia/Kolkata|Australia/Sydney|America/Sao_Paulo|Africa/Johannesburg|Asia/Dubai|Pacific/Auckland"
 CARGO_WORKSPACE_DIR = { value = "", relative = true }
 ESP_LOG = "info"
-PATH = { value = "../../../bin:/usr/bin:/usr/local/bin", force = true, relative = true }
-
 
 
 [unstable]

Software/MainBoard/rust/Cargo.toml

@@ -109,13 +109,12 @@ pca9535 = { version = "2.0.0" }
 ina219 = { version = "0.2.0" }
 
 # Storage and filesystem
-littlefs2 = { version = "0.6.1", features = ["c-stubs", "alloc"] }
-littlefs2-core = "0.1.2"
+embedded-savegame = { version = "0.3.0" }
 
 # Serialization / codecs
 serde = { version = "1.0.228", features = ["derive", "alloc"], default-features = false }
 serde_json = { version = "1.0.145", default-features = false, features = ["alloc"] }
-bincode = { version = "2.0.1", default-features = false, features = ["derive"] }
+bincode = { version = "2.0.1", default-features = false, features = ["derive", "alloc"] }
 
 # Time and time zones
 chrono = { version = "0.4.42", default-features = false, features = ["iana-time-zone", "alloc", "serde"] }
@@ -136,6 +135,7 @@ measurements = "0.11.1"
 
 # Project-specific
 mcutie = { version = "0.3.0", default-features = false, features = ["log", "homeassistant"] }
+no-panic = "0.1.36"
 
 [patch.crates-io]
 mcutie = { git = 'https://github.com/empirephoenix/mcutie.git' }

Software/MainBoard/rust/clippy.toml

@@ -0,0 +1,2 @@
+# This file is used for clippy configuration. 
+# It shouldn't contain the deny attributes, which belong to the crate root.

Software/MainBoard/rust/src/config.rs

@@ -1,17 +1,17 @@
 use crate::hal::PLANT_COUNT;
 use crate::plant_state::PlantWateringMode;
-use alloc::string::String;
-use core::str::FromStr;
+use alloc::string::{String, ToString};
+use bincode::{Decode, Encode};
 use serde::{Deserialize, Serialize};
 
-#[derive(Serialize, Deserialize, Clone, Debug, PartialEq)]
+#[derive(Serialize, Deserialize, Clone, Debug, PartialEq, Encode, Decode)]
 #[serde(default)]
 pub struct NetworkConfig {
-    pub ap_ssid: heapless::String<32>,
-    pub ssid: Option<heapless::String<32>>,
-    pub password: Option<heapless::String<64>>,
+    pub ap_ssid: String,
+    pub ssid: Option<String>,
+    pub password: Option<String>,
     pub mqtt_url: Option<String>,
-    pub base_topic: Option<heapless::String<64>>,
+    pub base_topic: Option<String>,
     pub mqtt_user: Option<String>,
     pub mqtt_password: Option<String>,
     pub max_wait: u32,
@@ -19,7 +19,7 @@ pub struct NetworkConfig {
 impl Default for NetworkConfig {
     fn default() -> Self {
         Self {
-            ap_ssid: heapless::String::from_str("PlantCtrl Init").unwrap(),
+            ap_ssid: "PlantCtrl Init".to_string(),
             ssid: None,
             password: None,
             mqtt_url: None,
@@ -31,7 +31,7 @@ impl Default for NetworkConfig {
     }
 }
 
-#[derive(Serialize, Deserialize, Clone, Debug, PartialEq)]
+#[derive(Serialize, Deserialize, Clone, Debug, PartialEq, Encode, Decode)]
 #[serde(default)]
 pub struct NightLampConfig {
     pub enabled: bool,
@@ -54,7 +54,7 @@ impl Default for NightLampConfig {
     }
 }
 
-#[derive(Serialize, Deserialize, Clone, Debug, PartialEq)]
+#[derive(Serialize, Deserialize, Clone, Debug, PartialEq, Encode, Decode)]
 #[serde(default)]
 pub struct TankConfig {
     pub tank_sensor_enabled: bool,
@@ -79,26 +79,26 @@ impl Default for TankConfig {
     }
 }
 
-#[derive(Serialize, Deserialize, Clone, Debug, PartialEq, Default)]
+#[derive(Serialize, Deserialize, Clone, Debug, PartialEq, Default, Encode, Decode)]
 pub enum BatteryBoardVersion {
     #[default]
     Disabled,
     WchI2cSlave,
 }
-#[derive(Serialize, Deserialize, Clone, Debug, PartialEq, Default)]
+#[derive(Serialize, Deserialize, Clone, Debug, PartialEq, Default, Encode, Decode)]
 pub enum BoardVersion {
     Initial,
     #[default]
     V4,
 }
 
-#[derive(Serialize, Deserialize, Clone, Debug, PartialEq, Default)]
+#[derive(Serialize, Deserialize, Clone, Debug, PartialEq, Default, Encode, Decode)]
 pub struct BoardHardware {
     pub board: BoardVersion,
     pub battery: BatteryBoardVersion,
 }
 
-#[derive(Serialize, Deserialize, Clone, Debug, PartialEq, Default)]
+#[derive(Serialize, Deserialize, Clone, Debug, PartialEq, Default, Encode, Decode)]
 #[serde(default)]
 pub struct PlantControllerConfig {
     pub hardware: BoardHardware,
@@ -109,7 +109,7 @@ pub struct PlantControllerConfig {
     pub timezone: Option<String>,
 }
 
-#[derive(Serialize, Deserialize, Clone, Debug, PartialEq)]
+#[derive(Serialize, Deserialize, Clone, Debug, PartialEq, Encode, Decode)]
 #[serde(default)]
 pub struct PlantConfig {
     pub mode: PlantWateringMode,

Software/MainBoard/rust/src/fat_error.rs

@@ -1,5 +1,7 @@
 use alloc::format;
 use alloc::string::{String, ToString};
+use chrono::format::ParseErrorKind;
+use chrono_tz::ParseError;
 use core::convert::Infallible;
 use core::fmt;
 use core::fmt::Debug;
@@ -14,28 +16,18 @@ use esp_hal::twai::EspTwaiError;
 use esp_radio::wifi::WifiError;
 use ina219::errors::{BusVoltageReadError, ShuntVoltageReadError};
 use lib_bms_protocol::BmsProtocolError;
-use littlefs2_core::PathError;
 use onewire::Error;
 use pca9535::ExpanderError;
 
 //All error superconstruct
 #[derive(Debug)]
 pub enum FatError {
-    BMSError {
-        error: String,
-    },
     OneWireError {
         error: Error<Infallible>,
     },
     String {
         error: String,
     },
-    LittleFSError {
-        error: littlefs2_core::Error,
-    },
-    PathError {
-        error: PathError,
-    },
     TryLockError {
         error: TryLockError,
     },
@@ -86,8 +78,6 @@ impl fmt::Display for FatError {
             }
             FatError::OneWireError { error } => write!(f, "OneWireError {error:?}"),
             FatError::String { error } => write!(f, "{error}"),
-            FatError::LittleFSError { error } => write!(f, "LittleFSError {error:?}"),
-            FatError::PathError { error } => write!(f, "PathError {error:?}"),
             FatError::TryLockError { error } => write!(f, "TryLockError {error:?}"),
             FatError::WifiError { error } => write!(f, "WifiError {error:?}"),
             FatError::SerdeError { error } => write!(f, "SerdeError {error:?}"),
@@ -106,7 +96,6 @@ impl fmt::Display for FatError {
                 write!(f, "CanBusError {error:?}")
             }
             FatError::SNTPError { error } => write!(f, "SNTPError {error:?}"),
-            FatError::BMSError { error } => write!(f, "BMSError, {error}"),
             FatError::OTAError => {
                 write!(f, "OTA missing partition")
             }
@@ -149,23 +138,28 @@ impl<T> ContextExt<T> for Option<T> {
     }
 }
 
+impl<T, E> ContextExt<T> for Result<T, E>
+where
+    E: fmt::Debug,
+{
+    fn context<C>(self, context: C) -> Result<T, FatError>
+    where
+        C: AsRef<str>,
+    {
+        match self {
+            Ok(value) => Ok(value),
+            Err(err) => Err(FatError::String {
+                error: format!("{}: {:?}", context.as_ref(), err),
+            }),
+        }
+    }
+}
+
 impl From<Error<Infallible>> for FatError {
     fn from(error: Error<Infallible>) -> Self {
         FatError::OneWireError { error }
     }
 }
-impl From<littlefs2_core::Error> for FatError {
-    fn from(value: littlefs2_core::Error) -> Self {
-        FatError::LittleFSError { error: value }
-    }
-}
-
-impl From<PathError> for FatError {
-    fn from(value: PathError) -> Self {
-        FatError::PathError { error: value }
-    }
-}
-
 impl From<TryLockError> for FatError {
     fn from(value: TryLockError) -> Self {
         FatError::TryLockError { error: value }
@@ -283,7 +277,7 @@ impl<E: fmt::Debug> From<ShuntVoltageReadError<I2cDeviceError<E>>> for FatError
 
 impl From<Infallible> for FatError {
     fn from(value: Infallible) -> Self {
-        panic!("Infallible error: {:?}", value)
+        match value {}
     }
 }
 
@@ -336,3 +330,27 @@ impl From<BmsProtocolError> for FatError {
         }
     }
 }
+
+impl From<ParseError> for FatError {
+    fn from(value: ParseError) -> Self {
+        FatError::String {
+            error: format!("Parsing error: {value:?}"),
+        }
+    }
+}
+
+impl From<ParseErrorKind> for FatError {
+    fn from(value: ParseErrorKind) -> Self {
+        FatError::String {
+            error: format!("Parsing error: {value:?}"),
+        }
+    }
+}
+
+impl From<chrono::format::ParseError> for FatError {
+    fn from(value: chrono::format::ParseError) -> Self {
+        FatError::String {
+            error: format!("Parsing error: {value:?}"),
+        }
+    }
+}

Software/MainBoard/rust/src/hal/esp.rs

@@ -1,18 +1,16 @@
 use crate::bail;
 use crate::config::{NetworkConfig, PlantControllerConfig};
+use crate::hal::savegame_manager::SavegameManager;
 use crate::hal::{PLANT_COUNT, TIME_ACCESS};
 use crate::log::{LogMessage, LOG_ACCESS};
 use chrono::{DateTime, Utc};
-use serde::Serialize;
 
 use crate::fat_error::{ContextExt, FatError, FatResult};
-use crate::hal::little_fs2storage_adapter::LittleFs2Filesystem;
 use crate::hal::shared_flash::MutexFlashStorage;
 use alloc::string::ToString;
 use alloc::sync::Arc;
 use alloc::{format, string::String, vec, vec::Vec};
 use core::net::{IpAddr, Ipv4Addr, SocketAddr};
-use core::str::FromStr;
 use core::sync::atomic::Ordering;
 use embassy_executor::Spawner;
 use embassy_net::udp::UdpSocket;
@@ -39,8 +37,6 @@ use esp_radio::wifi::{
     AccessPointConfig, AccessPointInfo, AuthMethod, ClientConfig, ModeConfig, ScanConfig,
     ScanTypeConfig, WifiController, WifiDevice, WifiStaState,
 };
-use littlefs2::fs::Filesystem;
-use littlefs2_core::{FileType, PathBuf, SeekFrom};
 use log::{error, info, warn};
 use mcutie::{
     Error, McutieBuilder, McutieReceiver, McutieTask, MqttMessage, PublishDisplay, Publishable,
@@ -60,7 +56,6 @@ static mut LOW_VOLTAGE_DETECTED: i8 = 0;
 #[esp_hal::ram(unstable(rtc_fast), unstable(persistent))]
 static mut RESTART_TO_CONF: i8 = 0;
 
-const CONFIG_FILE: &str = "config.json";
 const NTP_SERVER: &str = "pool.ntp.org";
 
 static MQTT_CONNECTED_EVENT_RECEIVED: AtomicBool = AtomicBool::new(false);
@@ -68,19 +63,6 @@ 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 {
-    filename: String,
-    size: usize,
-}
-
-#[derive(Serialize, Debug)]
-pub struct FileList {
-    total: usize,
-    used: usize,
-    files: Vec<FileInfo>,
-}
-
 #[derive(Copy, Clone, Default)]
 struct Timestamp {
     stamp: DateTime<Utc>,
@@ -117,7 +99,7 @@ impl NtpTimestampGenerator for Timestamp {
 }
 
 pub struct Esp<'a> {
-    pub fs: Arc<Mutex<CriticalSectionRawMutex, Filesystem<'static, LittleFs2Filesystem>>>,
+    pub savegame: SavegameManager,
     pub rng: Rng,
     //first starter (ap or sta will take these)
     pub interface_sta: Option<WifiDevice<'static>>,
@@ -185,69 +167,6 @@ impl Esp<'_> {
             }
         }
     }
-    pub(crate) async fn delete_file(&self, filename: String) -> FatResult<()> {
-        let file = PathBuf::try_from(filename.as_str())?;
-        let access = self.fs.lock().await;
-        access.remove(&file)?;
-        Ok(())
-    }
-    pub(crate) async fn write_file(
-        &mut self,
-        filename: String,
-        offset: u32,
-        buf: &[u8],
-    ) -> Result<(), FatError> {
-        let file = PathBuf::try_from(filename.as_str())?;
-        let access = self.fs.lock().await;
-        access.open_file_with_options_and_then(
-            |options| options.read(true).write(true).create(true),
-            &file,
-            |file| {
-                file.seek(SeekFrom::Start(offset))?;
-                file.write(buf)?;
-                Ok(())
-            },
-        )?;
-        Ok(())
-    }
-
-    pub async fn get_size(&mut self, filename: String) -> FatResult<usize> {
-        let file = PathBuf::try_from(filename.as_str())?;
-        let access = self.fs.lock().await;
-        let data = access.metadata(&file)?;
-        Ok(data.len())
-    }
-    pub(crate) async fn get_file(
-        &mut self,
-        filename: String,
-        chunk: u32,
-    ) -> FatResult<([u8; 512], usize)> {
-        use littlefs2::io::Error as lfs2Error;
-
-        let file = PathBuf::try_from(filename.as_str())?;
-        let access = self.fs.lock().await;
-        let mut buf = [0_u8; 512];
-        let mut read = 0;
-        let offset = chunk * buf.len() as u32;
-        access.open_file_with_options_and_then(
-            |options| options.read(true),
-            &file,
-            |file| {
-                let length = file.len()? as u32;
-                if length == 0 {
-                    Err(lfs2Error::IO)
-                } else if length > offset {
-                    file.seek(SeekFrom::Start(offset))?;
-                    read = file.read(&mut buf)?;
-                    Ok(())
-                } else {
-                    //exactly at end, do nothing
-                    Ok(())
-                }
-            },
-        )?;
-        Ok((buf, read))
-    }
 
     pub(crate) async fn write_ota(&mut self, offset: u32, buf: &[u8]) -> Result<(), FatError> {
         let _ = check_erase(self.ota_target, offset, offset + 4096);
@@ -314,17 +233,19 @@ impl Esp<'_> {
             &mut tx_meta,
             &mut tx_buffer,
         );
-        socket.bind(123).unwrap();
+        socket.bind(123).context("Could not bind UDP socket")?;
 
         let context = NtpContext::new(Timestamp::default());
 
         let ntp_addrs = stack
             .dns_query(NTP_SERVER, DnsQueryType::A)
-            .await;
-        if ntp_addrs.is_err() {
-            bail!("Failed to resolve DNS");
+            .await
+            .context("Failed to resolve DNS")?;
+
+        if ntp_addrs.is_empty() {
+            bail!("No IP addresses found for NTP server");
         }
-        let ntp = ntp_addrs.unwrap()[0];
+        let ntp = ntp_addrs[0];
         info!("NTP server: {ntp:?}");
 
         let mut counter = 0;
@@ -416,9 +337,11 @@ impl Esp<'_> {
             Err(_) => "PlantCtrl Emergency Mode".to_string(),
         };
 
-        let device = self.interface_ap.take().unwrap();
-        let gw_ip_addr_str = "192.168.71.1";
-        let gw_ip_addr = Ipv4Addr::from_str(gw_ip_addr_str).expect("failed to parse gateway ip");
+        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),
@@ -447,7 +370,7 @@ impl Esp<'_> {
         println!("start net task");
         spawner.spawn(net_task(runner)).ok();
         println!("run dhcp");
-        spawner.spawn(run_dhcp(*stack, gw_ip_addr_str)).ok();
+        spawner.spawn(run_dhcp(*stack, gw_ip_addr)).ok();
 
         loop {
             if stack.is_link_up() {
@@ -458,7 +381,7 @@ impl Esp<'_> {
         while !stack.is_config_up() {
             Timer::after(Duration::from_millis(100)).await
         }
-        println!("Connect to the AP `${ssid}` and point your browser to http://{gw_ip_addr_str}/");
+        println!("Connect to the AP `${ssid}` and point your browser to http://{gw_ip_addr}/");
         stack
             .config_v4()
             .inspect(|c| println!("ipv4 config: {c:?}"));
@@ -472,18 +395,17 @@ impl Esp<'_> {
         spawner: Spawner,
     ) -> FatResult<Stack<'static>> {
         esp_radio::wifi_set_log_verbose();
-        let ssid = network_config.ssid.clone();
-        match &ssid {
+        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")
             }
-        }
-        let ssid = ssid.unwrap().to_string();
+        };
         info!("attempting to connect wifi {ssid}");
         let password = match network_config.password {
             Some(ref password) => password.to_string(),
@@ -491,7 +413,10 @@ impl Esp<'_> {
         };
         let max_wait = network_config.max_wait;
 
-        let device = self.interface_sta.take().unwrap();
+        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;
@@ -596,9 +521,9 @@ impl Esp<'_> {
         if let Ok(cur) = self.ota.current_ota_state() {
             if cur == OtaImageState::PendingVerify {
                 info!("Marking OTA image as valid");
-                self.ota
-                    .set_current_ota_state(Valid)
-                    .expect("Could not set image to valid");
+                if let Err(err) = self.ota.set_current_ota_state(Valid) {
+                    error!("Could not set image to valid: {:?}", err);
+                }
             }
         } else {
             info!("No OTA image to mark as valid");
@@ -615,48 +540,46 @@ impl Esp<'_> {
         }
     }
 
+    /// Load the most recently saved config from flash.
     pub(crate) async fn load_config(&mut self) -> FatResult<PlantControllerConfig> {
-        let cfg = PathBuf::try_from(CONFIG_FILE)?;
-        let config_exist = self.fs.lock().await.exists(&cfg);
-        if !config_exist {
-            bail!("No config file stored")
+        match self.savegame.load_latest()? {
+            None => bail!("No config stored"),
+            Some(data) => {
+                let config: PlantControllerConfig = serde_json::from_slice(&data)?;
+                Ok(config)
+            }
         }
-        let data = self.fs.lock().await.read::<4096>(&cfg)?;
-        let config: PlantControllerConfig = serde_json::from_slice(&data)?;
-        Ok(config)
     }
-    pub(crate) async fn save_config(&mut self, config: Vec<u8>) -> FatResult<()> {
-        let filesystem = self.fs.lock().await;
-        let cfg = PathBuf::try_from(CONFIG_FILE)?;
-        filesystem.write(&cfg, &config)?;
+
+    /// Load a config from a specific save slot.
+    pub(crate) async fn load_config_slot(
+        &mut self,
+        idx: usize,
+    ) -> FatResult<String> {
+        match self.savegame.load_slot(idx)? {
+            None => bail!("Slot {idx} is empty or invalid"),
+            Some(data) => {
+                Ok(String::from_utf8_lossy(&*data).to_string())
+            }
+        }
+    }
+
+    /// Persist a JSON config blob to the next wear-leveling slot.
+    pub(crate) async fn save_config(&mut self, mut config: Vec<u8>) -> FatResult<()> {
+        self.savegame.save(config.as_mut_slice())?;
         Ok(())
     }
-    pub(crate) async fn list_files(&self) -> FatResult<FileList> {
-        let path = PathBuf::new();
 
-        let fs = self.fs.lock().await;
-        let free_size = fs.available_space()?;
-        let total_size = fs.total_space();
+    /// Delete a specific save slot by erasing it on flash.
+    pub(crate) async fn delete_save_slot(&mut self, idx: usize) -> FatResult<()> {
+        self.savegame.delete_slot(idx)
+    }
 
-        let mut result = FileList {
-            total: total_size,
-            used: total_size - free_size,
-            files: Vec::new(),
-        };
-
-        fs.read_dir_and_then(&path, |dir| {
-            for entry in dir {
-                let e = entry?;
-                if e.file_type() == FileType::File {
-                    result.files.push(FileInfo {
-                        filename: e.path().to_string(),
-                        size: e.metadata().len(),
-                    });
-                }
-            }
-            Ok(())
-        })?;
-        Ok(result)
+    /// Return metadata about all valid save slots.
+    pub(crate) async fn list_saves(
+        &mut self,
+    ) -> FatResult<alloc::vec::Vec<crate::hal::savegame_manager::SaveInfo>> {
+        self.savegame.list_saves()
     }
 
     pub(crate) async fn init_rtc_deepsleep_memory(
@@ -749,11 +672,11 @@ impl Esp<'_> {
 
         let mut builder: McutieBuilder<'_, String, PublishDisplay<String, &str>, 0> =
             McutieBuilder::new(stack, "plant ctrl", mqtt_url);
-        if network_config.mqtt_user.is_some() && network_config.mqtt_password.is_some() {
-            builder = builder.with_authentication(
-                network_config.mqtt_user.as_ref().unwrap().as_str(),
-                network_config.mqtt_password.as_ref().unwrap().as_str(),
-            );
+        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");
         }
 
@@ -805,11 +728,10 @@ impl Esp<'_> {
             Timer::after(Duration::from_millis(100)).await;
         }
 
-        Topic::General(round_trip_topic.clone())
+        let _ = Topic::General(round_trip_topic.clone())
             .with_display("online_text")
             .publish()
-            .await
-            .unwrap();
+            .await;
 
         let timeout = {
             let guard = TIME_ACCESS.get().await.lock().await;
@@ -961,8 +883,8 @@ async fn net_task(mut runner: Runner<'static, WifiDevice<'static>>) {
 }
 
 #[embassy_executor::task]
-async fn run_dhcp(stack: Stack<'static>, gw_ip_addr: &'static str) {
-    use core::net::{Ipv4Addr, SocketAddrV4};
+async fn run_dhcp(stack: Stack<'static>, ip: Ipv4Addr) {
+    use core::net::SocketAddrV4;
 
     use edge_dhcp::{
         io::{self, DEFAULT_SERVER_PORT},
@@ -971,21 +893,25 @@ async fn run_dhcp(stack: Stack<'static>, gw_ip_addr: &'static str) {
     use edge_nal::UdpBind;
     use edge_nal_embassy::{Udp, UdpBuffers};
 
-    let ip = Ipv4Addr::from_str(gw_ip_addr).expect("dhcp task failed to parse gw ip");
-
     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 = unbound_socket
+    let mut bound_socket = match unbound_socket
         .bind(SocketAddr::V4(SocketAddrV4::new(
             Ipv4Addr::UNSPECIFIED,
             DEFAULT_SERVER_PORT,
         )))
         .await
-        .unwrap();
+    {
+        Ok(s) => s,
+        Err(e) => {
+            error!("dhcp task failed to bind socket: {:?}", e);
+            return;
+        }
+    };
 
     loop {
         _ = io::server::run(

Software/MainBoard/rust/src/hal/little_fs2storage_adapter.rs

@@ -1,88 +0,0 @@
-use crate::hal::shared_flash::MutexFlashStorage;
-use embedded_storage::nor_flash::{check_erase, NorFlash, ReadNorFlash};
-use esp_bootloader_esp_idf::partitions::FlashRegion;
-use littlefs2::consts::U4096 as lfsCache;
-use littlefs2::consts::U512 as lfsLookahead;
-use littlefs2::driver::Storage as lfs2Storage;
-use littlefs2::io::Error as lfs2Error;
-use littlefs2::io::Result as lfs2Result;
-use log::error;
-
-pub struct LittleFs2Filesystem {
-    pub(crate) storage: &'static mut FlashRegion<'static, MutexFlashStorage>,
-}
-
-impl lfs2Storage for LittleFs2Filesystem {
-    const READ_SIZE: usize = 4096;
-    const WRITE_SIZE: usize = 4096;
-    const BLOCK_SIZE: usize = 4096; //usually optimal for flash access
-    const BLOCK_COUNT: usize = 8 * 1000 * 1000 / 4096; //8Mb in 4k blocks + a little space for stupid calculation errors
-    const BLOCK_CYCLES: isize = 100;
-    type CACHE_SIZE = lfsCache;
-    type LOOKAHEAD_SIZE = lfsLookahead;
-
-    fn read(&mut self, off: usize, buf: &mut [u8]) -> lfs2Result<usize> {
-        let read_size: usize = Self::READ_SIZE;
-        if off % read_size != 0 {
-            error!("Littlefs2Filesystem read error: offset not aligned to read size offset: {off} read_size: {read_size}");
-            return Err(lfs2Error::IO);
-        }
-        if buf.len() % read_size != 0 {
-            error!("Littlefs2Filesystem read error: length not aligned to read size length: {} read_size: {}", buf.len(), read_size);
-            return Err(lfs2Error::IO);
-        }
-        match self.storage.read(off as u32, buf) {
-            Ok(..) => Ok(buf.len()),
-            Err(err) => {
-                error!("Littlefs2Filesystem read error: {err:?}");
-                Err(lfs2Error::IO)
-            }
-        }
-    }
-
-    fn write(&mut self, off: usize, data: &[u8]) -> lfs2Result<usize> {
-        let write_size: usize = Self::WRITE_SIZE;
-        if off % write_size != 0 {
-            error!("Littlefs2Filesystem write error: offset not aligned to write size offset: {off} write_size: {write_size}");
-            return Err(lfs2Error::IO);
-        }
-        if data.len() % write_size != 0 {
-            error!("Littlefs2Filesystem write error: length not aligned to write size length: {} write_size: {}", data.len(), write_size);
-            return Err(lfs2Error::IO);
-        }
-        match self.storage.write(off as u32, data) {
-            Ok(..) => Ok(data.len()),
-            Err(err) => {
-                error!("Littlefs2Filesystem write error: {err:?}");
-                Err(lfs2Error::IO)
-            }
-        }
-    }
-
-    fn erase(&mut self, off: usize, len: usize) -> lfs2Result<usize> {
-        let block_size: usize = Self::BLOCK_SIZE;
-        if off % block_size != 0 {
-            error!("Littlefs2Filesystem erase error: offset not aligned to block size offset: {off} block_size: {block_size}");
-            return Err(lfs2Error::IO);
-        }
-        if len % block_size != 0 {
-            error!("Littlefs2Filesystem erase error: length not aligned to block size length: {len} block_size: {block_size}");
-            return Err(lfs2Error::IO);
-        }
-
-        match check_erase(self.storage, off as u32, (off + len) as u32) {
-            Ok(_) => {}
-            Err(err) => {
-                error!("Littlefs2Filesystem check erase error: {err:?}");
-                return Err(lfs2Error::IO);
-            }
-        }
-        match self.storage.erase(off as u32, (off + len) as u32) {
-            Ok(..) => Ok(len),
-            Err(err) => {
-                error!("Littlefs2Filesystem erase error: {err:?}");
-                Err(lfs2Error::IO)
-            }
-        }
-    }
-}

Software/MainBoard/rust/src/hal/mod.rs

@@ -3,14 +3,14 @@ use lib_bms_protocol::BmsReadable;
 pub(crate) mod battery;
 // mod can_api; // replaced by external canapi crate
 pub mod esp;
-mod little_fs2storage_adapter;
+pub(crate) mod savegame_manager;
 pub(crate) mod rtc;
 mod shared_flash;
 mod v4_hal;
 mod water;
 
 use crate::alloc::string::ToString;
-use crate::hal::rtc::{DS3231Module, RTCModuleInteraction};
+use crate::hal::rtc::{BackupHeader, DS3231Module, RTCModuleInteraction};
 use esp_hal::peripherals::Peripherals;
 use esp_hal::peripherals::ADC1;
 use esp_hal::peripherals::GPIO0;
@@ -75,7 +75,7 @@ use measurements::{Current, Voltage};
 
 use crate::fat_error::{ContextExt, FatError, FatResult};
 use crate::hal::battery::WCHI2CSlave;
-use crate::hal::little_fs2storage_adapter::LittleFs2Filesystem;
+use crate::hal::savegame_manager::SavegameManager;
 use crate::hal::water::TankSensor;
 use crate::log::LOG_ACCESS;
 use embassy_sync::mutex::Mutex;
@@ -99,9 +99,7 @@ use esp_hal::uart::Uart;
 use esp_hal::Blocking;
 use esp_radio::{init, Controller};
 use esp_storage::FlashStorage;
-use littlefs2::fs::{Allocation, Filesystem as lfs2Filesystem};
-use littlefs2::object_safe::DynStorage;
-use log::{error, info, warn};
+use log::{info, warn};
 use portable_atomic::AtomicBool;
 use serde::{Deserialize, Serialize};
 use shared_flash::MutexFlashStorage;
@@ -164,6 +162,10 @@ pub trait BoardInteraction<'a> {
     async fn get_mptt_current(&mut self) -> FatResult<Current>;
     async fn can_power(&mut self, state: bool) -> FatResult<()>;
 
+    async fn backup_config(&mut self, config: &PlantControllerConfig) -> FatResult<()>;
+    async fn read_backup(&mut self) -> FatResult<PlantControllerConfig>;
+    async fn backup_info(&mut self) -> FatResult<BackupHeader>;
+
     // Return JSON string with autodetected sensors per plant. Default: not supported.
     async fn detect_sensors(&mut self, _request: Detection) -> FatResult<Detection> {
         bail!("Autodetection is only available on v4 HAL with CAN bus");
@@ -266,12 +268,17 @@ impl PlantHal {
         let rng = Rng::new();
         let esp_wifi_ctrl = &*mk_static!(
             Controller<'static>,
-            init().expect("Could not init wifi controller")
+            init().map_err(|e| FatError::String {
+                error: format!("Could not init wifi controller: {:?}", e)
+            })?
         );
 
         let (controller, interfaces) =
-            esp_radio::wifi::new(esp_wifi_ctrl, peripherals.WIFI, Default::default())
-                .expect("Could not init wifi");
+            esp_radio::wifi::new(esp_wifi_ctrl, peripherals.WIFI, Default::default()).map_err(
+                |e| FatError::String {
+                    error: format!("Could not init wifi: {:?}", e),
+                },
+            )?;
 
         let pcnt_module = Pcnt::new(peripherals.PCNT);
 
@@ -325,7 +332,7 @@ impl PlantHal {
             pt.find_partition(esp_bootloader_esp_idf::partitions::PartitionType::Data(
                 DataPartitionSubType::Ota,
             ))?
-            .expect("No OTA data partition found")
+            .context("No OTA data partition found")?
         );
 
         let ota_data = mk_static!(
@@ -370,32 +377,16 @@ impl PlantHal {
             .find_partition(esp_bootloader_esp_idf::partitions::PartitionType::Data(
                 DataPartitionSubType::LittleFs,
             ))?
-            .expect("Data partition with littlefs not found");
+            .context("Storage data partition not found")?;
         let data_partition = mk_static!(PartitionEntry, data_partition);
 
         let data = mk_static!(
-            FlashRegion<MutexFlashStorage>,
+            FlashRegion<'static, MutexFlashStorage>,
             data_partition.as_embedded_storage(flash_storage_3)
         );
-        let lfs2filesystem = mk_static!(LittleFs2Filesystem, LittleFs2Filesystem { storage: data });
-        let alloc = mk_static!(Allocation<LittleFs2Filesystem>, lfs2Filesystem::allocate());
-        if lfs2filesystem.is_mountable() {
-            info!("Littlefs2 filesystem is mountable");
-        } else {
-            match lfs2filesystem.format() {
-                Ok(..) => {
-                    info!("Littlefs2 filesystem is formatted");
-                }
-                Err(err) => {
-                    error!("Littlefs2 filesystem could not be formatted: {err:?}");
-                }
-            }
-        }
 
-        #[allow(clippy::arc_with_non_send_sync)]
-        let fs = Arc::new(Mutex::new(
-            lfs2Filesystem::mount(alloc, lfs2filesystem).expect("Could not mount lfs2 filesystem"),
-        ));
+        let savegame = SavegameManager::new(data);
+        info!("Savegame storage initialized ({} slots × {} KB)", savegame_manager::SAVEGAME_SLOT_COUNT, savegame_manager::SAVEGAME_SLOT_SIZE / 1024);
 
         let uart0 =
             Uart::new(peripherals.UART0, UartConfig::default()).map_err(|_| FatError::String {
@@ -405,7 +396,7 @@ impl PlantHal {
         let ap = interfaces.ap;
         let sta = interfaces.sta;
         let mut esp = Esp {
-            fs,
+            savegame,
             rng,
             controller: Arc::new(Mutex::new(controller)),
             interface_sta: Some(sta),
@@ -488,7 +479,9 @@ impl PlantHal {
             RefCell<I2c<Blocking>>,
         > = CriticalSectionMutex::new(RefCell::new(i2c));
 
-        I2C_DRIVER.init(i2c_bus).expect("Could not init i2c driver");
+        I2C_DRIVER.init(i2c_bus).map_err(|_| FatError::String {
+            error: "Could not init i2c driver".to_string(),
+        })?;
 
         let i2c_bus = I2C_DRIVER.get().await;
         let rtc_device = I2cDevice::new(i2c_bus);
@@ -650,7 +643,7 @@ pub fn next_partition(current: AppPartitionSubType) -> FatResult<AppPartitionSub
 
 pub async fn esp_time() -> DateTime<Utc> {
     let guard = TIME_ACCESS.get().await.lock().await;
-    DateTime::from_timestamp_micros(guard.current_time_us() as i64).unwrap()
+    DateTime::from_timestamp_micros(guard.current_time_us() as i64).unwrap_or(DateTime::UNIX_EPOCH)
 }
 
 pub async fn esp_set_time(time: DateTime<FixedOffset>) -> FatResult<()> {

Software/MainBoard/rust/src/hal/rtc.rs

@@ -1,8 +1,7 @@
-use crate::fat_error::FatResult;
 use crate::hal::Box;
+use crate::fat_error::FatResult;
 use async_trait::async_trait;
-use bincode::config::Configuration;
-use bincode::{config, Decode, Encode};
+use bincode::{Decode, Encode};
 use chrono::{DateTime, Utc};
 use ds323x::ic::DS3231;
 use ds323x::interface::I2cInterface;
@@ -19,24 +18,21 @@ use esp_hal::Blocking;
 use serde::{Deserialize, Serialize};
 
 pub const X25: crc::Crc<u16> = crc::Crc::<u16>::new(&crc::CRC_16_IBM_SDLC);
-const CONFIG: Configuration = config::standard();
+pub const EEPROM_PAGE: usize = 32;
 //
 #[async_trait(?Send)]
 pub trait RTCModuleInteraction {
-    async fn get_backup_info(&mut self) -> FatResult<BackupHeader>;
-    async fn get_backup_config(&mut self, chunk: usize) -> FatResult<([u8; 32], usize, u16)>;
-    async fn backup_config(&mut self, offset: usize, bytes: &[u8]) -> FatResult<()>;
-    async fn backup_config_finalize(&mut self, crc: u16, length: usize) -> FatResult<()>;
     async fn get_rtc_time(&mut self) -> FatResult<DateTime<Utc>>;
     async fn set_rtc_time(&mut self, time: &DateTime<Utc>) -> FatResult<()>;
+
+    fn write(&mut self, offset: u32, data: &[u8]) -> FatResult<()>;
+    fn read(&mut self, offset:u32, data: &mut [u8]) -> FatResult<()>;
 }
-//
-const BACKUP_HEADER_MAX_SIZE: usize = 64;
 
 #[derive(Serialize, Deserialize, PartialEq, Debug, Default, Encode, Decode)]
 pub struct BackupHeader {
     pub timestamp: i64,
-    crc16: u16,
+    pub(crate) crc16: u16,
     pub size: u16,
 }
 //
@@ -46,7 +42,7 @@ pub struct DS3231Module {
         DS3231,
     >,
 
-    pub(crate) storage: eeprom24x::Storage<
+    pub storage: eeprom24x::Storage<
         I2cDevice<'static, CriticalSectionRawMutex, I2c<'static, Blocking>>,
         B32,
         TwoBytes,
@@ -57,67 +53,6 @@ pub struct DS3231Module {
 
 #[async_trait(?Send)]
 impl RTCModuleInteraction for DS3231Module {
-    async fn get_backup_info(&mut self) -> FatResult<BackupHeader> {
-        let mut header_page_buffer = [0_u8; BACKUP_HEADER_MAX_SIZE];
-
-        self.storage.read(0, &mut header_page_buffer)?;
-
-        let (header, len): (BackupHeader, usize) =
-            bincode::decode_from_slice(&header_page_buffer[..], CONFIG)?;
-
-        log::info!("Raw header is {header_page_buffer:?} with size {len}");
-        Ok(header)
-    }
-
-    async fn get_backup_config(&mut self, chunk: usize) -> FatResult<([u8; 32], usize, u16)> {
-        let mut header_page_buffer = [0_u8; BACKUP_HEADER_MAX_SIZE];
-
-        self.storage.read(0, &mut header_page_buffer)?;
-        let (header, _header_size): (BackupHeader, usize) =
-            bincode::decode_from_slice(&header_page_buffer[..], CONFIG)?;
-
-        let mut buf = [0_u8; 32];
-        let offset = chunk * buf.len() + BACKUP_HEADER_MAX_SIZE;
-
-        let end: usize = header.size as usize + BACKUP_HEADER_MAX_SIZE;
-        let current_end = offset + buf.len();
-        let chunk_size = if current_end > end {
-            end - offset
-        } else {
-            buf.len()
-        };
-        if chunk_size == 0 {
-            Ok((buf, 0, header.crc16))
-        } else {
-            self.storage.read(offset as u32, &mut buf)?;
-            //&buf[..chunk_size];
-            Ok((buf, chunk_size, header.crc16))
-        }
-    }
-    async fn backup_config(&mut self, offset: usize, bytes: &[u8]) -> FatResult<()> {
-        //skip header and write after
-        self.storage
-            .write((BACKUP_HEADER_MAX_SIZE + offset) as u32, bytes)?;
-
-        Ok(())
-    }
-
-    async fn backup_config_finalize(&mut self, crc: u16, length: usize) -> FatResult<()> {
-        let mut header_page_buffer = [0_u8; BACKUP_HEADER_MAX_SIZE];
-
-        let time = self.get_rtc_time().await?.timestamp_millis();
-        let header = BackupHeader {
-            crc16: crc,
-            timestamp: time,
-            size: length as u16,
-        };
-        let config = config::standard();
-        let encoded = bincode::encode_into_slice(&header, &mut header_page_buffer, config)?;
-        log::info!("Raw header is {header_page_buffer:?} with size {encoded}");
-        self.storage.write(0, &header_page_buffer)?;
-        Ok(())
-    }
-
     async fn get_rtc_time(&mut self) -> FatResult<DateTime<Utc>> {
         Ok(self.rtc.datetime()?.and_utc())
     }
@@ -126,4 +61,14 @@ impl RTCModuleInteraction for DS3231Module {
         let naive_time = time.naive_utc();
         Ok(self.rtc.set_datetime(&naive_time)?)
     }
+
+    fn write(&mut self, offset: u32, data: &[u8]) -> FatResult<()> {
+        self.storage.write(offset, data)?;
+        Ok(())
+    }
+
+    fn read(&mut self, offset:u32, data: &mut [u8]) -> FatResult<()> {
+        self.storage.read(offset, data)?;
+        Ok(())
+    }
 }

Software/MainBoard/rust/src/hal/savegame_manager.rs

@@ -0,0 +1,150 @@
+use alloc::vec::Vec;
+use embedded_savegame::storage::{Flash, Storage};
+use embedded_storage::nor_flash::{NorFlash, ReadNorFlash};
+use esp_bootloader_esp_idf::partitions::{FlashRegion, Error as PartitionError};
+use serde::Serialize;
+
+use crate::fat_error::{FatError, FatResult};
+use crate::hal::shared_flash::MutexFlashStorage;
+
+/// Size of each save slot in bytes (16 KB).
+pub const SAVEGAME_SLOT_SIZE: usize = 16384;
+
+/// Number of slots in the 8 MB storage partition.
+pub const SAVEGAME_SLOT_COUNT: usize = 8 * 1024 * 1024 / SAVEGAME_SLOT_SIZE; // 512
+
+/// Metadata about a single existing save slot, returned by [`SavegameManager::list_saves`].
+#[derive(Serialize, Debug, Clone)]
+pub struct SaveInfo {
+    pub idx: usize,
+    pub len: u32,
+}
+
+// ── Flash adapter ──────────────────────────────────────────────────────────────
+
+/// Newtype wrapper around a [`PartitionError`] so we can implement the
+/// [`core::fmt::Debug`] bound required by [`embedded_savegame::storage::Flash`].
+#[derive(Debug)]
+pub struct SavegameFlashError(#[allow(dead_code)] PartitionError);
+
+/// Adapts a `&mut FlashRegion<'static, MutexFlashStorage>` to the
+/// [`embedded_savegame::storage::Flash`] trait.
+///
+/// `erase(addr)` erases exactly one slot (`SAVEGAME_SLOT_SIZE` bytes) starting
+/// at `addr`, which is what embedded-savegame expects for NOR flash.
+pub struct SavegameFlashAdapter<'a> {
+    region: &'a mut FlashRegion<'static, MutexFlashStorage>,
+}
+
+impl Flash for SavegameFlashAdapter<'_> {
+    type Error = SavegameFlashError;
+
+    fn read(&mut self, addr: u32, buf: &mut [u8]) -> Result<(), Self::Error> {
+        ReadNorFlash::read(self.region, addr, buf).map_err(SavegameFlashError)
+    }
+
+    fn write(&mut self, addr: u32, data: &mut [u8]) -> Result<(), Self::Error> {
+        NorFlash::write(self.region, addr, data).map_err(SavegameFlashError)
+    }
+
+    /// Erase one full slot at `addr`.
+    /// embedded-savegame calls this before writing to a slot, so we erase
+    /// the entire `SAVEGAME_SLOT_SIZE` bytes so subsequent writes land on
+    /// pre-erased (0xFF) pages.
+    fn erase(&mut self, addr: u32) -> Result<(), Self::Error> {
+        let end = addr + SAVEGAME_SLOT_SIZE as u32;
+        NorFlash::erase(self.region, addr, end).map_err(SavegameFlashError)
+    }
+}
+
+impl From<SavegameFlashError> for FatError {
+    fn from(e: SavegameFlashError) -> Self {
+        FatError::String {
+            error: alloc::format!("Savegame flash error: {:?}", e),
+        }
+    }
+}
+
+// ── SavegameManager ────────────────────────────────────────────────────────────
+
+/// High-level save-game manager that stores JSON config blobs on the storage
+/// partition using [`embedded_savegame`] for wear leveling and power-fail safety.
+pub struct SavegameManager {
+    region: &'static mut FlashRegion<'static, MutexFlashStorage>,
+}
+
+impl SavegameManager {
+    pub fn new(region: &'static mut FlashRegion<'static, MutexFlashStorage>) -> Self {
+        Self { region }
+    }
+
+    /// Build a short-lived [`Storage`] that borrows our flash region.
+    fn storage(
+        &mut self,
+    ) -> Storage<SavegameFlashAdapter<'_>, SAVEGAME_SLOT_SIZE, SAVEGAME_SLOT_COUNT> {
+        Storage::new(SavegameFlashAdapter {
+            region: &mut *self.region,
+        })
+    }
+
+    /// Persist `data` (JSON bytes) to the next available slot.
+    ///
+    /// `scan()` advances the internal wear-leveling pointer to the latest valid
+    /// slot before `append()` writes to the next free one.
+    pub fn save(&mut self, data: &mut [u8]) -> FatResult<()> {
+        let mut st = self.storage();
+        st.scan()?;
+        st.append(data)?;
+        Ok(())
+    }
+
+    /// Load the most recently saved data.  Returns `None` if no valid save exists.
+    pub fn load_latest(&mut self) -> FatResult<Option<Vec<u8>>> {
+        let mut st = self.storage();
+        let slot = st.scan()?;
+        match slot {
+            None => Ok(None),
+            Some(slot) => {
+                let mut buf = alloc::vec![0u8; SAVEGAME_SLOT_SIZE];
+                match st.read(slot.idx, &mut buf)? {
+                    None => Ok(None),
+                    Some(data) => Ok(Some(data.to_vec())),
+                }
+            }
+        }
+    }
+
+    /// Load a specific save by slot index.  Returns `None` if the slot is
+    /// empty or contains an invalid checksum.
+    pub fn load_slot(&mut self, idx: usize) -> FatResult<Option<Vec<u8>>> {
+        let mut st = self.storage();
+        let mut buf = alloc::vec![0u8; SAVEGAME_SLOT_SIZE];
+        match st.read(idx, &mut buf)? {
+            None => Ok(None),
+            Some(data) => Ok(Some(data.to_vec())),
+        }
+    }
+
+    /// Erase a specific slot by index, effectively deleting it.
+    pub fn delete_slot(&mut self, idx: usize) -> FatResult<()> {
+        let mut st = self.storage();
+        st.erase(idx).map_err(Into::into)
+    }
+
+    /// Iterate all slots and return metadata for every slot that contains a
+    /// valid save, using the Storage read API to avoid assuming internal slot structure.
+    pub fn list_saves(&mut self) -> FatResult<Vec<SaveInfo>> {
+        let mut saves = Vec::new();
+        let mut st = self.storage();
+        let mut buf = alloc::vec![0u8; SAVEGAME_SLOT_SIZE];
+        for idx in 0..SAVEGAME_SLOT_COUNT {
+            if let Some(data) = st.read(idx, &mut buf)? {
+                saves.push(SaveInfo {
+                    idx,
+                    len: data.len() as u32,
+                });
+            }
+        }
+        Ok(saves)
+    }
+}

Software/MainBoard/rust/src/hal/v4_hal.rs

@@ -3,7 +3,7 @@ use crate::config::PlantControllerConfig;
 use crate::fat_error::{ContextExt, FatError, FatResult};
 use crate::hal::battery::BatteryInteraction;
 use crate::hal::esp::{hold_disable, hold_enable, Esp};
-use crate::hal::rtc::RTCModuleInteraction;
+use crate::hal::rtc::{BackupHeader, RTCModuleInteraction, EEPROM_PAGE, X25};
 use crate::hal::water::TankSensor;
 use crate::hal::{
     BoardInteraction, Detection, FreePeripherals, Moistures, Sensor, I2C_DRIVER, PLANT_COUNT,
@@ -13,8 +13,10 @@ use crate::log::{LogMessage, LOG_ACCESS};
 use alloc::boxed::Box;
 use alloc::string::ToString;
 use async_trait::async_trait;
+use bincode::config;
 use canapi::id::{classify, plant_id, MessageKind, IDENTIFY_CMD_OFFSET};
 use canapi::SensorSlot;
+use core::cmp::min;
 use embassy_embedded_hal::shared_bus::blocking::i2c::I2cDevice;
 use embassy_sync::blocking_mutex::raw::CriticalSectionRawMutex;
 use embassy_time::{Duration, Timer, WithTimeout};
@@ -30,8 +32,12 @@ use ina219::SyncIna219;
 use log::{error, info, warn};
 use measurements::Resistance;
 use measurements::{Current, Voltage};
+// use no_panic::no_panic;
 use pca9535::{GPIOBank, Pca9535Immediate, StandardExpanderInterface};
 
+pub const BACKUP_HEADER_MAX_SIZE: usize = 64;
+const CONFIG: config::Configuration = config::standard();
+
 const MPPT_CURRENT_SHUNT_OHMS: f64 = 0.05_f64;
 const TWAI_BAUDRATE: twai::BaudRate = twai::BaudRate::Custom(twai::TimingConfig {
     baud_rate_prescaler: 200, // 40MHz / 200 * 2 = 100 on C6, 100 * 20 = 2000 divisor, 40MHz / 2000 = 20kHz
@@ -334,19 +340,12 @@ impl<'a> BoardInteraction<'a> for V4<'a> {
                 bail!("pump current sensor not available");
             }
             Some(pump_ina) => {
-                let v = pump_ina
-                    .shunt_voltage()
-                    .map_err(|e| FatError::String {
-                        error: alloc::format!("{e:?}"),
-                    })
-                    .map(|v| {
-                        let shunt_voltage =
-                            Voltage::from_microvolts(v.shunt_voltage_uv().abs() as f64);
-                        let shut_value = Resistance::from_ohms(0.05_f64);
-                        let current = shunt_voltage.as_volts() / shut_value.as_ohms();
-                        Current::from_amperes(current)
-                    })?;
-                Ok(v)
+                let raw = pump_ina.shunt_voltage()?;
+                let shunt_voltage =
+                    Voltage::from_microvolts(raw.shunt_voltage_uv().abs() as f64);
+                let shut_value = Resistance::from_ohms(0.05_f64);
+                let current = shunt_voltage.as_volts() / shut_value.as_ohms();
+                Ok(Current::from_amperes(current))
             }
         }
     }
@@ -364,7 +363,7 @@ impl<'a> BoardInteraction<'a> for V4<'a> {
     async fn measure_moisture_hz(&mut self) -> FatResult<Moistures> {
         self.can_power.set_high();
         Timer::after_millis(500).await;
-        let config = self.twai_config.take().expect("twai config not set");
+        let config = self.twai_config.take().context("twai config not set")?;
         let mut twai = config.into_async().start();
 
         if twai.is_bus_off() {
@@ -394,7 +393,7 @@ impl<'a> BoardInteraction<'a> for V4<'a> {
     async fn detect_sensors(&mut self, request: Detection) -> FatResult<Detection> {
         self.can_power.set_high();
         Timer::after_millis(500).await;
-        let config = self.twai_config.take().expect("twai config not set");
+        let config = self.twai_config.take().context("twai config not set")?;
         let mut twai = config.into_async().start();
 
         if twai.is_bus_off() {
@@ -538,6 +537,74 @@ impl<'a> BoardInteraction<'a> for V4<'a> {
         }
         Ok(())
     }
+    async fn backup_config(&mut self, controller_config: &PlantControllerConfig) -> FatResult<()> {
+        let mut buffer: [u8; 4096 - BACKUP_HEADER_MAX_SIZE] = [0; 4096 - BACKUP_HEADER_MAX_SIZE];
+        let length = bincode::encode_into_slice(controller_config, &mut buffer, CONFIG)?;
+        info!("Writing backup config of size {}", length);
+        let mut checksum = X25.digest();
+        checksum.update(&buffer[..length]);
+        let mut header_page_buffer = [0_u8; BACKUP_HEADER_MAX_SIZE];
+
+        let time = self.rtc_module.get_rtc_time().await?.timestamp_millis();
+        let header = BackupHeader {
+            crc16: checksum.finalize(),
+            timestamp: time,
+            size: length as u16,
+        };
+        info!("Header is {:?}", header);
+        bincode::encode_into_slice(&header, &mut header_page_buffer, CONFIG)?;
+        info!("Header is serialized");
+        self.get_rtc_module().write(0, &header_page_buffer)?;
+        info!("Header written");
+        let mut to_write = length;
+        let mut chunk: usize = 0;
+
+        while to_write > 0 {
+            self.progress(chunk as u32).await;
+            let start = chunk * EEPROM_PAGE;
+            let end = start + min(EEPROM_PAGE, to_write);
+            let part = &buffer[start..end];
+            info!(
+                "Writing chunk {} of size {} to offset {}",
+                chunk,
+                part.len(),
+                start
+            );
+            to_write -= part.len();
+            chunk += 1;
+            self.get_rtc_module()
+                .write((BACKUP_HEADER_MAX_SIZE + chunk * EEPROM_PAGE) as u32, part)?;
+        }
+        info!("Backup complete");
+        self.clear_progress().await;
+        Ok(())
+    }
+
+    async fn read_backup(&mut self) -> FatResult<PlantControllerConfig> {
+        let info = self.backup_info().await?;
+        let mut store = alloc::vec![0_u8; info.size as usize];
+        self.rtc_module
+            .read(BACKUP_HEADER_MAX_SIZE as u32, store.as_mut_slice())?;
+        let mut checksum = X25.digest();
+        checksum.update(&store[..]);
+        let crc = checksum.finalize();
+        if crc != info.crc16 {
+            bail!("CRC mismatch in backup data")
+        }
+        let (decoded, _) = bincode::decode_from_slice(&store[..], CONFIG)?;
+        Ok(decoded)
+    }
+
+    async fn backup_info(&mut self) -> FatResult<BackupHeader> {
+        let mut header_page_buffer = [0_u8; BACKUP_HEADER_MAX_SIZE];
+        self.get_rtc_module().read(0, &mut header_page_buffer)?;
+        info!("Read header page");
+        let info: Result<(BackupHeader, usize), bincode::error::DecodeError> =
+            bincode::decode_from_slice(&header_page_buffer[..], CONFIG);
+        info!("decoding header: {:?}", info);
+        let (header, _) = info.context("Could not read backup header")?;
+        Ok(header)
+    }
 }
 
 async fn wait_for_can_measurements(

Software/MainBoard/rust/src/hal/water.rs

@@ -33,7 +33,8 @@ impl<'a> TankSensor<'a> {
         one_wire_pin.apply_output_config(&OutputConfig::default().with_pull(Pull::None));
 
         let mut adc1_config = AdcConfig::new();
-        let tank_pin = adc1_config.enable_pin_with_cal::<_, AdcCalLine<_>>(gpio5, Attenuation::_11dB);
+        let tank_pin =
+            adc1_config.enable_pin_with_cal::<_, AdcCalLine<_>>(gpio5, Attenuation::_11dB);
         let tank_channel = Adc::new(adc1, adc1_config);
 
         let one_wire_bus = OneWire::new(one_wire_pin, false);
@@ -141,12 +142,17 @@ impl<'a> TankSensor<'a> {
             let value = self.tank_channel.read_oneshot(&mut self.tank_pin);
             //force yield
             Timer::after_millis(10).await;
-            *sample = value.unwrap();
+            match value {
+                Ok(v) => *sample = v,
+                Err(e) => {
+                    bail!("ADC Hardware error: {:?}", e);
+                }
+            };
         }
         self.tank_power.set_low();
 
         store.sort();
         let median_mv = store[TANK_MULTI_SAMPLE / 2] as f32;
-        Ok(median_mv/1000.0)
+        Ok(median_mv / 1000.0)
     }
 }

Software/MainBoard/rust/src/log/mod.rs

@@ -97,7 +97,7 @@ pub async fn log(
 impl LogArray {
     pub fn get(&mut self) -> Vec<LogEntry> {
         let head: RangedU8<0, MAX_LOG_ARRAY_INDEX> =
-            RangedU8::new(self.head).unwrap_or(RangedU8::new(0).unwrap());
+            RangedU8::new(self.head).unwrap_or(RangedU8::new_saturating(0));
 
         let mut rv: Vec<LogEntry> = Vec::new();
         let mut index = head.wrapping_sub(1);
@@ -120,7 +120,7 @@ impl LogArray {
         txt_long: &str,
     ) {
         let mut head: RangedU8<0, MAX_LOG_ARRAY_INDEX> =
-            RangedU8::new(self.head).unwrap_or(RangedU8::new(0).unwrap());
+            RangedU8::new(self.head).unwrap_or(RangedU8::new_saturating(0));
 
         let mut txt_short_stack: heapless::String<TXT_SHORT_LENGTH> = heapless::String::new();
         let mut txt_long_stack: heapless::String<TXT_LONG_LENGTH> = heapless::String::new();
@@ -281,6 +281,8 @@ pub enum LogMessage {
     PumpMissingSensorCurrent,
     #[strum(serialize = "MPPT Current sensor could not be reached")]
     MPPTError,
+    #[strum(serialize = "Parsing error reading message")]
+    UnknownMessage,
 }
 
 #[derive(Serialize)]
@@ -301,7 +303,7 @@ impl From<&LogMessage> for MessageTranslation {
 impl LogMessage {
     pub fn log_localisation_config() -> Vec<MessageTranslation> {
         Vec::from_iter((0..LogMessage::len()).map(|i| {
-            let msg_type = LogMessage::from_ordinal(i).unwrap();
+            let msg_type = LogMessage::from_ordinal(i).unwrap_or(LogMessage::UnknownMessage);
             (&msg_type).into()
         }))
     }

Software/MainBoard/rust/src/main.rs

@@ -8,6 +8,7 @@
     reason = "mem::forget is generally not safe to do with esp_hal types, especially those \
     holding buffers for the duration of a data transfer."
 )]
+#![deny(clippy::unwrap_used, clippy::expect_used, clippy::panic)]
 
 //TODO insert version here and read it in other parts, also read this for the ota webview
 esp_bootloader_esp_idf::esp_app_desc!();
@@ -39,7 +40,7 @@ use embassy_net::Stack;
 use embassy_sync::blocking_mutex::raw::CriticalSectionRawMutex;
 use embassy_sync::mutex::{Mutex, MutexGuard};
 use embassy_sync::once_lock::OnceLock;
-use embassy_time::{Duration, Instant, Timer, WithTimeout};
+use embassy_time::{Duration, Instant, Timer};
 use esp_hal::rom::ets_delay_us;
 use esp_hal::system::software_reset;
 use esp_println::{logger, println};
@@ -247,7 +248,7 @@ async fn safe_main(spawner: Spawner) -> FatResult<()> {
         let reboot_now = Arc::new(AtomicBool::new(false));
         println!("starting webserver");
 
-        spawner.spawn(http_server(reboot_now.clone(), stack))?;
+        let _ = http_server(reboot_now.clone(), stack);
         wait_infinity(board, WaitType::MissingConfig, reboot_now.clone()).await;
     }
 
@@ -297,7 +298,9 @@ async fn safe_main(spawner: Spawner) -> FatResult<()> {
 
     if let 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;
+        publish_battery_state(&mut board).await.unwrap_or_else(|e| {
+            error!("Error publishing battery state {e}");
+        });
         let _ = publish_mppt_state(&mut board).await;
     }
 
@@ -326,7 +329,12 @@ async fn safe_main(spawner: Spawner) -> FatResult<()> {
         info!("executing config mode override");
         //config upload will trigger reboot!
         let reboot_now = Arc::new(AtomicBool::new(false));
-        spawner.spawn(http_server(reboot_now.clone(), stack.take().unwrap()))?;
+        let stack_val = stack.take();
+        if let Some(s) = stack_val {
+            spawner.spawn(http_server(reboot_now.clone(), s))?;
+        } else {
+            bail!("Network stack missing, hard abort")
+        }
         wait_infinity(board, WaitType::ConfigButton, reboot_now.clone()).await;
     } else {
         LOG_ACCESS
@@ -406,7 +414,11 @@ async fn safe_main(spawner: Spawner) -> FatResult<()> {
     }
     info!("Water temp is {}", water_temp.as_ref().unwrap_or(&0.));
 
-    publish_tank_state(&mut board, &tank_state, water_temp).await;
+    publish_tank_state(&mut board, &tank_state, water_temp)
+        .await
+        .unwrap_or_else(|e| {
+            error!("Error publishing tank state {e}");
+        });
 
     let moisture = board.board_hal.measure_moisture_hz().await?;
 
@@ -421,7 +433,11 @@ async fn safe_main(spawner: Spawner) -> FatResult<()> {
         PlantState::read_hardware_state(moisture, 7, &mut board).await,
     ];
 
-    publish_plant_states(&mut board, &timezone_time.clone(), &plantstate).await;
+    publish_plant_states(&mut board, &timezone_time.clone(), &plantstate)
+        .await
+        .unwrap_or_else(|e| {
+            error!("Error publishing plant states {e}");
+        });
 
     let pump_required = plantstate
         .iter()
@@ -625,14 +641,18 @@ async fn safe_main(spawner: Spawner) -> FatResult<()> {
 
     if stay_alive {
         let reboot_now = Arc::new(AtomicBool::new(false));
-        let _webserver = http_server(reboot_now.clone(), stack.take().unwrap());
-        wait_infinity(board, WaitType::MqttConfig, reboot_now.clone()).await;
+        if let Some(s) = stack.take() {
+            spawner.spawn(http_server(reboot_now.clone(), s))?;
+            wait_infinity(board, WaitType::MqttConfig, reboot_now.clone()).await;
+        } else {
+            bail!("Network Stack missing, hard abort");
+        }
     } else {
         //TODO wait for all mqtt publishes?
         Timer::after_millis(5000).await;
 
         board.board_hal.get_esp().set_restart_to_conf(false);
-        board
+        let _ = board
             .board_hal
             .deep_sleep(1000 * 1000 * 60 * deep_sleep_duration_minutes as u64)
             .await;
@@ -801,30 +821,29 @@ async fn publish_tank_state(
     board: &mut MutexGuard<'_, CriticalSectionRawMutex, HAL<'static>>,
     tank_state: &TankState,
     water_temp: FatResult<f32>,
-) {
+) -> FatResult<()> {
     let state = serde_json::to_string(
         &tank_state.as_mqtt_info(&board.board_hal.get_config().tank, &water_temp),
-    )
-    .unwrap();
+    )?;
     board
         .board_hal
         .get_esp()
         .mqtt_publish("/water", &state)
         .await;
+    Ok(())
 }
 
 async fn publish_plant_states(
     board: &mut MutexGuard<'_, CriticalSectionRawMutex, HAL<'static>>,
     timezone_time: &DateTime<Tz>,
     plantstate: &[PlantState; 8],
-) {
+) -> FatResult<()> {
     for (plant_id, (plant_state, plant_conf)) in plantstate
         .iter()
         .zip(&board.board_hal.get_config().plants.clone())
         .enumerate()
     {
-        let state =
-            serde_json::to_string(&plant_state.to_mqtt_info(plant_conf, timezone_time)).unwrap();
+        let state = serde_json::to_string(&plant_state.to_mqtt_info(plant_conf, timezone_time))?;
         let plant_topic = format!("/plant{}", plant_id + 1);
         let _ = board
             .board_hal
@@ -832,6 +851,7 @@ async fn publish_plant_states(
             .mqtt_publish(&plant_topic, &state)
             .await;
     }
+    Ok(())
 }
 
 async fn publish_firmware_info(
@@ -907,13 +927,9 @@ async fn try_connect_wifi_sntp_mqtt(
 
             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")
-                        }
-                    }
+                None => match stack.config_v6() {
+                    Some(config) => config.address.address().to_string(),
+                    None => String::from("No IP"),
                 },
             };
             NetworkMode::Wifi {
@@ -987,11 +1003,11 @@ async fn publish_mppt_state(
 
 async fn publish_battery_state(
     board: &mut MutexGuard<'_, CriticalSectionRawMutex, HAL<'static>>,
-) -> () {
+) -> FatResult<()> {
     let state = board.board_hal.get_battery_monitor().get_state().await;
     let value = match state {
         Ok(state) => {
-            let json = serde_json::to_string(&state).unwrap().to_owned();
+            let json = serde_json::to_string(&state)?.to_owned();
             json.to_owned()
         }
         Err(_) => "error".to_owned(),
@@ -1003,6 +1019,7 @@ async fn publish_battery_state(
             .mqtt_publish("/battery", &value)
             .await;
     }
+    Ok(())
 }
 
 async fn wait_infinity(
@@ -1049,8 +1066,7 @@ async fn wait_infinity(
                 exit_hold_blink = !exit_hold_blink;
 
                 let progress = core::cmp::min(elapsed, exit_hold_duration);
-                let lit = ((progress.as_millis() as u64 * 8)
-                    / exit_hold_duration.as_millis() as u64)
+                let lit = ((progress.as_millis() * 8) / exit_hold_duration.as_millis())
                     .saturating_add(1)
                     .min(8) as usize;
 
@@ -1200,6 +1216,8 @@ async fn handle_serial_config(
     }
 }
 
+use embassy_time::WithTimeout;
+#[allow(clippy::panic, clippy::unwrap_used, clippy::expect_used)]
 #[esp_rtos::main]
 async fn main(spawner: Spawner) -> ! {
     // intialize embassy

Software/MainBoard/rust/src/plant_state.rs

@@ -1,3 +1,4 @@
+use bincode::{Decode, Encode};
 use crate::hal::Moistures;
 use crate::{config::PlantConfig, hal::HAL, in_time_range};
 use chrono::{DateTime, TimeDelta, Utc};
@@ -70,7 +71,7 @@ impl PumpState {
     }
 }
 
-#[derive(Serialize, Deserialize, Clone, Copy, Debug, PartialEq)]
+#[derive(Serialize, Deserialize, Clone, Copy, Debug, PartialEq, Encode, Decode)]
 pub enum PlantWateringMode {
     Off,
     TargetMoisture,

Software/MainBoard/rust/src/tank.rs

@@ -158,12 +158,11 @@ pub async fn determine_tank_state(
     board: &mut MutexGuard<'static, CriticalSectionRawMutex, HAL<'static>>,
 ) -> TankState {
     if board.board_hal.get_config().tank.tank_sensor_enabled {
-        match board
-            .board_hal
-            .get_tank_sensor()
-            .map(|f| f.tank_sensor_voltage())
-        {
-            Ok(raw_sensor_value_mv) => TankState::Present(raw_sensor_value_mv.await.unwrap()),
+        match board.board_hal.get_tank_sensor() {
+            Ok(sensor) => match sensor.tank_sensor_voltage().await {
+                Ok(raw_sensor_value_mv) => TankState::Present(raw_sensor_value_mv),
+                Err(err) => TankState::Error(TankError::BoardError(err.to_string())),
+            },
             Err(err) => TankState::Error(TankError::BoardError(err.to_string())),
         }
     } else {

Software/MainBoard/rust/src/webserver/backup_manager.rs

@@ -1,8 +1,7 @@
 use crate::fat_error::{FatError, FatResult};
-use crate::hal::rtc::X25;
+use crate::webserver::read_up_to_bytes_from_request;
 use crate::BOARD_ACCESS;
 use alloc::borrow::ToOwned;
-use alloc::format;
 use alloc::string::{String, ToString};
 use chrono::DateTime;
 use edge_http::io::server::Connection;
@@ -21,48 +20,9 @@ pub(crate) async fn get_backup_config<T, const N: usize>(
 where
     T: Read + Write,
 {
-    // First pass: verify checksum without sending data
-    let mut checksum = X25.digest();
-    let mut chunk = 0_usize;
-    loop {
-        let mut board = BOARD_ACCESS.get().await.lock().await;
-        board.board_hal.progress(chunk as u32).await;
-        let (buf, len, expected_crc) = board
-            .board_hal
-            .get_rtc_module()
-            .get_backup_config(chunk)
-            .await?;
+    let mut board = BOARD_ACCESS.get().await.lock().await;
+    let backup = board.board_hal.read_backup().await?;
 
-        // Update checksum with the actual data bytes of this chunk
-        checksum.update(&buf[..len]);
-
-        let is_last = len == 0 || len < buf.len();
-        if is_last {
-            let actual_crc = checksum.finalize();
-            if actual_crc != expected_crc {
-                BOARD_ACCESS
-                    .get()
-                    .await
-                    .lock()
-                    .await
-                    .board_hal
-                    .clear_progress()
-                    .await;
-                conn.initiate_response(
-                    409,
-                    Some(
-                        format!("Checksum mismatch expected {expected_crc} got {actual_crc}")
-                            .as_str(),
-                    ),
-                    &[],
-                )
-                .await?;
-                return Ok(Some(409));
-            }
-            break;
-        }
-        chunk += 1;
-    }
     // Second pass: stream data
     conn.initiate_response(
         200,
@@ -75,35 +35,8 @@ where
     )
     .await?;
 
-    let mut chunk = 0_usize;
-    loop {
-        let mut board = BOARD_ACCESS.get().await.lock().await;
-        board.board_hal.progress(chunk as u32).await;
-        let (buf, len, _expected_crc) = board
-            .board_hal
-            .get_rtc_module()
-            .get_backup_config(chunk)
-            .await?;
-
-        if len == 0 {
-            break;
-        }
-
-        conn.write_all(&buf[..len]).await?;
-
-        if len < buf.len() {
-            break;
-        }
-        chunk += 1;
-    }
-    BOARD_ACCESS
-        .get()
-        .await
-        .lock()
-        .await
-        .board_hal
-        .clear_progress()
-        .await;
+    conn.write_all(serde_json::to_string(&backup)?.as_bytes())
+        .await?;
     Ok(Some(200))
 }
 
@@ -113,49 +46,12 @@ pub(crate) async fn backup_config<T, const N: usize>(
 where
     T: Read + Write,
 {
-    let mut offset = 0_usize;
-    let mut buf = [0_u8; 32];
-
-    let mut checksum = X25.digest();
-
-    let mut counter = 0;
-    loop {
-        let to_write = conn.read(&mut buf).await?;
-        if to_write == 0 {
-            info!("backup finished");
-            break;
-        } else {
-            let mut board = BOARD_ACCESS.get().await.lock().await;
-            board.board_hal.progress(counter).await;
-
-            counter += 1;
-            board
-                .board_hal
-                .get_rtc_module()
-                .backup_config(offset, &buf[0..to_write])
-                .await?;
-            checksum.update(&buf[0..to_write]);
-        }
-        offset += to_write;
-    }
-
+    let input = read_up_to_bytes_from_request(conn, Some(4096)).await?;
+    info!("Read input with length {}", input.len());
     let mut board = BOARD_ACCESS.get().await.lock().await;
-    board
-        .board_hal
-        .get_rtc_module()
-        .backup_config_finalize(checksum.finalize(), offset)
-        .await?;
-    board.board_hal.clear_progress().await;
-    conn.initiate_response(
-        200,
-        Some("OK"),
-        &[
-            ("Access-Control-Allow-Origin", "*"),
-            ("Access-Control-Allow-Headers", "*"),
-            ("Access-Control-Allow-Methods", "*"),
-        ],
-    )
-    .await?;
+    let config_to_backup = serde_json::from_slice(&input)?;
+    info!("Parsed send config to object");
+    board.board_hal.backup_config(&config_to_backup).await?;
     Ok(Some("saved".to_owned()))
 }
 
@@ -166,10 +62,12 @@ where
     T: Read + Write,
 {
     let mut board = BOARD_ACCESS.get().await.lock().await;
-    let header = board.board_hal.get_rtc_module().get_backup_info().await;
-    let json = match header {
+    let info = board.board_hal.backup_info().await;
+
+    let json = match info {
         Ok(h) => {
-            let timestamp = DateTime::from_timestamp_millis(h.timestamp).unwrap();
+            info!("Got backup info: {:?}", h);
+            let timestamp = DateTime::from_timestamp_millis(h.timestamp).unwrap_or_default();
             let wbh = WebBackupHeader {
                 timestamp: timestamp.to_rfc3339(),
                 size: h.size,
@@ -177,6 +75,7 @@ where
             serde_json::to_string(&wbh)?
         }
         Err(err) => {
+            info!("Error getting backup info: {:?}", err);
             let wbh = WebBackupHeader {
                 timestamp: err.to_string(),
                 size: 0,

Software/MainBoard/rust/src/webserver/file_manager.rs

@@ -1,160 +0,0 @@
-use crate::fat_error::{FatError, FatResult};
-use crate::webserver::read_up_to_bytes_from_request;
-use crate::BOARD_ACCESS;
-use alloc::borrow::ToOwned;
-use alloc::format;
-use alloc::string::String;
-use edge_http::io::server::Connection;
-use edge_http::Method;
-use edge_nal::io::{Read, Write};
-use log::info;
-
-pub(crate) async fn list_files<T, const N: usize>(
-    _request: &mut Connection<'_, T, N>,
-) -> FatResult<Option<String>> {
-    let mut board = BOARD_ACCESS.get().await.lock().await;
-    let result = board.board_hal.get_esp().list_files().await?;
-    let file_list_json = serde_json::to_string(&result)?;
-    Ok(Some(file_list_json))
-}
-pub(crate) async fn file_operations<T, const N: usize>(
-    conn: &mut Connection<'_, T, { N }>,
-    method: Method,
-    path: &&str,
-    prefix: &&str,
-) -> Result<Option<u32>, FatError>
-where
-    T: Read + Write,
-{
-    let filename = &path[prefix.len()..];
-    info!("file request for {filename} with method {method}");
-    Ok(match method {
-        Method::Delete => {
-            let mut board = BOARD_ACCESS.get().await.lock().await;
-            board
-                .board_hal
-                .get_esp()
-                .delete_file(filename.to_owned())
-                .await?;
-            conn.initiate_response(
-                200,
-                Some("OK"),
-                &[
-                    ("Access-Control-Allow-Origin", "*"),
-                    ("Access-Control-Allow-Headers", "*"),
-                    ("Access-Control-Allow-Methods", "*"),
-                ],
-            )
-            .await?;
-            Some(200)
-        }
-        Method::Get => {
-            let disposition = format!("attachment; filename=\"{filename}\"");
-            let size = {
-                let mut board = BOARD_ACCESS.get().await.lock().await;
-                board
-                    .board_hal
-                    .get_esp()
-                    .get_size(filename.to_owned())
-                    .await?
-            };
-
-            conn.initiate_response(
-                200,
-                Some("OK"),
-                &[
-                    ("Content-Type", "application/octet-stream"),
-                    ("Content-Disposition", disposition.as_str()),
-                    ("Content-Length", &format!("{size}")),
-                    ("Access-Control-Allow-Origin", "*"),
-                    ("Access-Control-Allow-Headers", "*"),
-                    ("Access-Control-Allow-Methods", "*"),
-                ],
-            )
-            .await?;
-
-            let mut chunk = 0;
-            loop {
-                let mut board = BOARD_ACCESS.get().await.lock().await;
-                board.board_hal.progress(chunk).await;
-                let read_chunk = board
-                    .board_hal
-                    .get_esp()
-                    .get_file(filename.to_owned(), chunk)
-                    .await?;
-                let length = read_chunk.1;
-                if length == 0 {
-                    info!("file request for {filename} finished");
-                    break;
-                }
-                let data = &read_chunk.0[0..length];
-                conn.write_all(data).await?;
-                if length < read_chunk.0.len() {
-                    info!("file request for {filename} finished");
-                    break;
-                }
-                chunk += 1;
-            }
-            BOARD_ACCESS
-                .get()
-                .await
-                .lock()
-                .await
-                .board_hal
-                .clear_progress()
-                .await;
-            Some(200)
-        }
-        Method::Post => {
-            {
-                let mut board = BOARD_ACCESS.get().await.lock().await;
-                //ensure the file is deleted first; otherwise we would need to truncate the file which will not work with streaming
-                let _ = board
-                    .board_hal
-                    .get_esp()
-                    .delete_file(filename.to_owned())
-                    .await;
-            }
-
-            let mut offset = 0_usize;
-            let mut chunk = 0;
-            loop {
-                let buf = read_up_to_bytes_from_request(conn, Some(4096)).await?;
-                if buf.is_empty() {
-                    info!("file request for {filename} finished");
-                    break;
-                } else {
-                    let mut board = BOARD_ACCESS.get().await.lock().await;
-                    board.board_hal.progress(chunk as u32).await;
-                    board
-                        .board_hal
-                        .get_esp()
-                        .write_file(filename.to_owned(), offset as u32, &buf)
-                        .await?;
-                }
-                offset += buf.len();
-                chunk += 1;
-            }
-            BOARD_ACCESS
-                .get()
-                .await
-                .lock()
-                .await
-                .board_hal
-                .clear_progress()
-                .await;
-            conn.initiate_response(
-                200,
-                Some("OK"),
-                &[
-                    ("Access-Control-Allow-Origin", "*"),
-                    ("Access-Control-Allow-Headers", "*"),
-                    ("Access-Control-Allow-Methods", "*"),
-                ],
-            )
-            .await?;
-            Some(200)
-        }
-        _ => None,
-    })
-}

Software/MainBoard/rust/src/webserver/get_json.rs

@@ -114,12 +114,39 @@ pub(crate) async fn get_version_web<T, const N: usize>(
     Ok(Some(serde_json::to_string(&get_version(&mut board).await)?))
 }
 
+/// Return the current in-memory config, or — when `saveidx` is `Some(idx)` —
+/// the JSON stored in save slot `idx`.
 pub(crate) async fn get_config<T, const N: usize>(
     _request: &mut Connection<'_, T, N>,
+    saveidx: Option<usize>,
+) -> FatResult<Option<String>> {
+    let mut board = BOARD_ACCESS.get().await.lock().await;
+    let json = match saveidx {
+        None => serde_json::to_string(board.board_hal.get_config())?,
+        Some(idx) => {
+             board.board_hal.get_esp().load_config_slot(idx).await?
+        }
+    };
+    Ok(Some(json))
+}
+
+/// Return a JSON array describing every valid save slot on flash.
+pub(crate) async fn list_saves<T, const N: usize>(
+    _request: &mut Connection<'_, T, N>,
 ) -> FatResult<Option<String>> {
     let mut board = BOARD_ACCESS.get().await.lock().await;
-    let json = serde_json::to_string(&board.board_hal.get_config())?;
-    Ok(Some(json))
+    let saves = board.board_hal.get_esp().list_saves().await?;
+    Ok(Some(serde_json::to_string(&saves)?))
+}
+
+/// Erase (delete) a single save slot by index.
+pub(crate) async fn delete_save<T, const N: usize>(
+    _request: &mut Connection<'_, T, N>,
+    idx: usize,
+) -> FatResult<Option<String>> {
+    let mut board = BOARD_ACCESS.get().await.lock().await;
+    board.board_hal.get_esp().delete_save_slot(idx).await?;
+    Ok(None)
 }
 
 pub(crate) async fn get_battery_state<T, const N: usize>(

Software/MainBoard/rust/src/webserver/mod.rs

@@ -1,7 +1,6 @@
 //offer ota and config mode
 
 mod backup_manager;
-mod file_manager;
 mod get_json;
 mod get_log;
 mod get_static;
@@ -10,10 +9,9 @@ mod post_json;
 
 use crate::fat_error::{FatError, FatResult};
 use crate::webserver::backup_manager::{backup_config, backup_info, get_backup_config};
-use crate::webserver::file_manager::{file_operations, list_files};
 use crate::webserver::get_json::{
     get_battery_state, get_config, get_live_moisture, get_log_localization_config, get_solar_state,
-    get_time, get_timezones, get_version_web, tank_info,
+    delete_save, get_time, get_timezones, get_version_web, list_saves, tank_info,
 };
 use crate::webserver::get_log::get_log;
 use crate::webserver::get_static::{serve_bundle, serve_favicon, serve_index};
@@ -60,10 +58,7 @@ impl Handler for HTTPRequestRouter {
         let method = headers.method;
         let path = headers.path;
 
-        let prefix = "/file?filename=";
-        let status = if path.starts_with(prefix) {
-            file_operations(conn, method, &path, &prefix).await?
-        } else if path == "/ota" {
+        let status = if path == "/ota" {
             ota_operations(conn, method).await.map_err(|e| {
                 error!("Error handling ota: {e}");
                 e
@@ -82,13 +77,20 @@ impl Handler for HTTPRequestRouter {
                             "/time" => Some(get_time(conn).await),
                             "/battery" => Some(get_battery_state(conn).await),
                             "/solar" => Some(get_solar_state(conn).await),
-                            "/get_config" => Some(get_config(conn).await),
-                            "/files" => Some(list_files(conn).await),
                             "/log_localization" => Some(get_log_localization_config(conn).await),
                             "/tank" => Some(tank_info(conn).await),
                             "/backup_info" => Some(backup_info(conn).await),
                             "/timezones" => Some(get_timezones().await),
                             "/moisture" => Some(get_live_moisture(conn).await),
+                            "/list_saves" => Some(list_saves(conn).await),
+                            // /get_config accepts an optional ?saveidx=N query parameter
+                            p if p == "/get_config" || p.starts_with("/get_config?") => {
+                                let saveidx: Option<usize> = p
+                                    .find("saveidx=")
+                                    .and_then(|pos| p[pos + 8..].split('&').next())
+                                    .and_then(|s| s.parse().ok());
+                                Some(get_config(conn, saveidx).await)
+                            }
                             _ => None,
                         };
                         match json {
@@ -127,7 +129,26 @@ impl Handler for HTTPRequestRouter {
                         Some(json) => Some(handle_json(conn, json).await?),
                     }
                 }
-                Method::Options | Method::Delete | Method::Head | Method::Put => None,
+                Method::Delete => {
+                    // DELETE /delete_save?idx=N
+                    let json = if path == "/delete_save" || path.starts_with("/delete_save?") {
+                        let idx: Option<usize> = path
+                            .find("idx=")
+                            .and_then(|pos| path[pos + 4..].split('&').next())
+                            .and_then(|s| s.parse().ok());
+                        match idx {
+                            Some(idx) => Some(delete_save(conn, idx).await),
+                            None => Some(Err(FatError::String { error: "missing idx parameter".into() })),
+                        }
+                    } else {
+                        None
+                    };
+                    match json {
+                        None => None,
+                        Some(json) => Some(handle_json(conn, json).await?),
+                    }
+                }
+                Method::Options | Method::Head | Method::Put => None,
                 _ => None,
             }
         };
@@ -181,6 +202,7 @@ where
 }
 
 #[embassy_executor::task]
+#[allow(clippy::panic, clippy::unwrap_used, clippy::expect_used)]
 pub async fn http_server(reboot_now: Arc<AtomicBool>, stack: Stack<'static>) {
     let buffer: TcpBuffers<2, 1024, 1024> = TcpBuffers::new();
     let tcp = Tcp::new(stack, &buffer);

Software/MainBoard/rust/src/webserver/post_json.rs

@@ -108,7 +108,7 @@ where
 {
     let actual_data = read_up_to_bytes_from_request(request, None).await?;
     let time: SetTime = serde_json::from_slice(&actual_data)?;
-    let parsed = DateTime::parse_from_rfc3339(time.time).unwrap();
+    let parsed = DateTime::parse_from_rfc3339(time.time)?;
     esp_set_time(parsed).await?;
     Ok(None)
 }

Software/MainBoard/rust/src_webpack/src/api.ts

@@ -34,6 +34,11 @@ export interface NetworkConfig {
     max_wait: number
 }
 
+export interface SaveInfo {
+    idx: number,
+    len: number,
+}
+
 export interface FileList {
     total: number,
     used: number,

Software/MainBoard/rust/src_webpack/src/fileview.html

@@ -29,44 +29,10 @@
   }
 </style>
 
-<div class="subtitle">Files:</div>
-<div class="flexcontainer">
-  <div class="filekey">Total Size</div>
-  <div id="filetotalsize" class="filevalue"></div>
-</div>
-<div class="flexcontainer">
-  <div class="filekey">Used Size</div>
-  <div id="fileusedsize" class="filevalue"></div>
-</div>
-<div class="flexcontainer">
-  <div class="filekey">Free Size</div>
-  <div id="filefreesize" class="filevalue"></div>
-</div>
-<br>
-
-<div class="flexcontainer"  style="border-left-style: double; border-right-style: double; border-top-style: double;">
-  <div class="subtitle" >Upload:</div>
-</div>
-<div class="flexcontainer" style="border-left-style: double; border-right-style: double;">
-  <div class="flexcontainer">
-    <div class="filekey">
-      File:
-    </div>
-    <input id="fileuploadfile" class="filevalue" type="file">
-  </div>
-  <div class="flexcontainer">
-    <div class="filekey">
-      Name:
-    </div>
-    <input id="fileuploadname" class="filevalue" type="text">
-  </div>
-</div>
-<div class="flexcontainer" style="border-left-style: double; border-right-style: double; border-bottom-style: double;">
-  <button id="fileuploadbtn" class="subtitle">Upload</button>
-</div>
+<div class="subtitle">Save Slots:</div>
 <br>
 <div class="flexcontainer" style="border-left-style: double; border-right-style: double; border-top-style: double;">
   <div class="subtitle">List:</div>
 </div>
 <div id="fileList" class="flexcontainer" style="border-left-style: double; border-right-style: double; border-bottom-style: double;">
-</div>
+</div>

Software/MainBoard/rust/src_webpack/src/fileview.ts

@@ -1,96 +1,49 @@
 import {Controller} from "./main";
-import {FileInfo, FileList} from "./api";
-const regex = /[^a-zA-Z0-9_.]/g;
-
-function sanitize(str:string){
-  return str.replaceAll(regex, '_')
-} 
+import {SaveInfo} from "./api";
 
 export class FileView {
   readonly fileListView: HTMLElement;
   readonly controller: Controller;
-  readonly filefreesize: HTMLElement;
-  readonly filetotalsize: HTMLElement;
-  readonly fileusedsize: HTMLElement;
 
   constructor(controller: Controller) {
     (document.getElementById("fileview") as HTMLElement).innerHTML = require('./fileview.html') as string;
-    this.fileListView = document.getElementById("fileList") as HTMLElement
-    this.filefreesize = document.getElementById("filefreesize") as HTMLElement
-    this.filetotalsize = document.getElementById("filetotalsize") as HTMLElement
-    this.fileusedsize = document.getElementById("fileusedsize") as HTMLElement
-
-    let fileuploadfile = document.getElementById("fileuploadfile") as HTMLInputElement
-    let fileuploadname = document.getElementById("fileuploadname") as HTMLInputElement
-    let fileuploadbtn = document.getElementById("fileuploadbtn") as HTMLInputElement
-    fileuploadfile.onchange = () => {
-      const selectedFile = fileuploadfile.files?.[0];
-      if (selectedFile == null) {
-        //TODO error dialog here
-        return
-      }
-      
-      fileuploadname.value = sanitize(selectedFile.name)
-    };
-
-    fileuploadname.onchange = () => {
-      let input = fileuploadname.value
-      let clean = sanitize(fileuploadname.value)
-      if (input != clean){
-        fileuploadname.value = clean
-      }
-    }
-
-    fileuploadbtn.onclick = () => {
-      const selectedFile = fileuploadfile.files?.[0];
-      if (selectedFile == null) {
-        //TODO error dialog here
-        return
-      }
-      controller.uploadFile(selectedFile, selectedFile.name)
-    }
-
-
-
+    this.fileListView = document.getElementById("fileList") as HTMLElement;
     this.controller = controller;
   }
 
-  setFileList(fileList: FileList, public_url: string) {
-    this.filetotalsize.innerText = Math.floor(fileList.total / 1024) + "kB"
-    this.fileusedsize.innerText = Math.ceil(fileList.used / 1024) + "kB"
-    this.filefreesize.innerText = Math.ceil((fileList.total - fileList.used) / 1024) + "kB"
+  setSaveList(saves: SaveInfo[], public_url: string) {
+    // Sort newest first (highest index = most recently written slot)
+    const sorted = saves.slice().sort((a, b) => b.idx - a.idx);
 
-    //fast clear
-    this.fileListView.textContent = ""
-    for (let i = 0; i < fileList.files.length; i++) {
-      let file = fileList.files[i]
-      new FileEntry(this.controller, i, file, this.fileListView, public_url);
+    this.fileListView.textContent = "";
+    for (let i = 0; i < sorted.length; i++) {
+      new SaveEntry(this.controller, i, sorted[i], this.fileListView, public_url);
     }
   }
 }
 
-class FileEntry {
+class SaveEntry {
   view: HTMLElement;
-  constructor(controller: Controller, fileid: number, fileinfo: FileInfo, parent: HTMLElement, public_url: string) {
-    this.view = document.createElement("div") as HTMLElement
-    parent.appendChild(this.view)
-    this.view.classList.add("fileentryouter")
+  constructor(controller: Controller, fileid: number, saveinfo: SaveInfo, parent: HTMLElement, public_url: string) {
+    this.view = document.createElement("div") as HTMLElement;
+    parent.appendChild(this.view);
+    this.view.classList.add("fileentryouter");
 
     const template = require('./fileviewentry.html') as string;
-    this.view.innerHTML = template.replaceAll("${fileid}", String(fileid))
+    this.view.innerHTML = template.replaceAll("${fileid}", String(fileid));
 
     let name = document.getElementById("file_" + fileid + "_name") as HTMLElement;
     let size = document.getElementById("file_" + fileid + "_size") as HTMLElement;
     let deleteBtn = document.getElementById("file_" + fileid + "_delete") as HTMLButtonElement;
     deleteBtn.onclick = () => {
-      controller.deleteFile(fileinfo.filename);
-    }
+      controller.deleteSlot(saveinfo.idx);
+    };
 
     let downloadBtn = document.getElementById("file_" + fileid + "_download") as HTMLAnchorElement;
-    downloadBtn.href = public_url + "/file?filename=" + fileinfo.filename
-    downloadBtn.download = fileinfo.filename
+    downloadBtn.href = public_url + "/get_config?saveidx=" + saveinfo.idx;
+    downloadBtn.download = "config_slot_" + saveinfo.idx + ".json";
 
-    name.innerText = fileinfo.filename;
-    size.innerText = fileinfo.size.toString()
+    name.innerText = "Slot " + saveinfo.idx;
+    size.innerText = saveinfo.len + " bytes";
   }
-}
+}

Software/MainBoard/rust/src_webpack/src/fileviewentry.html

@@ -1,11 +1,12 @@
 <div class="flexcontainer">
-    <div id="file_${fileid}_name" class="filetitle">Name</div>
+    <div id="file_${fileid}_name" class="filetitle">Slot</div>
 </div>
 
 <div class="flexcontainer">
     <div class="filekey">Size</div>
-    <div id = "file_${fileid}_size" class="filevalue"></div>
-    <a id = "file_${fileid}_download" class="filevalue" target="_blank">Download</a>
-    <button id = "file_${fileid}_delete" class="filevalue">Delete</button>
+    <div id="file_${fileid}_size" class="filevalue"></div>
+    <a id="file_${fileid}_download" class="filevalue" target="_blank">Download</a>
+    <button id="file_${fileid}_delete" class="filevalue">Delete</button>
 </div>
 
+

Software/MainBoard/rust/src_webpack/src/main.ts

@@ -29,7 +29,7 @@ import {
     SetTime, SSIDList, TankInfo,
     TestPump,
     VersionInfo,
-    FileList, SolarState, PumpTestResult, Detection, CanPower
+    SaveInfo, SolarState, PumpTestResult, Detection, CanPower
 } from "./api";
 import {SolarView} from "./solarview";
 import {toast} from "./toast";
@@ -93,65 +93,36 @@ export class Controller {
         }
     }
 
-    async updateFileList(): Promise<void> {
+    async updateSaveList(): Promise<void> {
         try {
-            const response = await fetch(PUBLIC_URL + "/files");
+            const response = await fetch(PUBLIC_URL + "/list_saves");
             const json = await response.json();
-            const filelist = json as FileList;
-            controller.fileview.setFileList(filelist, PUBLIC_URL);
+            const saves = json as SaveInfo[];
+            controller.fileview.setSaveList(saves, PUBLIC_URL);
         } catch (error) {
             console.log(error);
         }
     }
 
-    uploadFile(file: File, name: string) {
-        let current = 0;
-        let max = 100;
-        controller.progressview.addProgress("file_upload", (current / max) * 100, "Uploading File " + name + "(" + current + "/" + max + ")")
+    deleteSlot(idx: number) {
+        controller.progressview.addIndeterminate("slot_delete", "Deleting slot " + idx);
         const ajax = new XMLHttpRequest();
-        ajax.upload.addEventListener("progress", event => {
-            current = event.loaded / 1000;
-            max = event.total / 1000;
-            controller.progressview.addProgress("file_upload", (current / max) * 100, "Uploading File " + name + "(" + current + "/" + max + ")")
-        }, false);
-        ajax.addEventListener("load", () => {
-            controller.progressview.removeProgress("file_upload")
-            controller.updateFileList()
-        }, false);
-        ajax.addEventListener("error", () => {
-            alert("Error upload")
-            controller.progressview.removeProgress("file_upload")
-            controller.updateFileList()
-        }, false);
-        ajax.addEventListener("abort", () => {
-            alert("abort upload")
-            controller.progressview.removeProgress("file_upload")
-            controller.updateFileList()
-        }, false);
-        ajax.open("POST", PUBLIC_URL + "/file?filename=" + name);
-        ajax.send(file);
-    }
-
-    deleteFile(name: string) {
-        controller.progressview.addIndeterminate("file_delete", "Deleting " + name);
-        const ajax = new XMLHttpRequest();
-        ajax.open("DELETE", PUBLIC_URL + "/file?filename=" + name);
+        ajax.open("DELETE", PUBLIC_URL + "/delete_save?idx=" + idx);
         ajax.send();
         ajax.addEventListener("error", () => {
-            controller.progressview.removeProgress("file_delete")
-            alert("Error delete")
-            controller.updateFileList()
+            controller.progressview.removeProgress("slot_delete");
+            alert("Error deleting slot");
+            controller.updateSaveList();
         }, false);
         ajax.addEventListener("abort", () => {
-            controller.progressview.removeProgress("file_delete")
-            alert("Error upload")
-            controller.updateFileList()
+            controller.progressview.removeProgress("slot_delete");
+            alert("Aborted deleting slot");
+            controller.updateSaveList();
         }, false);
         ajax.addEventListener("load", () => {
-            controller.progressview.removeProgress("file_delete")
-            controller.updateFileList()
+            controller.progressview.removeProgress("slot_delete");
+            controller.updateSaveList();
         }, false);
-        controller.updateFileList()
     }
 
     async updateRTCData(): Promise<void> {
@@ -668,7 +639,7 @@ const tasks = [
     {task: controller.updateSolarData, displayString: "Updating Solar Data"},
     {task: controller.downloadConfig, displayString: "Downloading Configuration"},
     {task: controller.version, displayString: "Fetching Version Information"},
-    {task: controller.updateFileList, displayString: "Updating File List"},
+    {task: controller.updateSaveList, displayString: "Updating Save Slots"},
     {task: controller.getBackupInfo, displayString: "Fetching Backup Information"},
     {task: controller.loadLogLocaleConfig, displayString: "Loading Log Localization Config"},
     {task: controller.loadTankInfo, displayString: "Loading Tank Information"},