fix tank.rs errors after intial implementation

rust/src/plant_hal.rs

@@ -472,7 +472,7 @@ impl PlantCtrlBoard<'_> {
     }
 
     /// return median tank sensor value in milli volt
-    pub fn tank_sensor_voltage(&mut self) -> Result<u16> {
+    pub fn tank_sensor_voltage(&mut self) -> Result<f32> {
         let delay = Delay::new_default();
         self.tank_power.set_high()?;
         //let stabilize

rust/src/tank.rs

@@ -1,4 +1,4 @@
-use crate::config::{self, PlantControllerConfig, TankConfig};
+use crate::{config::{self, PlantControllerConfig, TankConfig}, plant_hal::PlantCtrlBoard};
 
 const OPEN_TANK_VOLTAGE: f32 = 3.0;
 
@@ -24,14 +24,15 @@ pub enum TankError {
     SensorDisabled,
     SensorMissing(f32),
     SensorValueError { value: f32, min: f32, max: f32 },
+    BoardError(anyhow::Error)
 }
 
 pub enum TankState {
-    TankSensorPresent(u16),
+    TankSensorPresent(f32),
     TankSensorDisabled,
 }
 
-fn raw_volatge_to_divider_percent(raw_value_mv: u16) -> Result<f32, TankError> {
+fn raw_volatge_to_divider_percent(raw_value_mv: f32) -> Result<f32, TankError> {
     if raw_value_mv > OPEN_TANK_VOLTAGE {
         return Err(TankError::SensorMissing(raw_value_mv));
     }
@@ -51,19 +52,19 @@ fn raw_volatge_to_divider_percent(raw_value_mv: u16) -> Result<f32, TankError> {
 }
 
 fn raw_voltage_to_tank_fill_percent(
-    raw_value_mv: u16,
+    raw_value_mv: f32,
     config: &TankConfig,
 ) -> Result<f32, TankError> {
     let divider_percent = raw_volatge_to_divider_percent(raw_value_mv)?;
-    if s < config.tank_empty_percent || s > config.tank_full_percent {
+    if divider_percent < config.tank_empty_percent.into() || divider_percent > config.tank_full_percent.into() {
         return Err(TankError::SensorValueError {
             value: divider_percent,
-            min: config.tank_empty_percent,
-            max: config.tank_full_percent,
+            min: config.tank_empty_percent.into(),
+            max: config.tank_full_percent.into(),
         });
     }
-    Ok((divider_percent - config.tank_empty_percent) * 100
-        / (config.tank_full_percent - config.tank_empty_percent))
+    Ok((divider_percent - f32::from(config.tank_empty_percent)) * 100.
+        / f32::from(config.tank_full_percent - config.tank_empty_percent))
 }
 
 
@@ -72,7 +73,7 @@ impl TankState {
         match self {
             TankState::TankSensorDisabled => Err(TankError::SensorDisabled),
             TankState::TankSensorPresent(raw_value_mv) => {
-                let tank_fill_percent = raw_voltage_to_tank_fill_percent(raw_value_mv, config)?;
+                let tank_fill_percent = raw_voltage_to_tank_fill_percent(*raw_value_mv, config)?;
                 //TODO(judge) move logging to more sensible place
                 //println!(
                     //"Tank sensor returned mv {} as {}% leaving {} ml useable",
@@ -86,8 +87,8 @@ impl TankState {
         match self {
             TankState::TankSensorDisabled => Err(TankError::SensorDisabled),
             TankState::TankSensorPresent(raw_value_mv) => {
-                let tank_fill_percent = raw_voltage_to_tank_fill_percent(raw_value_mv, config)?;
-                if tank_fill_percent > config.tank_empty_percent {
+                let tank_fill_percent = raw_voltage_to_tank_fill_percent(*raw_value_mv, config)?;
+                if tank_fill_percent > config.tank_empty_percent.into() {
                     //TODO(judge) move logging to more sensible place
                     //println!(
                         //"Enough water, current percent is {}, minimum empty level is {}",
@@ -105,8 +106,8 @@ impl TankState {
         match self {
             TankState::TankSensorDisabled => Err(TankError::SensorDisabled),
             TankState::TankSensorPresent(raw_value_mv) => {
-                let tank_fill_percent = raw_voltage_to_tank_fill_percent(raw_value_mv, config)?;
-                if tank_fill_percent < config.tank_warn_percent {
+                let tank_fill_percent = raw_voltage_to_tank_fill_percent(*raw_value_mv, config)?;
+                if tank_fill_percent < config.tank_warn_percent.into() {
                     //TODO(judge) move logging to more sensible place
                     //println!(
                         //"Low water, current percent is {}, minimum warn level is {}",
@@ -121,9 +122,11 @@ impl TankState {
             },
         }
     }
+
+
 }
 
-#[derive(Serialize)]
+#[derive(serde::Serialize)]
 pub struct TankStateMQTT {
     enough_water: bool,
     warn_level: bool,
@@ -136,11 +139,11 @@ pub struct TankStateMQTT {
 pub fn determine_tank_state(
     board: &mut std::sync::MutexGuard<'_, PlantCtrlBoard<'_>>,
     config: &PlantControllerConfig,
-) -> TankState {
+) -> Result<TankState, TankError> {
     if config.tank.tank_sensor_enabled {
-        let raw_sensor_value_mv = board.tank_sensor_voltage();
-        TankState::TankSensorPresent(raw_sensor_value_mv)
+        let raw_sensor_value_mv = board.tank_sensor_voltage().map_err(|err| TankError::BoardError(err))?;
+        Ok(TankState::TankSensorPresent(raw_sensor_value_mv))
     } else {
-        TankState::TankSensorDisabled
+        Ok(TankState::TankSensorDisabled)
     }
 }