diff --git a/services/mill/wifi.go b/services/mill/wifi.go
index 33f4db8..8194667 100644
--- a/services/mill/wifi.go
+++ b/services/mill/wifi.go
@@ -20,7 +20,8 @@ type WifiBridge struct {
 	ID string
 	IP string
 
-	state *device.State
+	state        *device.State
+	desiredState device.State
 
 	mx      sync.Mutex
 	started bool
@@ -36,6 +37,8 @@ func (w *WifiBridge) SetState(id string, state device.State) bool {
 		return false
 	}
 
+	w.desiredState = state
+
 	return true
 }
 
@@ -93,9 +96,7 @@ func (w *WifiBridge) refresh() error {
 		})
 	}
 
-	w.state.Temperature = gentools.Ptr(*w.state.Temperature - math.Mod(*w.state.Temperature, 0.5))
-
-	if math.Abs(temp-*w.state.Temperature) >= 0.1 {
+	if w.desiredState.Temperature != nil && math.Abs(temp-*w.desiredState.Temperature) >= 0.1 {
 		if err := w.writeTemperature(); err != nil {
 			return err
 		}