Add missing Box import in battery module

Hardware/open-bms/bms/bms.kicad_pcb

@@ -893,7 +893,7 @@
 			(uuid "f5c71e09-1c64-4699-a872-7959060ff54c")
 		)
 		(embedded_fonts no)
-		(model "${KICAD6_3DMODEL_DIR}/Capacitor_SMD.3dshapes/C_0603_1608Metric.wrl"
+		(model "${KICAD10_3DMODEL_DIR}/Capacitor_SMD.3dshapes/C_0603_1608Metric.step"
 			(offset
 				(xyz 0 0 0)
 			)
@@ -2381,7 +2381,7 @@
 			(uuid "2619df3e-b807-4d9d-86fd-1890ae6a2950")
 		)
 		(embedded_fonts no)
-		(model "${KICAD6_3DMODEL_DIR}/Capacitor_SMD.3dshapes/C_0603_1608Metric.wrl"
+		(model "${KICAD10_3DMODEL_DIR}/Capacitor_SMD.3dshapes/C_0603_1608Metric.step"
 			(offset
 				(xyz 0 0 0)
 			)
@@ -3089,7 +3089,7 @@
 			(uuid "29bb50c2-8c3f-4ba0-bb86-3c75e758d317")
 		)
 		(embedded_fonts no)
-		(model "${KICAD6_3DMODEL_DIR}/Capacitor_SMD.3dshapes/C_0603_1608Metric.wrl"
+		(model "${KICAD10_3DMODEL_DIR}/Capacitor_SMD.3dshapes/C_0603_1608Metric.step"
 			(offset
 				(xyz 0 0 0)
 			)
@@ -3622,7 +3622,7 @@
 			(uuid "ac7efe3b-be6c-4633-baa1-c7a44a15dc73")
 		)
 		(embedded_fonts no)
-		(model "${KICAD6_3DMODEL_DIR}/Package_TO_SOT_SMD.3dshapes/SOT-23.wrl"
+		(model "${KICAD10_3DMODEL_DIR}/Package_TO_SOT_SMD.3dshapes/SOT-23.step"
 			(offset
 				(xyz 0 0 0)
 			)
@@ -6371,7 +6371,7 @@
 			(uuid "f844f701-66c7-484d-a7cf-cff3b6cdd615")
 		)
 		(embedded_fonts no)
-		(model "${KICAD6_3DMODEL_DIR}/Capacitor_SMD.3dshapes/C_1206_3216Metric.wrl"
+		(model "${KICAD10_3DMODEL_DIR}/Capacitor_SMD.3dshapes/C_1206_3216Metric.step"
 			(offset
 				(xyz 0 0 0)
 			)
@@ -8173,7 +8173,7 @@
 			(uuid "09bb897b-8ad7-4832-82c0-09ce6f9fd4df")
 		)
 		(embedded_fonts no)
-		(model "${KICAD6_3DMODEL_DIR}/Capacitor_SMD.3dshapes/C_0603_1608Metric.wrl"
+		(model "${KICAD10_3DMODEL_DIR}/Capacitor_SMD.3dshapes/C_0603_1608Metric.step"
 			(offset
 				(xyz 0 0 0)
 			)
@@ -10055,7 +10055,7 @@
 			(uuid "3e5e9acf-dab8-4180-8dd7-e2e038a511be")
 		)
 		(embedded_fonts no)
-		(model "${KICAD6_3DMODEL_DIR}/Capacitor_SMD.3dshapes/C_0603_1608Metric.wrl"
+		(model "${KICAD10_3DMODEL_DIR}/Capacitor_SMD.3dshapes/C_0603_1608Metric.step"
 			(offset
 				(xyz 0 0 0)
 			)
@@ -13870,7 +13870,7 @@
 			(uuid "a9590be1-1db5-48eb-8721-a2ce5049db3f")
 		)
 		(embedded_fonts no)
-		(model "${KICAD6_3DMODEL_DIR}/Capacitor_SMD.3dshapes/C_0603_1608Metric.wrl"
+		(model "${KICAD10_3DMODEL_DIR}/Capacitor_SMD.3dshapes/C_0603_1608Metric.step"
 			(offset
 				(xyz 0 0 0)
 			)

Hardware/open-bms/bms/bms.kicad_pro

@@ -50,7 +50,23 @@
         "silk_text_thickness": 0.1,
         "silk_text_upright": false,
         "zones": {
-          "min_clearance": 0.5
+          "border_display_style": 2,
+          "border_hatch_pitch": 0.5,
+          "corner_radius": 0.0,
+          "corner_smoothing": 0,
+          "fill_mode": 0,
+          "hatch_gap": 1.5,
+          "hatch_orientation": 0.0,
+          "hatch_smoothing_level": 0,
+          "hatch_smoothing_value": 0.1,
+          "hatch_thickness": 1.0,
+          "min_clearance": 0.5,
+          "min_island_area": 10.0,
+          "min_thickness": 0.25,
+          "pad_connection": 1,
+          "remove_islands": 0,
+          "thermal_relief_gap": 0.5,
+          "thermal_relief_spoke_width": 0.5
         }
       },
       "diff_pair_dimensions": [

Software/MainBoard/rust/src/config.rs

@@ -112,6 +112,14 @@ pub struct PlantControllerConfig {
     pub timezone: Option<String>,
 }
 
+#[derive(Serialize, Deserialize, Clone, Debug, PartialEq, Default)]
+pub enum SensorCombineMode {
+    Min,
+    Max,
+    #[default]
+    Avg,
+}
+
 #[derive(Serialize, Deserialize, Clone, Debug, PartialEq)]
 #[serde(default)]
 pub struct PlantConfig {
@@ -133,6 +141,7 @@ pub struct PlantConfig {
     pub ignore_current_error: bool,
     pub fertilizer_s: u16,
     pub fertilizer_cooldown_min: u16,
+    pub sensor_combine_mode: SensorCombineMode,
 }
 
 impl Default for PlantConfig {
@@ -156,6 +165,7 @@ impl Default for PlantConfig {
             ignore_current_error: true,
             fertilizer_s: 0,
             fertilizer_cooldown_min: 1440, // 1 day default
+            sensor_combine_mode: SensorCombineMode::Avg,
         }
     }
 }

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

@@ -1,5 +1,5 @@
-use crate::fat_error::{FatError, FatResult};
 use crate::hal::Box;
+use crate::fat_error::{FatError, FatResult};
 use alloc::string::String;
 use async_trait::async_trait;
 use embassy_embedded_hal::shared_bus::blocking::i2c::I2cDevice;
@@ -81,7 +81,8 @@ impl BatteryInteraction for WCHI2CSlave<'_> {
 
         let state_of_charge =
             state.remaining_capacity_mah as f32 * 100. / state.lifetime_capacity_mah as f32;
-        let state_of_health = state.lifetime_capacity_mah as f32 / config.capacity_mah as f32 * 100.;
+        let state_of_health =
+            state.lifetime_capacity_mah as f32 / config.capacity_mah as f32 * 100.;
 
         Ok(BatteryState::Info(BatteryInfo {
             voltage_mv: Some(state.current_mv),
@@ -91,7 +92,7 @@ impl BatteryInteraction for WCHI2CSlave<'_> {
             soc_pct: Some(state_of_charge),
             soh_pct: Some(state_of_health),
             temperature_c: Some(state.temperature_celcius),
-            error: None
+            error: None,
         }))
     }
 

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

@@ -1,5 +1,5 @@
 use crate::bail;
-use crate::config::{PlantControllerConfig};
+use crate::config::PlantControllerConfig;
 use crate::hal::savegame_manager::SavegameManager;
 use crate::hal::PLANT_COUNT;
 use crate::log::{log, LogMessage};
@@ -16,7 +16,6 @@ use embedded_storage::nor_flash::{check_erase, NorFlash, ReadNorFlash, RmwNorFla
 use esp_bootloader_esp_idf::ota::OtaImageState::Valid;
 use esp_bootloader_esp_idf::ota::{Ota, OtaImageState};
 use esp_bootloader_esp_idf::partitions::{AppPartitionSubType, FlashRegion};
-use serde::{Deserialize, Serialize};
 use esp_hal::gpio::{Input, RtcPinWithResistors};
 use esp_hal::rng::Rng;
 use esp_hal::rtc_cntl::{
@@ -26,10 +25,11 @@ use esp_hal::rtc_cntl::{
 use esp_hal::system::software_reset;
 use esp_hal::uart::Uart;
 use esp_hal::Blocking;
-use esp_radio::wifi::ap::{AccessPointInfo};
+use esp_radio::wifi::ap::AccessPointInfo;
 use esp_radio::wifi::scan::{ScanConfig, ScanTypeConfig};
 use esp_radio::wifi::{Interface, WifiController};
 use log::{error, info};
+use serde::{Deserialize, Serialize};
 
 /// Detailed Wi-Fi scan information including signal strength
 #[derive(Serialize, Deserialize, Debug, Clone)]
@@ -45,11 +45,15 @@ pub struct WifiScanDetails {
 fn format_bssid(bssid: &[u8; 6]) -> String {
     alloc::format!(
         "{:02x}:{:02x}:{:02x}:{:02x}:{:02x}:{:02x}",
-        bssid[0], bssid[1], bssid[2], bssid[3], bssid[4], bssid[5]
+        bssid[0],
+        bssid[1],
+        bssid[2],
+        bssid[3],
+        bssid[4],
+        bssid[5]
     )
 }
 
-
 #[esp_hal::ram(unstable(rtc_fast), unstable(persistent))]
 static mut LAST_WATERING_TIMESTAMP: [i64; PLANT_COUNT] = [0; PLANT_COUNT];
 #[esp_hal::ram(unstable(rtc_fast), unstable(persistent))]
@@ -222,7 +226,7 @@ impl Esp<'_> {
                 ssid: ap.ssid.as_str().to_string(),
                 bssid: format_bssid(&ap.bssid),
                 rssi: ap.signal_strength as i32,
-                channel: ap.channel as u8,
+                channel: ap.channel,
                 auth_method: format!("{:?}", ap.auth_method),
             })
             .collect();
@@ -414,5 +418,4 @@ impl Esp<'_> {
             }
         }
     }
-
 }

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

@@ -7,7 +7,7 @@ use esp_hal::delay::Delay;
 use esp_hal::gpio::{DriveMode, Flex, Input, InputConfig, Output, OutputConfig, Pull};
 use esp_hal::pcnt::channel::CtrlMode::Keep;
 use esp_hal::pcnt::channel::EdgeMode::{Hold, Increment};
-use esp_hal::pcnt::unit::{Unit};
+use esp_hal::pcnt::unit::Unit;
 use esp_hal::peripherals::GPIO5;
 use esp_hal::Async;
 use log::{error, info};
@@ -145,7 +145,11 @@ impl<'a> TankSensor<'a> {
                 water_temp_sensor = Some(device);
                 break;
             } else {
-                info!("OneWire: skipping device — not a DS18B20 (family 0x{:02X} != 0x{:02X})", device.address[0], ds18b20::FAMILY_CODE);
+                info!(
+                    "OneWire: skipping device — not a DS18B20 (family 0x{:02X} != 0x{:02X})",
+                    device.address[0],
+                    ds18b20::FAMILY_CODE
+                );
             }
         }
         if devices_found == 0 {

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

@@ -32,7 +32,8 @@ impl LiveLogBuffer {
         match after {
             None => (self.entries.clone(), false, next_seq),
             Some(after_seq) => {
-                let result: Vec<_> = self.entries
+                let result: Vec<_> = self
+                    .entries
                     .iter()
                     .filter(|(seq, _)| *seq > after_seq)
                     .cloned()

Software/MainBoard/rust/src/main.rs

@@ -14,9 +14,9 @@
 esp_bootloader_esp_idf::esp_app_desc!();
 use esp_backtrace as _;
 
-use crate::hal::PROGRESS_ACTIVE;
 use crate::config::{PlantConfig, PlantControllerConfig};
 use crate::fat_error::{ContextExt, FatResult};
+use crate::hal::PROGRESS_ACTIVE;
 
 use crate::log::log;
 use crate::tank::{determine_tank_state, TankError, WATER_FROZEN_THRESH};
@@ -42,8 +42,8 @@ use embassy_sync::once_lock::OnceLock;
 use embassy_time::{Duration, Instant, Timer};
 use esp_hal::rom::ets_delay_us;
 use esp_hal::system::software_reset;
-use esp_println::{println};
-use hal::battery::{BatteryState};
+use esp_println::println;
+use hal::battery::BatteryState;
 use log::LogMessage;
 use option_lock::OptionLock;
 use plant_state::PlantState;
@@ -123,8 +123,6 @@ pub struct PumpResult {
     overcurrent_ma: Option<u16>,
 }
 
-
-
 async fn safe_main(spawner: Spawner) -> FatResult<()> {
     info!("Startup Rust");
 
@@ -208,10 +206,15 @@ async fn safe_main(spawner: Spawner) -> FatResult<()> {
         info!("No wifi configured, starting initial config mode");
 
         let esp = board.board_hal.get_esp();
-        let ssid = esp.load_config().await
+        let ssid = esp
+            .load_config()
+            .await
             .map(|config| config.network.ap_ssid.to_string())
             .unwrap_or_else(|_| String::from("PlantCtrl Emergency Mode"));
-        let device = esp.interface_ap.take().context("AP interface already taken")?;
+        let device = esp
+            .interface_ap
+            .take()
+            .context("AP interface already taken")?;
         let stack = network::wifi_ap(ssid, device, &esp.controller, &mut esp.rng, spawner).await?;
 
         let reboot_now = Arc::new(AtomicBool::new(false));
@@ -236,14 +239,18 @@ async fn safe_main(spawner: Spawner) -> FatResult<()> {
 
         let res = {
             let esp = board.board_hal.get_esp();
-            let ssid = esp.load_config().await
+            let ssid = esp
+                .load_config()
+                .await
                 .map(|config| config.network.ap_ssid.to_string())
                 .unwrap_or_else(|_| String::from("PlantCtrl Emergency Mode"));
             let device = match esp.interface_ap.take() {
                 Some(d) => d,
                 None => {
                     use crate::fat_error::FatError;
-                    return Err(FatError::String { error: "AP interface already taken".to_string() });
+                    return Err(FatError::String {
+                        error: "AP interface already taken".to_string(),
+                    });
                 }
             };
             network::wifi_ap(ssid, device, &esp.controller, &mut esp.rng, spawner).await
@@ -276,7 +283,9 @@ async fn safe_main(spawner: Spawner) -> FatResult<()> {
 
     if let network::NetworkMode::WIFI { ref ip_address, .. } = network_mode {
         mqtt::publish_firmware_info(version, ip_address, &timezone_time.to_rfc3339()).await;
-        mqtt::publish_battery_state(&mut board).await.unwrap_or_else(|e| {
+        mqtt::publish_battery_state(&mut board)
+            .await
+            .unwrap_or_else(|e| {
                 error!("Error publishing battery state {e}");
             });
         let _ = mqtt::publish_mppt_state(&mut board).await;
@@ -325,7 +334,9 @@ async fn safe_main(spawner: Spawner) -> FatResult<()> {
         if let Some(err) = tank_state.got_error(&board.board_hal.get_config().tank) {
             match err {
                 TankError::SensorDisabled => { /* unreachable */ }
-                TankError::SensorMissing { raw_mv: raw_value_mv } => log(
+                TankError::SensorMissing {
+                    raw_mv: raw_value_mv,
+                } => log(
                     LogMessage::TankSensorMissing,
                     raw_value_mv as u32,
                     0,
@@ -355,7 +366,11 @@ async fn safe_main(spawner: Spawner) -> FatResult<()> {
     }
 
     let mut water_frozen = false;
-    let water_temp: FatResult<f32> = board.board_hal.get_tank_sensor().water_temperature_c().await;
+    let water_temp: FatResult<f32> = board
+        .board_hal
+        .get_tank_sensor()
+        .water_temperature_c()
+        .await;
 
     if let Ok(res) = water_temp {
         if res < WATER_FROZEN_THRESH {
@@ -581,11 +596,15 @@ async fn safe_main(spawner: Spawner) -> FatResult<()> {
                 light_state.battery_low = false;
             }
             BatteryState::Info(data) => {
-                if data.soc_pct.is_some_and(|soc| soc < board.board_hal.get_config().night_lamp.low_soc_cutoff as f32) {
+                if data.soc_pct.is_some_and(|soc| {
+                    soc < board.board_hal.get_config().night_lamp.low_soc_cutoff as f32
+                }) {
                     board.board_hal.get_esp().set_low_voltage_in_cycle();
                     info!("Set low voltage in cycle");
                 }
-                if data.soc_pct.is_some_and(|soc| soc > board.board_hal.get_config().night_lamp.low_soc_restore as f32) {
+                if data.soc_pct.is_some_and(|soc| {
+                    soc > board.board_hal.get_config().night_lamp.low_soc_restore as f32
+                }) {
                     board.board_hal.get_esp().clear_low_voltage_in_cycle();
                     info!("Clear low voltage in cycle");
                 }
@@ -988,8 +1007,7 @@ async fn wait_infinity(
                 let timezone_time = cur.with_timezone(&timezone);
 
                 mqtt::publish("/state", "config").await;
-                mqtt::publish("/firmware/last_online", &timezone_time.to_rfc3339())
-                    .await;
+                mqtt::publish("/firmware/last_online", &timezone_time.to_rfc3339()).await;
                 last_mqtt_update = Some(now);
             }
 

Software/MainBoard/rust/src/mqtt.rs

@@ -288,11 +288,7 @@ pub async fn publish_plant_states(
     Ok(())
 }
 
-pub async fn publish_firmware_info(
-    version: VersionInfo,
-    ip_address: &str,
-    timezone_time: &str,
-) {
+pub async fn publish_firmware_info(version: VersionInfo, ip_address: &str, timezone_time: &str) {
     publish("/firmware/address", ip_address).await;
     let version = &serde_json::to_string(&version);
     match version {
@@ -384,12 +380,7 @@ pub async fn publish_mppt_state(
 pub async fn publish_battery_state(
     board: &mut MutexGuard<'_, CriticalSectionRawMutex, HAL<'static>>,
 ) -> FatResult<()> {
-    let telemetry = match board
-        .board_hal
-        .get_battery_monitor()
-        .get_state()
-        .await
-    {
+    let telemetry = match board.board_hal.get_battery_monitor().get_state().await {
         Ok(BatteryState::Info(info)) => info,
         Ok(BatteryState::Unknown) => BatteryInfo {
             voltage_mv: None,

Software/MainBoard/rust/src/network.rs

@@ -1,13 +1,19 @@
 use crate::bail;
 use crate::config::NetworkConfig;
 use crate::fat_error::{ContextExt, FatError, FatResult};
-use crate::hal::{HAL};
+use crate::hal::HAL;
 use crate::mqtt;
 use crate::util::mk_static;
 use alloc::string::{String, ToString};
 use alloc::sync::Arc;
 use chrono::{DateTime, Utc};
 use core::net::{IpAddr, Ipv4Addr, SocketAddr, SocketAddrV4};
+use edge_dhcp::{
+    io::{self, DEFAULT_SERVER_PORT},
+    server::{Server, ServerOptions},
+};
+use edge_nal::UdpBind;
+use edge_nal_embassy::{Udp, UdpBuffers};
 use embassy_executor::Spawner;
 use embassy_net::dns::DnsQueryType;
 use embassy_net::udp::{PacketMetadata, UdpSocket};
@@ -15,21 +21,15 @@ use embassy_net::{DhcpConfig, Runner, Stack, StackResources, StaticConfigV4};
 use embassy_sync::blocking_mutex::raw::CriticalSectionRawMutex;
 use embassy_sync::mutex::{Mutex, MutexGuard};
 use embassy_time::{Duration, Timer, WithTimeout};
-use option_lock::OptionLock;
-use edge_dhcp::{
-    io::{self, DEFAULT_SERVER_PORT},
-    server::{Server, ServerOptions},
-};
-use edge_nal::UdpBind;
-use edge_nal_embassy::{Udp, UdpBuffers};
 use esp_hal::rng::Rng;
 use esp_println::println;
 use esp_radio::wifi::ap::AccessPointConfig;
 use esp_radio::wifi::sta::StationConfig;
 use esp_radio::wifi::{AuthenticationMethod, Config, Interface};
-use log::{info, warn, error};
+use log::{error, info, warn};
+use option_lock::OptionLock;
 use serde::Serialize;
-use sntpc::{NtpContext, NtpTimestampGenerator, NtpUdpSocket, get_time};
+use sntpc::{get_time, NtpContext, NtpTimestampGenerator, NtpUdpSocket};
 
 const NTP_SERVER: &str = "pool.ntp.org";
 
@@ -225,8 +225,7 @@ pub async fn wifi_ap(
     );
     let stack = mk_static!(Stack, stack);
 
-    let client_config =
-        Config::AccessPoint(AccessPointConfig::default().with_ssid(ssid.clone()));
+    let client_config = Config::AccessPoint(AccessPointConfig::default().with_ssid(ssid.clone()));
     controller.lock().await.set_config(&client_config)?;
 
     println!("start net task");
@@ -352,7 +351,10 @@ pub async fn wifi(
         .await;
 
         if res.is_err() {
-            warn!("WiFi connection attempt {} failed: link up timeout", attempts + 1);
+            warn!(
+                "WiFi connection attempt {} failed: link up timeout",
+                attempts + 1
+            );
             attempts += 1;
             Timer::after(Duration::from_millis(500)).await;
             continue;
@@ -368,7 +370,10 @@ pub async fn wifi(
         .await;
 
         if res.is_err() {
-            warn!("WiFi connection attempt {} failed: config up timeout", attempts + 1);
+            warn!(
+                "WiFi connection attempt {} failed: config up timeout",
+                attempts + 1
+            );
             attempts += 1;
             Timer::after(Duration::from_millis(500)).await;
             continue;

Software/MainBoard/rust/src/plant_state.rs

@@ -1,13 +1,11 @@
+use crate::config::SensorCombineMode;
 use crate::hal::Moistures;
+use crate::plant_state::PlantWateringMode::TargetMoisture;
 use crate::{config::PlantConfig, hal::HAL, in_time_range};
 use chrono::{DateTime, TimeDelta, Utc};
 use chrono_tz::Tz;
 use serde::{Deserialize, Serialize};
 
-// Embedded environments may not have floating-point math functions.
-// For no_std with k=0.5 (square root), we use Newton's method approximation.
-// Formula: sqrt(t) ≈ iterative refinement for better wet-range discrimination.
-
 const MOIST_SENSOR_MAX_FREQUENCY: f32 = 160000.; // 160kHz -> very wet
 const MOIST_SENSOR_MIN_FREQUENCY: f32 = 400.; // this is really, really dry, think like cactus levels
 
@@ -17,7 +15,7 @@ pub enum MoistureSensorError {
     MissingMessage,
     NotExpectedMessage { hz: f32 },
     ShortCircuit { hz: f32, max: f32 },
-    OpenLoop { hz: f32, min: f32 }
+    OpenLoop { hz: f32, min: f32 },
 }
 
 #[derive(Debug, PartialEq, Serialize)]
@@ -113,8 +111,8 @@ pub struct PlantState {
     pub sensor_a_firmware_build_minutes: Option<u32>,
     /// Last known firmware build timestamp for sensor B.
     pub sensor_b_firmware_build_minutes: Option<u32>,
-    /// Last time fertilizer was applied (Unix timestamp in seconds).
-    pub last_fertilizer_time: i64,
+    /// Last time fertilizer was applied.
+    pub last_fertilizer_time: Option<DateTime<Utc>>,
 }
 
 /// Map sensor frequency to moisture percentage using inverse power-law scaling (quadratic).
@@ -228,8 +226,12 @@ impl PlantState {
 
         let previous_pump = board.board_hal.get_esp().last_pump_time(plant_id);
         let consecutive_pump_count = board.board_hal.get_esp().consecutive_pump_count(plant_id);
-        let last_fertilizer_time = board.board_hal.get_esp().last_fertilizer_time(plant_id);
+        let last_fertilizer_timestamp = board.board_hal.get_esp().last_fertilizer_time(plant_id);
         let (a_builds, b_builds) = board.board_hal.get_sensor_build_minutes();
+
+        let last_fertilizer_time = DateTime::from_timestamp_millis(last_fertilizer_timestamp);
+
+        // Create plant state first, then check for warnings
         let state = Self {
             sensor_a,
             sensor_b,
@@ -242,7 +244,20 @@ impl PlantState {
             sensor_b_firmware_build_minutes: b_builds[plant_id],
             last_fertilizer_time,
         };
-        if state.is_err() {
+
+        // Check for sensor warning condition (expected 2 sensors, only 1 responding)
+        let has_a =
+            state.sensor_a.moisture_percent().is_some() && state.sensor_a.is_err().is_none();
+        let has_b =
+            state.sensor_b.moisture_percent().is_some() && state.sensor_b.is_err().is_none();
+
+        // Check if we expected two sensors but only got one
+        let has_sensor_warning =
+            expected_a && expected_b && ((has_a && !has_b) || (!has_a && has_b));
+
+        // Set fault LED for both errors AND sensor warnings
+        let has_issue = state.is_err() || has_sensor_warning;
+        if has_issue {
             let _ = board.board_hal.fault(plant_id, true).await;
         }
         state
@@ -265,26 +280,25 @@ impl PlantState {
         self.sensor_a.is_err().is_some() || self.sensor_b.is_err().is_some()
     }
 
-    pub fn plant_moisture(
-        &self,
-    ) -> (
-        Option<f32>,
-        (Option<&MoistureSensorError>, Option<&MoistureSensorError>),
-    ) {
+    /// Get combined moisture value with configurable combination mode and sensor warning.
+    ///
+    /// Returns:
+    /// - Combined moisture percentage (or None if no valid readings)
+    /// - Tuple of errors from sensor A and B
+    /// - Sensor warning indicating if warning LED should be lit (MissingSecondSensor)
+    pub fn plant_moisture_with_warning(&self, plant_conf: &PlantConfig) -> Option<f32> {
         match (
             self.sensor_a.moisture_percent(),
             self.sensor_b.moisture_percent(),
         ) {
-            (Some(moisture_a), Some(moisture_b)) => {
-                (Some((moisture_a + moisture_b) / 2.), (None, None))
-            }
-            (Some(moisture_percent), _) => {
-                (Some(moisture_percent), (None, self.sensor_b.is_err()))
-            }
-            (_, Some(moisture_percent)) => {
-                (Some(moisture_percent), (self.sensor_a.is_err(), None))
-            }
-            _ => (None, (self.sensor_a.is_err(), self.sensor_b.is_err())),
+            (Some(moisture_a), Some(moisture_b)) => match plant_conf.sensor_combine_mode {
+                SensorCombineMode::Min => Some(moisture_a.min(moisture_b)),
+                SensorCombineMode::Max => Some(moisture_a.max(moisture_b)),
+                SensorCombineMode::Avg => Some((moisture_a + moisture_b) / 2.0),
+            },
+            (Some(moisture), _) => Some(moisture),
+            (_, Some(moisture)) => Some(moisture),
+            _ => None,
         }
     }
 
@@ -296,7 +310,7 @@ impl PlantState {
         match plant_conf.mode {
             PlantWateringMode::Off => false,
             PlantWateringMode::TargetMoisture => {
-                let (moisture_percent, _) = self.plant_moisture();
+                let moisture_percent = self.plant_moisture_with_warning(plant_conf);
                 if let Some(moisture_percent) = moisture_percent {
                     if self.pump_in_timeout(plant_conf, current_time) {
                         false
@@ -322,17 +336,18 @@ impl PlantState {
         }
     }
 
-    pub fn to_mqtt_info(
-        &self,
-        plant_conf: &PlantConfig,
-        current_time: &DateTime<Tz>,
-    ) -> PlantInfo {
-        let (moisture_pct, _) = self.plant_moisture();
+    pub fn to_mqtt_info(&self, plant_conf: &PlantConfig, current_time: &DateTime<Tz>) -> PlantInfo {
+        let moisture_pct = self.plant_moisture_with_warning(plant_conf);
         PlantInfo {
             moisture_pct,
             sensor_a: Self::sensor_to_telemetry(&self.sensor_a),
             sensor_b: Self::sensor_to_telemetry(&self.sensor_b),
             mode: plant_conf.mode,
+            target_pct: if plant_conf.mode == TargetMoisture {
+                Some(plant_conf.target_moisture as f32)
+            } else {
+                None
+            },
             do_water: self.needs_to_be_watered(plant_conf, current_time),
             dry: if let Some(moisture_percent) = moisture_pct {
                 moisture_percent < plant_conf.target_moisture.into()
@@ -365,21 +380,39 @@ impl PlantState {
             } else {
                 None
             },
+            last_fertilizer: self
+                .last_fertilizer_time
+                .map(|t| t.with_timezone(&current_time.timezone())),
+            next_fertilizer: if matches!(
+                plant_conf.mode,
+                PlantWateringMode::TimerOnly
+                    | PlantWateringMode::TargetMoisture
+                    | PlantWateringMode::MinMoisture
+            ) {
+                self.last_fertilizer_time.and_then(|last_fert| {
+                    // Convert to Tz for calculation, then back
+                    let tz_last_fert = last_fert.with_timezone(&current_time.timezone());
+                    tz_last_fert
+                        .checked_add_signed(TimeDelta::minutes(
+                            plant_conf.fertilizer_cooldown_min.into(),
+                        ))
+                        .map(|t| t.with_timezone(&current_time.timezone()))
+                })
+            } else {
+                None
+            },
             sensor_a_firmware_build_minutes: self.sensor_a_firmware_build_minutes,
             sensor_b_firmware_build_minutes: self.sensor_b_firmware_build_minutes,
-            last_fertilizer_time: self.last_fertilizer_time,
         }
     }
 
     fn sensor_to_telemetry(sensor: &MoistureSensorState) -> SensorTelemetry {
         match sensor {
-            MoistureSensorState::NoMessage => {
-                SensorTelemetry {
+            MoistureSensorState::NoMessage => SensorTelemetry {
                 moisture_pct: None,
                 raw_hz: None,
-                    error: None
-                }
-            }
+                error: None,
+            },
             MoistureSensorState::MoistureValue {
                 hz,
                 moisture_percent,
@@ -402,6 +435,8 @@ impl PlantState {
 pub struct PlantInfo {
     /// combined plant moisture from available sensors
     moisture_pct: Option<f32>,
+    /// moisture target, if in targetmode
+    target_pct: Option<f32>,
     /// state of humidity sensor on bank a
     sensor_a: SensorTelemetry,
     /// state of humidity sensor on bank b
@@ -423,10 +458,12 @@ pub struct PlantInfo {
     last_pump: Option<DateTime<Tz>>,
     /// next time when pump should activate
     next_pump: Option<DateTime<Tz>>,
+    /// last time when fertilizer was applied
+    last_fertilizer: Option<DateTime<Tz>>,
+    /// next time when fertilizer should be applied
+    next_fertilizer: Option<DateTime<Tz>>,
     /// firmware build timestamp of sensor A (minutes since Unix epoch); None if unknown
     sensor_a_firmware_build_minutes: Option<u32>,
     /// firmware build timestamp of sensor B (minutes since Unix epoch); None if unknown
     sensor_b_firmware_build_minutes: Option<u32>,
-    /// last time when fertilizer was applied
-    last_fertilizer_time: i64,
 }

Software/MainBoard/rust/src/tank.rs

@@ -26,7 +26,9 @@ pub enum TankState {
 
 fn raw_voltage_to_divider_percent(raw_value_mv: f32) -> Result<f32, TankError> {
     if raw_value_mv > OPEN_TANK_VOLTAGE {
-        return Err(TankError::SensorMissing { raw_mv: raw_value_mv });
+        return Err(TankError::SensorMissing {
+            raw_mv: raw_value_mv,
+        });
     }
 
     let r2 = raw_value_mv * 50.0 / (3.3 - raw_value_mv);
@@ -161,12 +163,14 @@ pub async fn determine_tank_state(
     if board.board_hal.get_config().tank.tank_sensor_enabled {
         match board
             .board_hal
-            .get_tank_sensor().tank_sensor_voltage().await
+            .get_tank_sensor()
+            .tank_sensor_voltage()
+            .await
         {
-            Ok(raw_sensor_value_mv) => {
-                TankState::Present(raw_sensor_value_mv)
-            },
-            Err(err) => TankState::Error(TankError::BoardError { message: err.to_string() }),
+            Ok(raw_sensor_value_mv) => TankState::Present(raw_sensor_value_mv),
+            Err(err) => TankState::Error(TankError::BoardError {
+                message: err.to_string(),
+            }),
         }
     } else {
         TankState::Disabled

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

@@ -93,7 +93,11 @@ where
 {
     let mut board = BOARD_ACCESS.get().await.lock().await;
     let tank_state = determine_tank_state(&mut board).await;
-    let water_temp: FatResult<f32> = board.board_hal.get_tank_sensor().water_temperature_c().await;
+    let water_temp: FatResult<f32> = board
+        .board_hal
+        .get_tank_sensor()
+        .water_temperature_c()
+        .await;
     Ok(Some(serde_json::to_string(&tank_state.as_mqtt_info(
         &board.board_hal.get_config().tank,
         &water_temp,

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

@@ -10,9 +10,9 @@ mod post_json;
 use crate::fat_error::{FatError, FatResult};
 use crate::webserver::backup_manager::{backup_config, backup_info, get_backup_config};
 use crate::webserver::get_json::{
-    delete_save, get_battery_state, get_config, get_live_moisture, get_log_localization_config,
-    get_firmware_info_web, get_solar_state, get_time, get_timezones, list_saves, tank_info,
-    get_wifi_details,
+    delete_save, get_battery_state, get_config, get_firmware_info_web, get_live_moisture,
+    get_log_localization_config, get_solar_state, get_time, get_timezones, get_wifi_details,
+    list_saves, tank_info,
 };
 use crate::webserver::get_log::{get_live_log, get_log};
 use crate::webserver::get_static::{serve_bundle, serve_favicon, serve_index};

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

@@ -1,5 +1,6 @@
 use crate::config::PlantControllerConfig;
 use crate::fat_error::FatResult;
+use crate::hal::savegame_manager::SAVEGAME_SLOT_SIZE;
 use crate::hal::DetectionRequest;
 use crate::webserver::read_up_to_bytes_from_request;
 use crate::{do_secure_pump, BOARD_ACCESS};
@@ -135,7 +136,8 @@ pub(crate) async fn set_config<T, const N: usize>(
 where
     T: Read + Write,
 {
-    let all = read_up_to_bytes_from_request(request, Some(4096)).await?;
+    //accept nearly full slotsize leave some space for header
+    let all = read_up_to_bytes_from_request(request, Some(SAVEGAME_SLOT_SIZE - 512)).await?;
     let length = all.len();
     let config: PlantControllerConfig = serde_json::from_slice(&all)?;
 

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

@@ -141,6 +141,7 @@ export interface PlantConfig {
     min_pump_current_ma: number,
     max_pump_current_ma: number,
     ignore_current_error: boolean,
+    sensor_combine_mode: string,
 }
 
 export interface PumpTestResult {

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

@@ -29,6 +29,9 @@
     .plantSensorEnabledOnly_ ${plantId} {
     }
 
+    .plantBothSensorsOnly_ ${plantId} {
+    }
+
     .plantHidden_ ${plantId} {
         display: none;
     }
@@ -48,6 +51,14 @@
         <div class="plantkey">Sensor B installed:</div>
         <input class="plantcheckbox" id="plant_${plantId}_sensor_b" type="checkbox">
     </div>
+    <div class="flexcontainer plantBothSensorsOnly_${plantId}">
+        <div class="plantkey">Sensor Combine Mode:</div>
+        <select class="plantvalue" id="plant_${plantId}_sensor_combine_mode">
+            <option value="Min">Min</option>
+            <option value="Max">Max</option>
+            <option value="Avg">Average</option>
+        </select>
+    </div>
     <div class="flexcontainer">
         <div class="plantkey">
             Mode:

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

@@ -93,6 +93,7 @@ export class PlantView {
     private readonly pumpHourEnd: HTMLSelectElement;
     private readonly sensorAInstalled: HTMLInputElement;
     private readonly sensorBInstalled: HTMLInputElement;
+    private readonly sensorCombineMode: HTMLSelectElement;
     private readonly mode: HTMLSelectElement;
     private readonly moistureA: HTMLElement;
     private readonly moistureB: HTMLElement;
@@ -236,6 +237,14 @@ export class PlantView {
             controller.configChanged()
         }
 
+        this.sensorCombineMode = document.getElementById("plant_" + plantId + "_sensor_combine_mode") as HTMLSelectElement;
+        this.sensorCombineMode.onchange = function () {
+            controller.configChanged()
+        }
+
+        // Initial visibility update for sensor combine mode
+        this.updateSensorCombineModeState();
+
         this.minPumpCurrentMa = document.getElementById("plant_" + plantId + "_min_pump_current_ma") as HTMLInputElement;
         this.minPumpCurrentMa.onchange = function () {
             controller.configChanged()
@@ -271,6 +280,19 @@ export class PlantView {
         };
     }
 
+    updateSensorCombineModeState() {
+        const bothActive = this.sensorAInstalled.checked && this.sensorBInstalled.checked;
+        const bothOnlyElements = document.getElementsByClassName("plantBothSensorsOnly_" + this.plantId);
+        for (const element of Array.from(bothOnlyElements)) {
+            if (bothActive) {
+                element.classList.remove("plantHidden_" + this.plantId);
+            } else {
+                element.classList.add("plantHidden_" + this.plantId);
+            }
+        }
+        this.sensorCombineMode.disabled = !bothActive;
+    }
+
     updateVisibility(plantConfig: PlantConfig) {
         let sensorOnly = document.getElementsByClassName("plantSensorEnabledOnly_" + this.plantId)
         let pumpOnly = document.getElementsByClassName("plantPumpEnabledOnly_" + this.plantId)
@@ -324,6 +346,9 @@ export class PlantView {
         //         element.classList.add("plantHidden_" + this.plantId)
         //     }
         // }
+
+        // Update sensor combine mode visibility based on whether both sensors are active
+        this.updateSensorCombineModeState();
     }
 
     setTestResult(result: PumpTestResult) {
@@ -354,6 +379,7 @@ export class PlantView {
         this.pumpHourEnd.value = plantConfig.pump_hour_end.toString();
         this.sensorBInstalled.checked = plantConfig.sensor_b;
         this.sensorAInstalled.checked = plantConfig.sensor_a;
+        this.sensorCombineMode.value = plantConfig.sensor_combine_mode || "Min";
         this.maxConsecutivePumpCount.value = plantConfig.max_consecutive_pump_count.toString();
         this.minPumpCurrentMa.value = plantConfig.min_pump_current_ma.toString();
         this.maxPumpCurrentMa.value = plantConfig.max_pump_current_ma.toString();
@@ -383,6 +409,7 @@ export class PlantView {
             pump_hour_end: +this.pumpHourEnd.value,
             sensor_b: this.sensorBInstalled.checked,
             sensor_a: this.sensorAInstalled.checked,
+            sensor_combine_mode: this.sensorCombineMode.value,
             max_consecutive_pump_count: this.maxConsecutivePumpCount.valueAsNumber,
             moisture_sensor_min_frequency: this.moistureSensorMinFrequency.valueAsNumber || null,
             moisture_sensor_max_frequency: this.moistureSensorMaxFrequency.valueAsNumber || null,