Implement load test on the "beautiful LEDs".

app/src/main/java/de/ccc/events/badge/card10/Constants.kt

@@ -32,6 +32,7 @@ val DEVICE_NAME_CHARACTERISTIC_UUID = UUID.fromString("00002a00-0000-1000-8000-0
 val CARD10_SERVICE_UUID = UUID.fromString("42230200-2342-2342-2342-234223422342")
 val VIBRA_CHARACTERISTIC_UUID = UUID.fromString("4223020f-2342-2342-2342-234223422342")
 val ROCKETS_CHARACTERISTIC_UUID = UUID.fromString("42230210-2342-2342-2342-234223422342")
+val LEDS_ABOVE_CHARACTERISTIC_UUID = UUID.fromString("42230220-2342-2342-2342-234223422342")
 val SINGLE_LED_CHARACTERISTIC_UUID = UUID.fromString("42230211-2342-2342-2342-234223422342")
 val LIGHT_SENSOR_CHARACTERISTIC_UUID = UUID.fromString("422302f0-2342-2342-2342-234223422342")
 val TIME_CHARACTERISTIC_UUID = UUID.fromString("42230201-2342-2342-2342-234223422342")

app/src/main/java/de/ccc/events/badge/card10/main/MainFragment.kt

@@ -36,6 +36,7 @@ import de.ccc.events.badge.card10.common.ConnectionService
 import de.ccc.events.badge.card10.hatchery.AppListFragment
 import de.ccc.events.badge.card10.mood.MoodFragment
 import de.ccc.events.badge.card10.scanner.ScannerFragment
+import de.ccc.events.badge.card10.sparkle.BeautifulFragment
 import kotlinx.android.synthetic.main.main_fragment.*
 
 class MainFragment : Fragment() {
@@ -64,6 +65,7 @@ class MainFragment : Fragment() {
 
         button_pair.setOnClickListener { startFragment(ScannerFragment()) }
         button_mood.setOnClickListener { startFragment(MoodFragment()) }
+        button_beautiful.setOnClickListener { startFragment(BeautifulFragment()) }
         button_hatchery.setOnClickListener { startFragment(AppListFragment()) }
     }
 

app/src/main/java/de/ccc/events/badge/card10/sparkle/BeautifulFragment.kt

+/*
+ * Copyright by the original author or authors.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package de.ccc.events.badge.card10.sparkle
+
+import android.bluetooth.*
+import android.os.Bundle
+import android.os.Handler
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import androidx.fragment.app.Fragment
+import de.ccc.events.badge.card10.CARD10_BLUETOOTH_MAC_PREFIX
+import de.ccc.events.badge.card10.CARD10_SERVICE_UUID
+import de.ccc.events.badge.card10.LEDS_ABOVE_CHARACTERISTIC_UUID
+import de.ccc.events.badge.card10.R
+import java.util.concurrent.CountDownLatch
+import kotlin.random.Random
+
+class BeautifulFragment : Fragment(), Runnable {
+
+    private val bluetoothAdapter = BluetoothAdapter.getDefaultAdapter()
+    private lateinit var gatt: BluetoothGatt
+    private var ledsAboveCharacteristic: BluetoothGattCharacteristic? = null
+    private @Volatile var writeLatch: CountDownLatch? = null
+    private val handler = Handler()
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+
+        val callback = object : BluetoothGattCallback() {
+            override fun onConnectionStateChange(gatt: BluetoothGatt, status: Int, newState: Int) {
+                println("===== onConnectionStateChange ${gatt} ${if (status == BluetoothGatt.GATT_SUCCESS) "SUCCESS" else status} ${if (newState == BluetoothProfile.STATE_CONNECTED) "CONNECTED" else if (newState == BluetoothProfile.STATE_DISCONNECTED) "DISCONNECTED" else newState}")
+                if (newState == BluetoothGatt.STATE_CONNECTED)
+                    gatt.requestMtu(64)
+            }
+
+            override fun onMtuChanged(gatt: BluetoothGatt, mtu: Int, status: Int) {
+                println("===== onMtuChanged ${gatt} ${if (status == BluetoothGatt.GATT_SUCCESS) "SUCCESS" else status} ${mtu}")
+                gatt.discoverServices()
+            }
+
+            override fun onServicesDiscovered(gatt: BluetoothGatt, status: Int) {
+                println("===== onServicesDiscovered ${gatt} ${if (status == BluetoothGatt.GATT_SUCCESS) "SUCCESS" else status}")
+                val card10Service = gatt.getService(CARD10_SERVICE_UUID)
+                ledsAboveCharacteristic = card10Service.getCharacteristic(LEDS_ABOVE_CHARACTERISTIC_UUID)
+                handler.post(this@BeautifulFragment)
+            }
+
+            override fun onCharacteristicWrite(
+                gatt: BluetoothGatt,
+                characteristic: BluetoothGattCharacteristic,
+                status: Int
+            ) {
+                println("=== onCharacteristicWrite ${gatt} ${if (status == BluetoothGatt.GATT_SUCCESS) "SUCCESS" else status} ${characteristic.uuid} ${characteristic.value}")
+                writeLatch?.countDown();
+            }
+        }
+
+        val remoteDevices =
+            bluetoothAdapter.bondedDevices.filter { it.address.startsWith(CARD10_BLUETOOTH_MAC_PREFIX, true) }
+        if (remoteDevices.isEmpty())
+            activity!!.finish()
+        gatt = remoteDevices.get(0).connectGatt(activity, false, callback)
+    }
+
+    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
+        return inflater.inflate(R.layout.beautiful_fragment, container, false)
+    }
+
+    override fun run() {
+        ledsAboveCharacteristic!!.value = Random.nextBytes(33);
+        writeLatch = CountDownLatch(1)
+        val init = gatt.writeCharacteristic(ledsAboveCharacteristic)
+        if (!init)
+            println("=== Failed to initiate writing GATT attribute")
+        writeLatch!!.await();
+        handler.postDelayed(this, 100)
+    }
+
+    override fun onDestroy() {
+        handler.removeCallbacksAndMessages(null)
+        gatt.close();
+        super.onDestroy()
+    }
+}

app/src/main/res/layout/beautiful_fragment.xml

+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+                                                   xmlns:app="http://schemas.android.com/apk/res-auto"
+                                                   android:layout_width="match_parent"
+                                                   android:layout_height="match_parent"
+                                                   android:padding="@dimen/activity_padding">
+    <TextView android:layout_width="wrap_content" android:layout_height="wrap_content"
+              android:text="Sparkling your LEDs, press back to stop…"
+              android:layout_marginTop="8dp"
+              app:layout_constraintTop_toTopOf="parent" android:layout_marginBottom="8dp"
+              app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintStart_toStartOf="parent"
+              android:layout_marginStart="8dp" app:layout_constraintEnd_toEndOf="parent"
+              android:layout_marginEnd="8dp"/>
+</androidx.constraintlayout.widget.ConstraintLayout>

app/src/main/res/layout/main_fragment.xml

@@ -54,11 +54,22 @@
                 android:layout_marginTop="@dimen/main_label_margin"
                 android:id="@+id/button_mood"
                 android:text="@string/main_button_mood"
+                app:layout_constraintTop_toTopOf="parent"
                 app:layout_constraintBottom_toBottomOf="parent"
                 app:layout_constraintLeft_toLeftOf="parent"
                 app:layout_constraintRight_toRightOf="parent"
         />
 
+        <Button android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="@dimen/main_label_margin"
+                android:id="@+id/button_beautiful"
+                android:text="Beautiful"
+                app:layout_constraintTop_toBottomOf="@id/button_mood"
+                app:layout_constraintBottom_toBottomOf="parent"
+                app:layout_constraintLeft_toLeftOf="parent"
+                app:layout_constraintRight_toRightOf="parent"
+        />
     </androidx.constraintlayout.widget.ConstraintLayout>
 
     <androidx.constraintlayout.widget.ConstraintLayout android:layout_width="match_parent"