SetClockJob: Actually update the time, rather than blinking an LED.

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

@@ -32,3 +32,4 @@ val VIBRA_CHARACTERISTIC_UUID = UUID.fromString("4223020f-2342-2342-2342-2342234
 val ROCKETS_CHARACTERISTIC_UUID = UUID.fromString("42230210-2342-2342-2342-234223422342")
 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/background/SetClockJob.kt

@@ -30,7 +30,8 @@ import android.content.Context
 import androidx.work.Worker
 import androidx.work.WorkerParameters
 import de.ccc.events.badge.card10.CARD10_SERVICE_UUID
-import de.ccc.events.badge.card10.ROCKETS_CHARACTERISTIC_UUID
+import de.ccc.events.badge.card10.TIME_CHARACTERISTIC_UUID
+import java.nio.ByteBuffer
 import java.util.concurrent.CountDownLatch
 import java.util.concurrent.TimeUnit
 
@@ -45,7 +46,7 @@ class SetClockJob(context: Context, workerParameters: WorkerParameters) : Worker
             try {
                 val gattLatch = CountDownLatch(1);
                 var writeLatch: CountDownLatch? = null
-                var rocketsCharacteristic: BluetoothGattCharacteristic? = null
+                var timeCharacteristic: BluetoothGattCharacteristic? = null
                 val callback = object : BluetoothGattCallback() {
                     override fun onConnectionStateChange(gatt: BluetoothGatt, status: Int, newState: Int) {
                         System.out.println("=== doWork() onConnectionStateChange " + gatt + " / " + status + " / " + newState)
@@ -56,7 +57,7 @@ class SetClockJob(context: Context, workerParameters: WorkerParameters) : Worker
                     override fun onServicesDiscovered(gatt: BluetoothGatt, status: Int) {
                         System.out.println("=== doWork() onServicesDiscovered " + gatt + " / " + status)
                         val card10Service = gatt.getService(CARD10_SERVICE_UUID)
-                        rocketsCharacteristic = card10Service.getCharacteristic(ROCKETS_CHARACTERISTIC_UUID)
+                        timeCharacteristic = card10Service.getCharacteristic(TIME_CHARACTERISTIC_UUID)
                         gattLatch.countDown()
                     }
 
@@ -72,24 +73,14 @@ class SetClockJob(context: Context, workerParameters: WorkerParameters) : Worker
                 if (!gattLatch.await(1, TimeUnit.MINUTES))
                     return Result.retry()
 
-                // TODO at this point update the clock, rather than blinking the LED
-
-                rocketsCharacteristic?.value = ubyteArrayOf(0xffu, 0x00u, 0x00u).toByteArray()
-                if (gatt.writeCharacteristic(rocketsCharacteristic)) {
-                    writeLatch = CountDownLatch(1)
-                    if (!writeLatch.await(1, TimeUnit.MINUTES))
-                        return Result.failure()
-                    System.out.println("=== doWork() rocket flash on")
-                }
-
-                Thread.sleep(1000)
-
-                rocketsCharacteristic?.value = ubyteArrayOf(0x00u, 0x00u, 0x00u).toByteArray()
-                if (gatt.writeCharacteristic(rocketsCharacteristic)) {
+                val buffer = ByteBuffer.allocate(8)
+                buffer.putLong(System.currentTimeMillis())
+                timeCharacteristic?.value = buffer.array()
+                if (gatt.writeCharacteristic(timeCharacteristic)) {
                     writeLatch = CountDownLatch(1)
                     if (!writeLatch.await(1, TimeUnit.MINUTES))
                         return Result.failure()
-                    System.out.println("=== doWork() rocket flash off")
+                    System.out.println("=== doWork() updated time")
                 }
             } catch (x: Exception) {
                 x.printStackTrace()