diff --git a/rust/src/main.rs b/rust/src/main.rs
index be5165a..d35aec3 100644
--- a/rust/src/main.rs
+++ b/rust/src/main.rs
@@ -71,23 +71,42 @@ struct LightState {
 }
 
 #[derive(Debug, PartialEq, Default)]
+/// State of a single plant to be tracked
+///
+/// TODO can some state be replaced with functions
+/// TODO unify with PlantStateMQTT
 struct PlantState {
+    /// state of humidity sensor on bank a
     a: Option<u8>,
+    /// raw measured frequency value for sensor on bank a in hertz
     a_raw: Option<u32>,
+    /// state of humidity sensor on bank b
     b: Option<u8>,
+    /// raw measured frequency value for sensor on bank b in hertz
     b_raw: Option<u32>,
+    /// how often has the logic determined that plant should have been irrigated but wasn't
     consecutive_pump_count: u32,
-    after_p: Option<u8>,
+    /// plant needs to be watered
     do_water: bool,
+    /// is plant considerd to be dry according to settings
     dry: bool,
+    /// is pump currently running
     active: bool,
+    /// TODO: convert this to an Option<PumpErorr> enum for every case that can happen
     pump_error: bool,
+    /// if pump count has increased higher than configured limit
     not_effective: bool,
+    /// plant irrigation cooldown is active
     cooldown: bool,
+    /// we want to irrigate but tank is empty
     no_water: bool,
+    ///TODO: combine with field a using Result
     sensor_error_a: Option<SensorError>,
+    ///TODO: combine with field b using Result
     sensor_error_b: Option<SensorError>,
+    /// pump should not be watered at this time of day
     out_of_work_hour: bool,
+    /// next time when pump should activate
     next_pump: Option<DateTime<Tz>>,
 }