diff --git a/extendedSample/src/androidTest/java/info/mqtt/android/extsample/activity/KeyEvent.kt b/extendedSample/src/androidTest/java/info/mqtt/android/extsample/activity/KeyEvent.kt
new file mode 100644
index 00000000..1403bfbc
--- /dev/null
+++ b/extendedSample/src/androidTest/java/info/mqtt/android/extsample/activity/KeyEvent.kt
@@ -0,0 +1,7 @@
+package info.mqtt.android.extsample.activity
+
+// https://github.com/hannesa2/paho.mqtt.android/issues/604#issue-2236895469
+enum class KeyEvent(val eventKey: Int) {
+    SLEEP(223),
+    AWAKE(224)
+}
diff --git a/extendedSample/src/androidTest/java/info/mqtt/android/extsample/activity/LongRunningSleepMode.kt b/extendedSample/src/androidTest/java/info/mqtt/android/extsample/activity/LongRunningSleepMode.kt
new file mode 100644
index 00000000..72d14acc
--- /dev/null
+++ b/extendedSample/src/androidTest/java/info/mqtt/android/extsample/activity/LongRunningSleepMode.kt
@@ -0,0 +1,161 @@
+package info.mqtt.android.extsample.activity
+
+import android.app.UiAutomation
+import android.os.Build
+import android.view.Gravity
+import androidx.test.core.graphics.writeToTestStorage
+import androidx.test.espresso.Espresso.onView
+import androidx.test.espresso.action.ViewActions.click
+import androidx.test.espresso.action.ViewActions.replaceText
+import androidx.test.espresso.action.ViewActions.typeText
+import androidx.test.espresso.assertion.ViewAssertions.matches
+import androidx.test.espresso.contrib.DrawerActions
+import androidx.test.espresso.contrib.DrawerMatchers.isClosed
+import androidx.test.espresso.matcher.ViewMatchers
+import androidx.test.espresso.matcher.ViewMatchers.withId
+import androidx.test.espresso.matcher.ViewMatchers.withText
+import androidx.test.espresso.screenshot.captureToBitmap
+import androidx.test.ext.junit.rules.activityScenarioRule
+import androidx.test.ext.junit.runners.AndroidJUnit4
+import androidx.test.platform.app.InstrumentationRegistry
+import com.moka.lib.assertions.WaitingAssertion
+import info.mqtt.android.extsample.MainActivity
+import info.mqtt.android.extsample.R
+import org.junit.Before
+import org.junit.Rule
+import org.junit.Test
+import org.junit.rules.TestName
+import org.junit.runner.RunWith
+import timber.log.Timber
+import java.io.FileInputStream
+import java.io.IOException
+import java.io.InputStream
+import java.lang.Thread.sleep
+import java.util.Locale
+
+
+@RunWith(AndroidJUnit4::class)
+class LongRunningSleepMode {
+
+    // a handy JUnit rule that stores the method name, so it can be used to generate unique screenshot files per test method
+    @get:Rule
+    var nameRule = TestName()
+
+    @get:Rule
+    val activityScenarioRule = activityScenarioRule<MainActivity>()
+
+    @Before
+    fun setUp() {
+    }
+
+    @Test
+    fun connectWaitAndPublish() {
+        onView(withId(R.id.drawer_layout))
+            .check(matches(isClosed(Gravity.LEFT))) // Left Drawer should be closed.
+            .perform(DrawerActions.open())
+        onView(withId(R.id.action_add_connection)).perform(click())
+        onView(withId(R.id.action_save_connection)).perform(click())
+
+        onView(ViewMatchers.isRoot())
+            .captureToBitmap()
+            .writeToTestStorage("${javaClass.simpleName}_${nameRule.methodName}-AddConnect")
+
+        onView(withId(R.id.disConnectSwitch)).perform(click())
+        onView(withId(3)).perform(click())
+        // onView(withTagValue(`is`("Subscribe" as Any))).perform(click())
+
+        onView(withId(R.id.subscribe_button)).perform(click())
+        onView(withId(R.id.subscription_topic_edit_text)).perform(typeText(TOPIC))
+        onView(ViewMatchers.isRoot())
+            .captureToBitmap()
+            .writeToTestStorage("${javaClass.simpleName}_${nameRule.methodName}-Subscribe")
+        onView(withText("OK")).perform(click())
+
+        // Now send device to sleep
+        Timber.i("Send device to sleep")
+        sendKeyEvent(KeyEvent.SLEEP)
+        Timber.i("wait ${WAIT_SECONDS}")
+        sleep(1000 * WAIT_SECONDS)
+        sendKeyEvent(KeyEvent.AWAKE)
+        Timber.i("Awake device")
+
+        onView(withId(2)).perform(click())
+        onView(withId(R.id.topic)).perform(replaceText(TOPIC))
+        onView(withId(R.id.message)).perform(replaceText("msg"))
+        onView(ViewMatchers.isRoot())
+            .captureToBitmap()
+            .writeToTestStorage("${javaClass.simpleName}_${nameRule.methodName}-publish")
+        onView(withId(R.id.publish_button)).perform(click())
+
+        onView(withId(1)).perform(click())
+
+        WaitingAssertion.checkAssertion(R.id.history_list_view, Matchers.withListSizeBigger(0), 2500)
+        onView(ViewMatchers.isRoot())
+            .captureToBitmap()
+            .writeToTestStorage("${javaClass.simpleName}_${nameRule.methodName}-End")
+    }
+
+    // Source:
+    // https://github.com/facebook/screenshot-tests-for-android/blob/main/core/src/main/java/com/facebook/testing/screenshot/internal/Registry.java
+    private fun sendKeyEvent(event: KeyEvent) {
+        if (Build.VERSION.SDK_INT < 23) {
+            return
+        }
+        val command = String.format(Locale.ENGLISH, "adb shell input keyevent %s", event.eventKey)
+
+//        Timber.d("event=${event.name} cmd='$command'")
+//        try {
+//            val proc = Runtime.getRuntime().exec(arrayOf(command))
+//            var line: String?
+//
+//            val stderr = proc.errorStream
+//            val esr = InputStreamReader(stderr)
+//            val ebr = BufferedReader(esr)
+//            while ((ebr.readLine().also { line = it }) != null) Timber.e("FXN-BOOTCLASSPATH", line!!)
+//
+//            val stdout = proc.inputStream
+//            val osr = InputStreamReader(stdout)
+//            val obr = BufferedReader(osr)
+//            while ((obr.readLine().also { line = it }) != null) Timber.i("FXN-BOOTCLASSPATH", line!!)
+//
+//            val exitVal = proc.waitFor()
+//            Timber.d("FXN-BOOTCLASSPATH", "getprop exitValue: $exitVal")
+//        } catch (e: Exception) {
+//            Timber.e(e)
+//        }
+
+        Timber.d("event=${event.name} cmd='$command'")
+        val automation: UiAutomation = InstrumentationRegistry.getInstrumentation().uiAutomation
+        val fileDescriptor = automation.executeShellCommand(command)
+        val stream: InputStream = FileInputStream(fileDescriptor.fileDescriptor)
+        try {
+            val buffer = ByteArray(1024)
+            Timber.d("start")
+            while (stream.read(buffer) != -1) {
+                Timber.d("while")
+                // Consume stdout to ensure the command completes
+                Timber.v(buffer.toString())
+            }
+            Timber.d("done")
+        } catch (e: IOException) {
+            Timber.e(e)
+        } finally {
+            try {
+                stream.close()
+            } catch (e: IOException) {
+                Timber.e(e)
+            }
+            try {
+                fileDescriptor.close()
+            } catch (e: IOException) {
+                Timber.e(e)
+            }
+            Timber.d("finished")
+        }
+    }
+
+    companion object {
+        private const val TOPIC = "AnotherTest"
+        private const val WAIT_SECONDS = 60L
+    }
+}