Add save timestamp support and log interceptor for enhanced debugging

- Introduced `created_at` metadata for saves, enabling timestamp tracking.
- Added `InterceptorLogger` to capture logs, aiding in error diagnostics.
- Updated web UI to display save creation timestamps.
- Improved save/load functionality to maintain compatibility with older formats.

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

@@ -570,7 +570,8 @@ impl Esp<'_> {
 
     /// 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())?;
+        let timestamp = self.get_time().to_rfc3339();
+        self.savegame.save(config.as_mut_slice(), &timestamp)?;
         Ok(())
     }
 

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

@@ -1,8 +1,8 @@
 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 esp_bootloader_esp_idf::partitions::{Error as PartitionError, FlashRegion};
-use serde::Serialize;
+use serde::{Deserialize, Serialize};
 
 use crate::fat_error::{FatError, FatResult};
 use crate::hal::shared_flash::MutexFlashStorage;
@@ -12,13 +12,24 @@ pub const SAVEGAME_SLOT_SIZE: usize = 16384;
 //keep a little of space at the end due to partition table offsets
 const SAFETY: usize = 5;
 /// Number of slots in the 8 MB storage partition.
-pub const SAVEGAME_SLOT_COUNT: usize = (8 * 1024 * 1024) / SAVEGAME_SLOT_SIZE  - SAFETY; // 507
+pub const SAVEGAME_SLOT_COUNT: usize = (8 * 1024 * 1024) / SAVEGAME_SLOT_SIZE - SAFETY; // 507
 
 /// 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,
+    /// UTC timestamp in RFC3339 format when the save was created
+    pub created_at: Option<alloc::string::String>,
+}
+
+/// Wrapper that includes both the config data and metadata like creation timestamp.
+#[derive(Serialize, Deserialize, Debug)]
+struct SaveWrapper {
+    /// UTC timestamp in RFC3339 format
+    created_at: alloc::string::String,
+    /// Raw config JSON data
+    data: Vec<u8>,
 }
 
 // ── Flash adapter ──────────────────────────────────────────────────────────────
@@ -94,19 +105,25 @@ impl SavegameManager {
         })
     }
 
-    /// Persist `data` (JSON bytes) to the next available slot.
+    /// Persist `data` (JSON bytes) to the next available slot with a UTC timestamp.
     ///
     /// `scan()` advances the internal wear-leveling pointer to the latest valid
     /// slot before `append()` writes to the next free one.
     /// Both operations are performed atomically on the same Storage instance.
-    pub fn save(&mut self, data: &mut [u8]) -> FatResult<()> {
+    pub fn save(&mut self, data: &mut [u8], timestamp: &str) -> FatResult<()> {
+        let wrapper = SaveWrapper {
+            created_at: alloc::string::String::from(timestamp),
+            data: data.to_vec(),
+        };
+        let mut serialized = serde_json::to_vec(&wrapper)?;
         let mut st = self.storage();
         let _slot = st.scan()?;
-        st.append(data)?;
+        st.append(&mut serialized)?;
         Ok(())
     }
 
     /// Load the most recently saved data.  Returns `None` if no valid save exists.
+    /// Unwraps the SaveWrapper and returns only the config data.
     pub fn load_latest(&mut self) -> FatResult<Option<Vec<u8>>> {
         let mut st = self.storage();
         let slot = st.scan()?;
@@ -116,7 +133,14 @@ impl SavegameManager {
                 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())),
+                    Some(data) => {
+                        // Try to deserialize as SaveWrapper (new format)
+                        match serde_json::from_slice::<SaveWrapper>(data) {
+                            Ok(wrapper) => Ok(Some(wrapper.data)),
+                            // Fallback to raw data for backwards compatibility
+                            Err(_) => Ok(Some(data.to_vec())),
+                        }
+                    }
                 }
             }
         }
@@ -124,12 +148,20 @@ impl SavegameManager {
 
     /// Load a specific save by slot index.  Returns `None` if the slot is
     /// empty or contains an invalid checksum.
+    /// Unwraps the SaveWrapper and returns only the config data.
     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())),
+            Some(data) => {
+                // Try to deserialize as SaveWrapper (new format)
+                match serde_json::from_slice::<SaveWrapper>(data) {
+                    Ok(wrapper) => Ok(Some(wrapper.data)),
+                    // Fallback to raw data for backwards compatibility
+                    Err(_) => Ok(Some(data.to_vec())),
+                }
+            }
         }
     }
 
@@ -141,15 +173,24 @@ impl SavegameManager {
 
     /// 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.
+    /// Extracts timestamps from SaveWrapper if available.
     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)? {
+                // Try to deserialize as SaveWrapper to extract timestamp
+                let (len, created_at) = match serde_json::from_slice::<SaveWrapper>(data) {
+                    Ok(wrapper) => (wrapper.data.len() as u32, Some(wrapper.created_at)),
+                    // Old format without timestamp
+                    Err(_) => (data.len() as u32, None),
+                };
+
                 saves.push(SaveInfo {
                     idx,
-                    len: data.len() as u32,
+                    len,
+                    created_at,
                 });
             }
         }

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

@@ -1,5 +1,5 @@
-use crate::BOARD_ACCESS;
 use crate::vec;
+use crate::BOARD_ACCESS;
 use alloc::string::ToString;
 use alloc::vec::Vec;
 use bytemuck::{AnyBitPattern, Pod, Zeroable};
@@ -33,6 +33,12 @@ static mut LOG_ARRAY: LogArray = LogArray {
 pub static LOG_ACCESS: Mutex<CriticalSectionRawMutex, &'static mut LogArray> =
     unsafe { Mutex::new(&mut LOG_ARRAY) };
 
+mod interceptor;
+
+pub use interceptor::InterceptorLogger;
+
+pub static INTERCEPTOR: InterceptorLogger = InterceptorLogger::new();
+
 pub struct LogRequest {
     pub message_key: LogMessage,
     pub number_a: u32,

Software/MainBoard/rust/src/main.rs

@@ -167,7 +167,11 @@ async fn safe_main(spawner: Spawner) -> FatResult<()> {
     let cur = match board.board_hal.get_rtc_module().get_rtc_time().await {
         Ok(value) => {
             {
-                board.board_hal.get_esp().rtc.set_current_time_us(value.timestamp_micros() as u64);
+                board
+                    .board_hal
+                    .get_esp()
+                    .rtc
+                    .set_current_time_us(value.timestamp_micros() as u64);
             }
             value
         }
@@ -332,7 +336,14 @@ async fn safe_main(spawner: Spawner) -> FatResult<()> {
             match err {
                 TankError::SensorDisabled => { /* unreachable */ }
                 TankError::SensorMissing(raw_value_mv) => {
-                    log(LogMessage::TankSensorMissing, raw_value_mv as u32, 0, "", "").await
+                    log(
+                        LogMessage::TankSensorMissing,
+                        raw_value_mv as u32,
+                        0,
+                        "",
+                        "",
+                    )
+                    .await
                 }
                 TankError::SensorValueError { value, min, max } => {
                     log(
@@ -455,7 +466,7 @@ async fn safe_main(spawner: Spawner) -> FatResult<()> {
                     pump_ineffective,
                     result.median_current_ma,
                     result.max_current_ma,
-                    result.min_current_ma
+                    result.min_current_ma,
                 )
                 .await;
             } else if !state.pump_in_timeout(plant_config, &timezone_time) {
@@ -907,7 +918,7 @@ async fn pump_info(
     pump_ineffective: bool,
     median_current_ma: u16,
     max_current_ma: u16,
-    min_current_ma: u16
+    min_current_ma: u16,
 ) {
     let pump_info = PumpInfo {
         enabled: pump_active,
@@ -920,7 +931,11 @@ async fn pump_info(
 
     match serde_json::to_string(&pump_info) {
         Ok(state) => {
-            board.board_hal.get_esp().mqtt_publish(&pump_topic, &state).await;
+            board
+                .board_hal
+                .get_esp()
+                .mqtt_publish(&pump_topic, &state)
+                .await;
         }
         Err(err) => {
             warn!("Error publishing pump state {err}");
@@ -1167,7 +1182,7 @@ use embassy_time::WithTimeout;
 #[esp_rtos::main]
 async fn main(spawner: Spawner) -> ! {
     // intialize embassy
-    logger::init_logger_from_env();
+    crate::log::INTERCEPTOR.init();
     spawner.must_spawn(crate::log::log_task());
     //force init here!
     match BOARD_ACCESS.init(

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

@@ -10,8 +10,8 @@ mod post_json;
 use crate::fat_error::{FatError, FatResult};
 use crate::webserver::backup_manager::{backup_config, backup_info, get_backup_config};
 use crate::webserver::get_json::{
-    get_battery_state, get_config, get_live_moisture, get_log_localization_config, get_solar_state,
+    delete_save, get_battery_state, get_config, get_live_moisture, get_log_localization_config,
-    delete_save, get_time, get_timezones, get_version_web, list_saves, tank_info,
+    get_solar_state, 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};
@@ -64,6 +64,7 @@ impl Handler for HTTPRequestRouter {
                 e
             })?
         } else {
+            crate::log::INTERCEPTOR.start_capture().await;
             match method {
                 Method::Get => match path {
                     "/favicon.ico" => serve_favicon(conn).await?,
@@ -138,7 +139,9 @@ impl Handler for HTTPRequestRouter {
                             .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() })),
+                            None => Some(Err(FatError::String {
+                                error: "missing idx parameter".into(),
+                            })),
                         }
                     } else {
                         None
@@ -164,6 +167,7 @@ impl Handler for HTTPRequestRouter {
         let response_time = Instant::now().duration_since(start).as_millis();
 
         info!("\"{method} {path}\" {code} {response_time}ms");
+        crate::log::INTERCEPTOR.stop_capture().await;
         Ok(())
     }
 }
@@ -261,8 +265,17 @@ where
             }
         },
         Err(err) => {
-            let error_text = err.to_string();
+            let mut error_text = err.to_string();
             info!("error handling process {error_text}");
+
+            if let Some(logs) = crate::log::INTERCEPTOR.stop_capture().await {
+                error_text.push_str("\n\nCaptured Logs:\n");
+                for log in logs {
+                    error_text.push_str(&log);
+                    error_text.push('\n');
+                }
+            }
+
             conn.initiate_response(
                 500,
                 Some("OK"),

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

@@ -37,6 +37,7 @@ export interface NetworkConfig {
 export interface SaveInfo {
     idx: number,
     len: number,
+    created_at: string | null,
 }
 
 export interface FileList {

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

@@ -33,6 +33,7 @@ class SaveEntry {
     this.view.innerHTML = template.replaceAll("${fileid}", String(fileid));
 
     let name = document.getElementById("file_" + fileid + "_name") as HTMLElement;
+    let created = document.getElementById("file_" + fileid + "_created") as HTMLElement;
     let size = document.getElementById("file_" + fileid + "_size") as HTMLElement;
     let deleteBtn = document.getElementById("file_" + fileid + "_delete") as HTMLButtonElement;
     deleteBtn.onclick = () => {
@@ -45,5 +46,17 @@ class SaveEntry {
 
     name.innerText = "Slot " + saveinfo.idx;
     size.innerText = saveinfo.len + " bytes";
+
+    // Format timestamp in browser's local timezone
+    if (saveinfo.created_at) {
+      try {
+        const date = new Date(saveinfo.created_at);
+        created.innerText = date.toLocaleString();
+      } catch (e) {
+        created.innerText = "Invalid date";
+      }
+    } else {
+      created.innerText = "Unknown";
+    }
   }
 }

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

@@ -2,6 +2,11 @@
     <div id="file_${fileid}_name" class="filetitle">Slot</div>
 </div>
 
+<div class="flexcontainer">
+    <div class="filekey">Created</div>
+    <div id="file_${fileid}_created" class="filevalue"></div>
+</div>
+
 <div class="flexcontainer">
     <div class="filekey">Size</div>
     <div id="file_${fileid}_size" class="filevalue"></div>