v0.13.4

src/api/zones.rs

@@ -543,7 +543,7 @@ fn resolve_temporary_target(
             "temporary thermostat target must be between 8 and 30 C".into(),
         ));
     }
-    let target = (target * 2.0).round() / 2.0;
+    let target = engine::normalize_thermostat_target(target);
     let tolerance_mode = if zone.effective_mode.is_empty() {
         zone.mode.as_str()
     } else {

src/engine/automations.rs

@@ -868,7 +868,7 @@ async fn apply_flow_zone_action(state: &AppState, zone_id: &str, preset: Option<
         "auto" => { zone.manual_preset = None; zone.manual_setpoint = None; zone.manual_override_until = None; }
         "custom" => {
             let target = action.target_temperature.ok_or_else(|| AppError::BadRequest("Flow custom thermostat action has no target".into()))?;
-            zone.manual_preset = Some("custom".into()); zone.manual_setpoint = Some((target.clamp(8.0,30.0)*2.0).round()/2.0);
+            zone.manual_preset = Some("custom".into()); zone.manual_setpoint = Some(normalize_thermostat_target(target.clamp(8.0, 30.0)));
             zone.manual_override_until = next_schedule_boundary_utc(&zone.id, &state.db.list_schedules()?, Local::now());
         }
         value @ ("comfort" | "sleep" | "away") => {

src/engine/targets.rs

@@ -1,3 +1,7 @@
+pub(crate) fn normalize_thermostat_target(value: f64) -> f64 {
+    (value * 10.0).round() / 10.0
+}
+
 fn profile_setpoint(zone: &Zone, preset: &str, mode: &str) -> f64 {
     if zone.profile_version == 0 && preset == "comfort" {
         return zone.setpoint;

src/engine/tests.rs

@@ -3,6 +3,14 @@ mod tests {
     use super::*;
     use chrono::TimeZone;
 
+    #[test]
+    fn thermostat_target_normalization_preserves_tenths() {
+        assert!((normalize_thermostat_target(24.2) - 24.2).abs() < 1e-9);
+        assert!((normalize_thermostat_target(24.24) - 24.2).abs() < 1e-9);
+        assert!((normalize_thermostat_target(24.25) - 24.3).abs() < 1e-9);
+        assert!((normalize_thermostat_target(24.5) - 24.5).abs() < 1e-9);
+    }
+
     #[test]
     fn global_ha_sensor_stale_timeout_is_used_for_default_zone_value() {
         assert_eq!(effective_sensor_stale_after_seconds(300, 600), 600);

src/engine/zone_actions.rs

@@ -236,7 +236,7 @@ async fn apply_automatic_device_action(
         }
     }
     if let Some(target) = command.target_temperature {
-        zone.manual_setpoint = Some((target.clamp(8.0, 30.0) * 2.0).round() / 2.0);
+        zone.manual_setpoint = Some(normalize_thermostat_target(target.clamp(8.0, 30.0)));
         zone.manual_override_until =
             next_schedule_boundary_utc(&zone.id, &state.db.list_schedules()?, Local::now());
         domain_changed = true;