diff --git a/controls-constructor/src/commonMain/kotlin/space/kscience/controls/constructor/DeviceConstructor.kt b/controls-constructor/src/commonMain/kotlin/space/kscience/controls/constructor/DeviceConstructor.kt
index 820f6ef..63b5303 100644
--- a/controls-constructor/src/commonMain/kotlin/space/kscience/controls/constructor/DeviceConstructor.kt
+++ b/controls-constructor/src/commonMain/kotlin/space/kscience/controls/constructor/DeviceConstructor.kt
@@ -54,7 +54,7 @@ public abstract class DeviceConstructor(
     /**
      * Register a property and provide a direct reader for it
      */
-    public fun <T : Any, S: DeviceState<T>> property(
+    public fun <T, S: DeviceState<T>> property(
         state: S,
         descriptorBuilder: PropertyDescriptor.() -> Unit = {},
         nameOverride: String? = null,
@@ -104,7 +104,7 @@ public abstract class DeviceConstructor(
     /**
      * Create and register a virtual mutable property with optional [callback]
      */
-    public fun <T : Any> virtualProperty(
+    public fun <T> virtualProperty(
         metaConverter: MetaConverter<T>,
         initialState: T,
         descriptorBuilder: PropertyDescriptor.() -> Unit = {},
diff --git a/controls-constructor/src/commonMain/kotlin/space/kscience/controls/constructor/DeviceGroup.kt b/controls-constructor/src/commonMain/kotlin/space/kscience/controls/constructor/DeviceGroup.kt
index 6cdb784..ca05c27 100644
--- a/controls-constructor/src/commonMain/kotlin/space/kscience/controls/constructor/DeviceGroup.kt
+++ b/controls-constructor/src/commonMain/kotlin/space/kscience/controls/constructor/DeviceGroup.kt
@@ -28,7 +28,7 @@ public open class DeviceGroup(
 ) : DeviceHub, CachingDevice {
 
     internal class Property(
-        val state: DeviceState<out Any>,
+        val state: DeviceState<*>,
         val descriptor: PropertyDescriptor,
     )
 
@@ -82,7 +82,7 @@ public open class DeviceGroup(
     /**
      * Register a new property based on [DeviceState]. Properties could be modified dynamically
      */
-    public fun registerProperty(descriptor: PropertyDescriptor, state: DeviceState<out Any>) {
+    public fun registerProperty(descriptor: PropertyDescriptor, state: DeviceState<*>) {
         val name = descriptor.name.parseAsName()
         require(properties[name] == null) { "Can't add property with name $name. It already exists." }
         properties[name] = Property(state, descriptor)
diff --git a/controls-constructor/src/commonMain/kotlin/space/kscience/controls/constructor/DeviceState.kt b/controls-constructor/src/commonMain/kotlin/space/kscience/controls/constructor/DeviceState.kt
index 1219210..faa7b2f 100644
--- a/controls-constructor/src/commonMain/kotlin/space/kscience/controls/constructor/DeviceState.kt
+++ b/controls-constructor/src/commonMain/kotlin/space/kscience/controls/constructor/DeviceState.kt
@@ -50,7 +50,7 @@ public operator fun <T> MutableDeviceState<T>.setValue(thisRef: Any?, property:
     this.value = value
 }
 
-public var <T : Any> MutableDeviceState<T>.valueAsMeta: Meta
+public var <T> MutableDeviceState<T>.valueAsMeta: Meta
     get() = converter.convert(value)
     set(arg) {
         value = converter.read(arg)
diff --git a/controls-vision/src/commonMain/kotlin/plotExtensions.kt b/controls-vision/src/commonMain/kotlin/plotExtensions.kt
index 4cfa49b..804fe9d 100644
--- a/controls-vision/src/commonMain/kotlin/plotExtensions.kt
+++ b/controls-vision/src/commonMain/kotlin/plotExtensions.kt
@@ -184,18 +184,16 @@ public fun Plot.plotBooleanState(
 private fun <T> Flow<T>.chunkedByPeriod(duration: Duration): Flow<List<T>> {
     val collector: ArrayDeque<T> = ArrayDeque<T>()
     return channelFlow {
-        coroutineScope {
-            launch {
-                while (isActive) {
-                    delay(duration)
-                    send(ArrayList(collector))
-                    collector.clear()
-                }
-            }
-            this@chunkedByPeriod.collect {
-                collector.add(it)
+        launch {
+            while (isActive) {
+                delay(duration)
+                send(ArrayList(collector))
+                collector.clear()
             }
         }
+        this@chunkedByPeriod.collect {
+            collector.add(it)
+        }
     }
 }
 
@@ -224,7 +222,7 @@ public fun Plot.plotAveragedDeviceProperty(
 ): Job = scatter(configuration).run {
     val data = TimeData()
     device.propertyMessageFlow(propertyName).chunkedByPeriod(averagingInterval).transform { eventList ->
-        if(eventList.isEmpty()){
+        if (eventList.isEmpty()) {
             data.append(Clock.System.now(), missingValue.asValue())
         } else {
             val time = eventList.map { it.time }.averageTime()