diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2c7ea2f..5a1dad9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -19,6 +19,7 @@
 ### Removed
 
 ### Fixed
+- Fix a problem with rsocket endpoint with no filter.
 
 ### Security
 
diff --git a/build.gradle.kts b/build.gradle.kts
index 0f00407..6423c3c 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -7,7 +7,7 @@ plugins {
 
 allprojects {
     group = "space.kscience"
-    version = "0.4.0-dev-2"
+    version = "0.4.0-dev-3"
     repositories{
         maven("https://maven.pkg.jetbrains.space/spc/p/sci/dev")
     }
diff --git a/controls-magix/build.gradle.kts b/controls-magix/build.gradle.kts
index ef4a3af..ea03a7e 100644
--- a/controls-magix/build.gradle.kts
+++ b/controls-magix/build.gradle.kts
@@ -17,6 +17,7 @@ kscience {
     useSerialization {
         json()
     }
+
     commonMain {
         api(projects.magix.magixApi)
         api(projects.controlsCore)
@@ -25,6 +26,11 @@ kscience {
 
     jvmTest{
         implementation(spclibs.logback.classic)
+        implementation(projects.magix.magixServer)
+        implementation(projects.magix.magixRsocket)
+        implementation(spclibs.ktor.server.cio)
+        implementation(spclibs.ktor.server.websockets)
+        implementation(spclibs.ktor.client.cio)
     }
 }
 
diff --git a/controls-magix/src/jvmTest/kotlin/space/kscience/controls/client/MagixLoopTest.kt b/controls-magix/src/jvmTest/kotlin/space/kscience/controls/client/MagixLoopTest.kt
new file mode 100644
index 0000000..764dcad
--- /dev/null
+++ b/controls-magix/src/jvmTest/kotlin/space/kscience/controls/client/MagixLoopTest.kt
@@ -0,0 +1,60 @@
+package space.kscience.controls.client
+
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.delay
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.test.runTest
+import kotlinx.coroutines.withContext
+import space.kscience.controls.client.RemoteDeviceConnect.TestDevice
+import space.kscience.controls.manager.DeviceManager
+import space.kscience.controls.manager.install
+import space.kscience.dataforge.context.Context
+import space.kscience.dataforge.context.request
+import space.kscience.magix.api.MagixEndpoint
+import space.kscience.magix.rsocket.rSocketWithWebSockets
+import space.kscience.magix.server.startMagixServer
+import kotlin.test.Test
+import kotlin.test.assertEquals
+
+class MagixLoopTest {
+
+    @Test
+    fun deviceHub() = runTest {
+        val context = Context {
+            plugin(DeviceManager)
+        }
+
+        val server = context.startMagixServer()
+
+        val deviceManager = context.request(DeviceManager)
+
+        val deviceEndpoint = MagixEndpoint.rSocketWithWebSockets("localhost")
+
+//        deviceEndpoint.subscribe().onEach {
+//            println(it)
+//        }.launchIn(this)
+
+        deviceManager.launchMagixService(deviceEndpoint, "device")
+
+        launch {
+            delay(50)
+            repeat(10) {
+                deviceManager.install("test[$it]", TestDevice)
+            }
+        }
+
+        val clientEndpoint = MagixEndpoint.rSocketWithWebSockets("localhost")
+
+        val remoteHub = clientEndpoint.remoteDeviceHub(context, "client", "device")
+
+        assertEquals(0, remoteHub.devices.size)
+
+        delay(60)
+        //switch context to use actual delay
+        withContext(Dispatchers.Default) {
+            clientEndpoint.requestDeviceUpdate("client", "device")
+            delay(60)
+            assertEquals(10, remoteHub.devices.size)
+        }
+    }
+}
\ No newline at end of file
diff --git a/magix/magix-server/src/jvmMain/kotlin/space/kscience/magix/server/RSocketMagixFlowPlugin.kt b/magix/magix-server/src/jvmMain/kotlin/space/kscience/magix/server/RSocketMagixFlowPlugin.kt
index a00c33f..699a281 100644
--- a/magix/magix-server/src/jvmMain/kotlin/space/kscience/magix/server/RSocketMagixFlowPlugin.kt
+++ b/magix/magix-server/src/jvmMain/kotlin/space/kscience/magix/server/RSocketMagixFlowPlugin.kt
@@ -59,9 +59,12 @@ public class RSocketMagixFlowPlugin(
             RSocketRequestHandler(coroutineScope.coroutineContext) {
                 //handler for request/stream
                 requestStream { request: Payload ->
-                    val filter = MagixEndpoint.magixJson.decodeFromString(
+                    val requestText = request.data.readText()
+                    val filter = if(requestText.isBlank()) {
+                        MagixMessageFilter.ALL
+                    } else  MagixEndpoint.magixJson.decodeFromString(
                         MagixMessageFilter.serializer(),
-                        request.data.readText()
+                        requestText
                     )
 
                     receive.filter(filter).map { message ->
@@ -89,12 +92,12 @@ public class RSocketMagixFlowPlugin(
                         )
                     }.launchIn(this)
 
-                    val filterText = request.use { it.data.readText() }
+                    val filterText = request.data.readText()
 
-                    val filter = if (filterText.isNotBlank()) {
-                        MagixEndpoint.magixJson.decodeFromString(MagixMessageFilter.serializer(), filterText)
+                    val filter = if (filterText.isBlank()) {
+                        MagixMessageFilter.ALL
                     } else {
-                        MagixMessageFilter()
+                        MagixEndpoint.magixJson.decodeFromString(MagixMessageFilter.serializer(), filterText)
                     }
 
                     receive.filter(filter).map { message ->