package nodomain.freeyourgadget.gadgetbridge.miband; import android.bluetooth.BluetoothGatt; import android.bluetooth.BluetoothGattCharacteristic; import android.content.SharedPreferences; import android.database.sqlite.SQLiteDatabase; import android.net.Uri; import android.preference.PreferenceManager; import android.widget.Toast; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import java.io.IOException; import java.text.DateFormat; import java.util.ArrayList; import java.util.Arrays; import java.util.Calendar; import java.util.GregorianCalendar; import java.util.UUID; import nodomain.freeyourgadget.gadgetbridge.GBActivitySample; import nodomain.freeyourgadget.gadgetbridge.GBAlarm; import nodomain.freeyourgadget.gadgetbridge.GBApplication; import nodomain.freeyourgadget.gadgetbridge.GBCommand; import nodomain.freeyourgadget.gadgetbridge.GBDevice.State; import nodomain.freeyourgadget.gadgetbridge.R; import nodomain.freeyourgadget.gadgetbridge.btle.AbortTransactionAction; import nodomain.freeyourgadget.gadgetbridge.btle.AbstractBTLEDeviceSupport; import nodomain.freeyourgadget.gadgetbridge.btle.BtLEAction; import nodomain.freeyourgadget.gadgetbridge.btle.SetDeviceBusyAction; import nodomain.freeyourgadget.gadgetbridge.btle.TransactionBuilder; import nodomain.freeyourgadget.gadgetbridge.database.ActivityDatabaseHandler; import static nodomain.freeyourgadget.gadgetbridge.miband.MiBandConst.DEFAULT_VALUE_FLASH_COLOUR; import static nodomain.freeyourgadget.gadgetbridge.miband.MiBandConst.DEFAULT_VALUE_FLASH_COUNT; import static nodomain.freeyourgadget.gadgetbridge.miband.MiBandConst.DEFAULT_VALUE_FLASH_DURATION; import static nodomain.freeyourgadget.gadgetbridge.miband.MiBandConst.DEFAULT_VALUE_FLASH_ORIGINAL_COLOUR; import static nodomain.freeyourgadget.gadgetbridge.miband.MiBandConst.DEFAULT_VALUE_VIBRATION_COUNT; import static nodomain.freeyourgadget.gadgetbridge.miband.MiBandConst.DEFAULT_VALUE_VIBRATION_DURATION; import static nodomain.freeyourgadget.gadgetbridge.miband.MiBandConst.DEFAULT_VALUE_VIBRATION_PAUSE; import static nodomain.freeyourgadget.gadgetbridge.miband.MiBandConst.DEFAULT_VALUE_VIBRATION_PROFILE; import static nodomain.freeyourgadget.gadgetbridge.miband.MiBandConst.FLASH_COLOUR; import static nodomain.freeyourgadget.gadgetbridge.miband.MiBandConst.FLASH_COUNT; import static nodomain.freeyourgadget.gadgetbridge.miband.MiBandConst.FLASH_DURATION; import static nodomain.freeyourgadget.gadgetbridge.miband.MiBandConst.FLASH_ORIGINAL_COLOUR; import static nodomain.freeyourgadget.gadgetbridge.miband.MiBandConst.ORIGIN_GENERIC; import static nodomain.freeyourgadget.gadgetbridge.miband.MiBandConst.ORIGIN_K9MAIL; import static nodomain.freeyourgadget.gadgetbridge.miband.MiBandConst.ORIGIN_SMS; import static nodomain.freeyourgadget.gadgetbridge.miband.MiBandConst.VIBRATION_COUNT; import static nodomain.freeyourgadget.gadgetbridge.miband.MiBandConst.VIBRATION_DURATION; import static nodomain.freeyourgadget.gadgetbridge.miband.MiBandConst.VIBRATION_PAUSE; import static nodomain.freeyourgadget.gadgetbridge.miband.MiBandConst.VIBRATION_PROFILE; import static nodomain.freeyourgadget.gadgetbridge.miband.MiBandConst.getNotificationPrefIntValue; import static nodomain.freeyourgadget.gadgetbridge.miband.MiBandConst.getNotificationPrefStringValue; public class MiBandSupport extends AbstractBTLEDeviceSupport { private static final Logger LOG = LoggerFactory.getLogger(MiBandSupport.class); //temporary buffer, size is a multiple of 60 because we want to store complete minutes (1 minute = 3 bytes) private static final int activityDataHolderSize = 60; // 20min private byte[] activityDataHolder = new byte[activityDataHolderSize]; //index of the buffer above private int activityDataHolderProgress = 0; //number of bytes we will get in a single data transfer, used as counter private int activityDataRemainingBytes = 0; //same as above, but remains untouched for the ack message private int activityDataUntilNextHeader = 0; //timestamp of the single data transfer, incremented to store each minute's data private GregorianCalendar activityDataTimestampProgress = null; //same as above, but remains untouched for the ack message private GregorianCalendar activityDataTimestampToAck = null; private volatile boolean telephoneRinging; private volatile boolean isLocatingDevice; public MiBandSupport() { addSupportedService(MiBandService.UUID_SERVICE_MIBAND_SERVICE); } @Override protected TransactionBuilder initializeDevice(TransactionBuilder builder) { builder.add(new SetDeviceStateAction(getDevice(), State.INITIALIZING, getContext())); pair(builder) .sendUserInfo(builder) .enableNotifications(builder, true) .setCurrentTime(builder) .requestBatteryInfo(builder) .setInitialized(builder); return builder; } /** * Last action of initialization sequence. Sets the device to initialized. * It is only invoked if all other actions were successfully run, so the device * must be initialized, then. * * @param builder */ private void setInitialized(TransactionBuilder builder) { builder.add(new SetDeviceStateAction(getDevice(), State.INITIALIZED, getContext())); } // TODO: tear down the notifications on quit private MiBandSupport enableNotifications(TransactionBuilder builder, boolean enable) { builder.notify(getCharacteristic(MiBandService.UUID_CHARACTERISTIC_NOTIFICATION), enable) .notify(getCharacteristic(MiBandService.UUID_CHARACTERISTIC_REALTIME_STEPS), enable) .notify(getCharacteristic(MiBandService.UUID_CHARACTERISTIC_ACTIVITY_DATA), enable) .notify(getCharacteristic(MiBandService.UUID_CHARACTERISTIC_BATTERY), enable) .notify(getCharacteristic(MiBandService.UUID_CHARACTERISTIC_SENSOR_DATA), enable); return this; } @Override public boolean useAutoConnect() { return true; } @Override public void pair() { for (int i = 0; i < 5; i++) { if (connect()) { return; } } } private byte[] getDefaultNotification() { final int vibrateTimes = 1; final long vibrateDuration = 250l; final int flashTimes = 1; final int flashColour = 0xFFFFFFFF; final int originalColour = 0xFFFFFFFF; final long flashDuration = 250l; return getNotification(vibrateDuration, vibrateTimes, flashTimes, flashColour, originalColour, flashDuration); } private void sendDefaultNotification(TransactionBuilder builder, short repeat, BtLEAction extraAction) { BluetoothGattCharacteristic characteristic = getCharacteristic(MiBandService.UUID_CHARACTERISTIC_CONTROL_POINT); LOG.info("Sending notification to MiBand: " + characteristic + " (" + repeat + " times)"); byte[] defaultNotification = getDefaultNotification(); for (short i = 0; i < repeat; i++) { builder.write(characteristic, defaultNotification); builder.add(extraAction); } builder.queue(getQueue()); } /** * Sends a custom notification to the Mi Band. * * @param vibrationProfile specifies how and how often the Band shall vibrate. * @param extraAction an extra action to be executed after every vibration and flash sequence. Allows to abort the repetition, for example. * @param builder */ private void sendCustomNotification(VibrationProfile vibrationProfile, BtLEAction extraAction, TransactionBuilder builder) { BluetoothGattCharacteristic controlPoint = getCharacteristic(MiBandService.UUID_CHARACTERISTIC_CONTROL_POINT); int[] vibrationOnOffSequence = vibrationProfile.getVibrationOnOffSequence(); // first vibration, then flash LEDs for (short i = 0; i < vibrationProfile.getVibrationRepeat(); i++) { for (int j = 0; j < vibrationOnOffSequence.length; j++) { if (j < vibrationOnOffSequence.length) { int on = vibrationOnOffSequence[j]; on = Math.min(500, on); // longer than 500ms is not possible builder.write(controlPoint, startVibrate); builder.wait(on); builder.write(controlPoint, stopVibrate); if (++j < vibrationOnOffSequence.length) { int off = Math.max(vibrationOnOffSequence[j], 25); // wait at least 25ms builder.wait(off); } } if (extraAction != null) { builder.add(extraAction); } } } int[] colorOnOffSequence = vibrationProfile.getColorOnOffSequence(); for (short i = 0; i < vibrationProfile.getColorRepeat(); i++) { for (int j = 0; j < colorOnOffSequence.length; j++) { int color = colorOnOffSequence[j]; builder.write(controlPoint, getLEDFlash(color)); if (++j < colorOnOffSequence.length) { int on = colorOnOffSequence[j]; on = Math.min(500, on); // longer than 500ms is not possible builder.wait(on); if (++j < colorOnOffSequence.length) { int off = colorOnOffSequence[j]; if (off >= 300) { // shorter periods don't seem to work builder.write(controlPoint, getLEDFlash(LEDColors.OFF)); builder.wait(off); } } } if (extraAction != null) { builder.add(extraAction); } } } LOG.info("Sending notification to MiBand: " + controlPoint); builder.queue(getQueue()); } private void sendCustomNotification(int vibrateDuration, int vibrateTimes, int pause, int flashTimes, int flashColour, int originalColour, long flashDuration, TransactionBuilder builder) { BluetoothGattCharacteristic controlPoint = getCharacteristic(MiBandService.UUID_CHARACTERISTIC_CONTROL_POINT); int vDuration = Math.min(500, vibrateDuration); // longer than 500ms is not possible for (int i = 0; i < vibrateTimes; i++) { builder.write(controlPoint, startVibrate); builder.wait(vDuration); builder.write(controlPoint, stopVibrate); if (pause > 0) { builder.wait(pause); } } LOG.info("Sending notification to MiBand: " + controlPoint); builder.queue(getQueue()); } private static final byte[] startVibrate = new byte[]{MiBandService.COMMAND_SEND_NOTIFICATION, 0}; private static final byte[] stopVibrate = new byte[]{MiBandService.COMMAND_STOP_MOTOR_VIBRATE}; private static final byte[] reboot = new byte[]{MiBandService.COMMAND_REBOOT}; private static final byte[] fetch = new byte[]{MiBandService.COMMAND_FETCH_DATA}; private byte[] getNotification(long vibrateDuration, int vibrateTimes, int flashTimes, int flashColour, int originalColour, long flashDuration) { byte[] vibrate = new byte[]{MiBandService.COMMAND_SEND_NOTIFICATION, (byte) 1}; byte r = 6; byte g = 0; byte b = 6; boolean display = true; // byte[] flashColor = new byte[]{ 14, r, g, b, display ? (byte) 1 : (byte) 0 }; return vibrate; } private byte[] getLEDFlash(int color) { byte[] rgb = LEDColors.toBytes(color); return new byte[] { MiBandService.COMMAND_SET_LED_COLOR, rgb[0], rgb[1], rgb[2], 0x1 }; } /** * Part of device initialization process. Do not call manually. * * @param builder * @return */ private MiBandSupport sendUserInfo(TransactionBuilder builder) { LOG.debug("Writing User Info!"); BluetoothGattCharacteristic characteristic = getCharacteristic(MiBandService.UUID_CHARACTERISTIC_USER_INFO); builder.write(characteristic, MiBandCoordinator.getAnyUserInfo(getDevice().getAddress()).getData()); return this; } private MiBandSupport requestBatteryInfo(TransactionBuilder builder) { LOG.debug("Requesting Battery Info!"); BluetoothGattCharacteristic characteristic = getCharacteristic(MiBandService.UUID_CHARACTERISTIC_BATTERY); builder.read(characteristic); return this; } /** * Part of device initialization process. Do not call manually. * * @param transaction * @return */ private MiBandSupport pair(TransactionBuilder transaction) { LOG.info("Attempting to pair MI device..."); BluetoothGattCharacteristic characteristic = getCharacteristic(MiBandService.UUID_CHARACTERISTIC_PAIR); if (characteristic != null) { transaction.write(characteristic, new byte[]{2}); } else { LOG.info("Unable to pair MI device -- characteristic not available"); } return this; } private void performDefaultNotification(String task, short repeat, BtLEAction extraAction) { try { TransactionBuilder builder = performInitialized(task); sendDefaultNotification(builder, repeat, extraAction); } catch (IOException ex) { LOG.error("Unable to send notification to MI device", ex); } } // private void performCustomNotification(String task, int vibrateDuration, int vibrateTimes, int pause, int flashTimes, int flashColour, int originalColour, long flashDuration) { // try { // TransactionBuilder builder = performInitialized(task); // sendCustomNotification(vibrateDuration, vibrateTimes, pause, flashTimes, flashColour, originalColour, flashDuration, builder); // } catch (IOException ex) { // LOG.error("Unable to send notification to MI device", ex); // } // } private void performPreferredNotification(String task, String notificationOrigin, BtLEAction extraAction) { try { TransactionBuilder builder = performInitialized(task); SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(getContext()); int vibrateDuration = getPreferredVibrateDuration(notificationOrigin, prefs); int vibratePause = getPreferredVibratePause(notificationOrigin, prefs); int vibrateTimes = getPreferredVibrateCount(notificationOrigin, prefs); VibrationProfile profile = getPreferredVibrateProfile(notificationOrigin, prefs, vibrateTimes); sendCustomNotification(profile, extraAction, builder); // sendCustomNotification(vibrateDuration, vibrateTimes, vibratePause, flashTimes, flashColour, originalColour, flashDuration, builder); } catch (IOException ex) { LOG.error("Unable to send notification to MI device", ex); } } private int getPreferredFlashDuration(String notificationOrigin, SharedPreferences prefs) { return getNotificationPrefIntValue(FLASH_DURATION, notificationOrigin, prefs, DEFAULT_VALUE_FLASH_DURATION); } private int getPreferredOriginalColour(String notificationOrigin, SharedPreferences prefs) { return getNotificationPrefIntValue(FLASH_ORIGINAL_COLOUR, notificationOrigin, prefs, DEFAULT_VALUE_FLASH_ORIGINAL_COLOUR); } private int getPreferredFlashColour(String notificationOrigin, SharedPreferences prefs) { return getNotificationPrefIntValue(FLASH_COLOUR, notificationOrigin, prefs, DEFAULT_VALUE_FLASH_COLOUR); } private int getPreferredFlashCount(String notificationOrigin, SharedPreferences prefs) { return getNotificationPrefIntValue(FLASH_COUNT, notificationOrigin, prefs, DEFAULT_VALUE_FLASH_COUNT); } private int getPreferredVibratePause(String notificationOrigin, SharedPreferences prefs) { return getNotificationPrefIntValue(VIBRATION_PAUSE, notificationOrigin, prefs, DEFAULT_VALUE_VIBRATION_PAUSE); } private int getPreferredVibrateCount(String notificationOrigin, SharedPreferences prefs) { return getNotificationPrefIntValue(VIBRATION_COUNT, notificationOrigin, prefs, DEFAULT_VALUE_VIBRATION_COUNT); } private int getPreferredVibrateDuration(String notificationOrigin, SharedPreferences prefs) { return getNotificationPrefIntValue(VIBRATION_DURATION, notificationOrigin, prefs, DEFAULT_VALUE_VIBRATION_DURATION); } private VibrationProfile getPreferredVibrateProfile(String notificationOrigin, SharedPreferences prefs, int repeat) { String profileId = getNotificationPrefStringValue(VIBRATION_PROFILE, notificationOrigin, prefs, DEFAULT_VALUE_VIBRATION_PROFILE); return VibrationProfile.getProfile(profileId, (byte) (repeat & 0xfff)); } @Override public void onSetAlarms(ArrayList alarms) { try { BluetoothGattCharacteristic characteristic = getCharacteristic(MiBandService.UUID_CHARACTERISTIC_CONTROL_POINT); TransactionBuilder builder = performInitialized("Set alarm"); for (GBAlarm alarm : alarms) { queueAlarm(alarm, builder, characteristic); } builder.queue(getQueue()); Toast.makeText(getContext(), getContext().getString(R.string.user_feedback_miband_set_alarms_ok), Toast.LENGTH_SHORT).show(); } catch (IOException ex) { Toast.makeText(getContext(), getContext().getString(R.string.user_feedback_miband_set_alarms_failed), Toast.LENGTH_LONG).show(); LOG.error("Unable to set alarms on MI device", ex); } } @Override public void onSMS(String from, String body) { performPreferredNotification("sms received", ORIGIN_SMS, null); } @Override public void onEmail(String from, String subject, String body) { performPreferredNotification("email received", ORIGIN_K9MAIL, null); } @Override public void onGenericNotification(String title, String details) { performPreferredNotification("generic notification received", ORIGIN_GENERIC, null); } @Override public void onSetTime(long ts) { try { TransactionBuilder builder = performInitialized("Set date and time"); setCurrentTime(builder); builder.queue(getQueue()); } catch (IOException ex) { LOG.error("Unable to set time on MI device", ex); } } /** * Sets the current time to the Mi device using the given builder. * * @param builder */ private MiBandSupport setCurrentTime(TransactionBuilder builder) { Calendar now = GregorianCalendar.getInstance(); byte[] time = new byte[]{ (byte) (now.get(Calendar.YEAR) - 2000), (byte) now.get(Calendar.MONTH), (byte) now.get(Calendar.DATE), (byte) now.get(Calendar.HOUR_OF_DAY), (byte) now.get(Calendar.MINUTE), (byte) now.get(Calendar.SECOND), (byte) 0x0f, (byte) 0x0f, (byte) 0x0f, (byte) 0x0f, (byte) 0x0f, (byte) 0x0f }; BluetoothGattCharacteristic characteristic = getCharacteristic(MiBandService.UUID_CHARACTERISTIC_DATE_TIME); if (characteristic != null) { builder.write(characteristic, time); } else { LOG.info("Unable to set time -- characteristic not available"); } return this; } @Override public void onSetCallState(String number, String name, GBCommand command) { if (GBCommand.CALL_INCOMING.equals(command)) { telephoneRinging = true; AbortTransactionAction abortAction = new AbortTransactionAction() { @Override protected boolean shouldAbort() { return !isTelephoneRinging(); } }; performPreferredNotification("incoming call", MiBandConst.ORIGIN_INCOMING_CALL, abortAction); } else if (GBCommand.CALL_START.equals(command) || GBCommand.CALL_END.equals(command)) { telephoneRinging = false; } } private boolean isTelephoneRinging() { // don't synchronize, this is not really important return telephoneRinging; } @Override public void onSetMusicInfo(String artist, String album, String track) { // not supported } @Override public void onFirmwareVersionReq() { try { TransactionBuilder builder = performInitialized("Get MI Band device info"); BluetoothGattCharacteristic characteristic = getCharacteristic(MiBandService.UUID_CHARACTERISTIC_DEVICE_INFO); builder.read(characteristic).queue(getQueue()); } catch (IOException ex) { LOG.error("Unable to read device info from MI", ex); } } @Override public void onBatteryInfoReq() { try { TransactionBuilder builder = performInitialized("Get MI Band battery info"); requestBatteryInfo(builder); builder.queue(getQueue()); } catch (IOException ex) { LOG.error("Unable to read battery info from MI", ex); } } @Override public void onReboot() { try { TransactionBuilder builder = performInitialized("Reboot"); builder.write(getCharacteristic(MiBandService.UUID_CHARACTERISTIC_CONTROL_POINT), reboot); builder.queue(getQueue()); } catch (IOException ex) { LOG.error("Unable to reboot MI", ex); } } @Override public void onFindDevice(boolean start) { isLocatingDevice = start; if (start) { AbortTransactionAction abortAction = new AbortTransactionAction() { @Override protected boolean shouldAbort() { return !isLocatingDevice; } }; performDefaultNotification("locating device", (short) 255, abortAction); } } @Override public void onFetchActivityData() { try { TransactionBuilder builder = performInitialized("fetch activity data"); builder.add(new SetDeviceBusyAction(getDevice(), getContext().getString(R.string.busy_task_fetch_activity_data), getContext())); builder.write(getCharacteristic(MiBandService.UUID_CHARACTERISTIC_CONTROL_POINT), fetch); builder.queue(getQueue()); } catch (IOException ex) { LOG.error("Unable to fetch MI activity data", ex); } } @Override public void onInstallApp(Uri uri) { // not supported } @Override public void onAppInfoReq() { // not supported } @Override public void onAppStart(UUID uuid) { // not supported } @Override public void onAppDelete(UUID uuid) { // not supported } @Override public void onPhoneVersion(byte os) { // not supported } @Override public void onScreenshotReq() { // not supported } @Override public void onCharacteristicChanged(BluetoothGatt gatt, BluetoothGattCharacteristic characteristic) { super.onCharacteristicChanged(gatt, characteristic); UUID characteristicUUID = characteristic.getUuid(); if (MiBandService.UUID_CHARACTERISTIC_ACTIVITY_DATA.equals(characteristicUUID)) { handleActivityNotif(characteristic.getValue()); } else if (MiBandService.UUID_CHARACTERISTIC_BATTERY.equals(characteristicUUID)) { handleBatteryInfo(characteristic.getValue(), BluetoothGatt.GATT_SUCCESS); } else if (MiBandService.UUID_CHARACTERISTIC_NOTIFICATION.equals(characteristicUUID)) { // device somehow changed, should we update e.g. battery level? } } @Override public void onCharacteristicRead(BluetoothGatt gatt, BluetoothGattCharacteristic characteristic, int status) { super.onCharacteristicRead(gatt, characteristic, status); UUID characteristicUUID = characteristic.getUuid(); if (MiBandService.UUID_CHARACTERISTIC_DEVICE_INFO.equals(characteristicUUID)) { handleDeviceInfo(characteristic.getValue(), status); } else if (MiBandService.UUID_CHARACTERISTIC_BATTERY.equals(characteristicUUID)) { handleBatteryInfo(characteristic.getValue(), status); } } @Override public void onCharacteristicWrite(BluetoothGatt gatt, BluetoothGattCharacteristic characteristic, int status) { UUID characteristicUUID = characteristic.getUuid(); if (MiBandService.UUID_CHARACTERISTIC_PAIR.equals(characteristicUUID)) { handlePairResult(characteristic.getValue(), status); } else if (MiBandService.UUID_CHARACTERISTIC_USER_INFO.equals(characteristicUUID)) { handleUserInfoResult(characteristic.getValue(), status); } else if (MiBandService.UUID_CHARACTERISTIC_CONTROL_POINT.equals(characteristicUUID)) { handleControlPointResult(characteristic.getValue(), status); } } private void handleDeviceInfo(byte[] value, int status) { if (status == BluetoothGatt.GATT_SUCCESS) { DeviceInfo info = new DeviceInfo(value); getDevice().setFirmwareVersion(info.getFirmwareVersion()); getDevice().sendDeviceUpdateIntent(getContext()); } } private void queueAlarm(GBAlarm alarm, TransactionBuilder builder, BluetoothGattCharacteristic characteristic) { Calendar alarmCal = alarm.getAlarmCal(); byte[] alarmMessage = new byte[]{ (byte) MiBandService.COMMAND_SET_TIMER, (byte) alarm.getIndex(), (byte) (alarm.isEnabled() ? 1 : 0), (byte) (alarmCal.get(Calendar.YEAR) - 2000), (byte) alarmCal.get(Calendar.MONTH), (byte) alarmCal.get(Calendar.DATE), (byte) alarmCal.get(Calendar.HOUR_OF_DAY), (byte) alarmCal.get(Calendar.MINUTE), (byte) alarmCal.get(Calendar.SECOND), (byte) (alarm.isSmartWakeup() ? 30 : 0), (byte) alarm.getRepetitionMask() }; builder.write(characteristic, alarmMessage); } private void handleActivityNotif(byte[] value) { if (value.length == 11) { // byte 0 is the data type: 1 means that each minute is represented by a triplet of bytes int dataType = value[0]; // byte 1 to 6 represent a timestamp GregorianCalendar timestamp = new GregorianCalendar(value[1] + 2000, value[2], value[3], value[4], value[5], value[6]); // counter of all data held by the band int totalDataToRead = (value[7] & 0xff) | ((value[8] & 0xff) << 8); totalDataToRead *= (dataType == 1) ? 3 : 1; // counter of this data block int dataUntilNextHeader = (value[9] & 0xff) | ((value[10] & 0xff) << 8); dataUntilNextHeader *= (dataType == 1) ? 3 : 1; // there is a total of totalDataToRead that will come in chunks (3 bytes per minute if dataType == 1), // these chunks are usually 20 bytes long and grouped in blocks // after dataUntilNextHeader bytes we will get a new packet of 11 bytes that should be parsed // as we just did LOG.info("total data to read: " + totalDataToRead + " len: " + (totalDataToRead / 3) + " minute(s)"); LOG.info("data to read until next header: " + dataUntilNextHeader + " len: " + (dataUntilNextHeader / 3) + " minute(s)"); LOG.info("TIMESTAMP: " + DateFormat.getDateTimeInstance().format(timestamp.getTime()).toString() + " magic byte: " + dataUntilNextHeader); this.activityDataRemainingBytes = this.activityDataUntilNextHeader = dataUntilNextHeader; this.activityDataTimestampProgress = this.activityDataTimestampToAck = timestamp; } else { bufferActivityData(value); } if (this.activityDataRemainingBytes == 0) { sendAckDataTransfer(this.activityDataTimestampToAck, this.activityDataUntilNextHeader); flushActivityDataHolder(); } } private void bufferActivityData(byte[] value) { if (this.activityDataRemainingBytes >= value.length) { //I don't like this clause, but until we figure out why we get different data sometimes this should work if (value.length == 20 || value.length == this.activityDataRemainingBytes) { System.arraycopy(value, 0, this.activityDataHolder, this.activityDataHolderProgress, value.length); this.activityDataHolderProgress += value.length; this.activityDataRemainingBytes -= value.length; if (this.activityDataHolderSize == this.activityDataHolderProgress) { flushActivityDataHolder(); } } else { // the length of the chunk is not what we expect. We need to make sense of this data LOG.warn("GOT UNEXPECTED ACTIVITY DATA WITH LENGTH: " + value.length + ", EXPECTED LENGTH: " + this.activityDataRemainingBytes); for (byte b : value) { LOG.warn("DATA: " + String.format("0x%8x", b)); } } } } private void flushActivityDataHolder() { GregorianCalendar timestamp = this.activityDataTimestampProgress; byte category, intensity, steps; ActivityDatabaseHandler dbHandler = GBApplication.getActivityDatabaseHandler(); try (SQLiteDatabase db = dbHandler.getWritableDatabase()) { // explicitly keep the db open while looping over the samples for (int i = 0; i < this.activityDataHolderProgress; i += 3) { //TODO: check if multiple of 3, if not something is wrong category = this.activityDataHolder[i]; intensity = this.activityDataHolder[i + 1]; steps = this.activityDataHolder[i + 2]; dbHandler.addGBActivitySample( (int) (timestamp.getTimeInMillis() / 1000), GBActivitySample.PROVIDER_MIBAND, intensity, steps, category); timestamp.add(Calendar.MINUTE, 1); } } this.activityDataHolderProgress = 0; this.activityDataTimestampProgress = timestamp; } private void handleControlPointResult(byte[] value, int status) { if (status != BluetoothGatt.GATT_SUCCESS) { LOG.warn("Could not write to the control point."); } LOG.info("handleControlPoint got status:" + status); if (getDevice().isBusy()) { if (isActivityDataSyncFinished(value)) { unsetBusy(); } } if (value != null) { for (byte b : value) { LOG.info("handleControlPoint GOT DATA:" + String.format("0x%8x", b)); } } else { LOG.warn("handleControlPoint GOT null"); } } private boolean isActivityDataSyncFinished(byte[] value) { // byte 0 is the kind of message // byte 1 to 6 represent a timestamp // byte 7 to 8 represent the amount of data left (0 = done) if (value.length == 9) { if (value[0] == 0xa && value[7] == 0 && value[8] == 0) { return true; } } return false; } private void unsetBusy() { getDevice().unsetBusyTask(); getDevice().sendDeviceUpdateIntent(getContext()); } private void sendAckDataTransfer(Calendar time, int bytesTransferred) { byte[] ack = new byte[]{ MiBandService.COMMAND_CONFIRM_ACTIVITY_DATA_TRANSFER_COMPLETE, (byte) (time.get(Calendar.YEAR) - 2000), (byte) time.get(Calendar.MONTH), (byte) time.get(Calendar.DATE), (byte) time.get(Calendar.HOUR_OF_DAY), (byte) time.get(Calendar.MINUTE), (byte) time.get(Calendar.SECOND), (byte) (bytesTransferred & 0xff), (byte) (0xff & (bytesTransferred >> 8)) }; try { TransactionBuilder builder = performInitialized("send acknowledge"); builder.write(getCharacteristic(MiBandService.UUID_CHARACTERISTIC_CONTROL_POINT), ack); builder.queue(getQueue()); } catch (IOException ex) { LOG.error("Unable to send ack to MI", ex); } } private void handleBatteryInfo(byte[] value, int status) { if (status == BluetoothGatt.GATT_SUCCESS) { BatteryInfo info = new BatteryInfo(value); getDevice().setBatteryLevel((short) info.getLevelInPercent()); getDevice().setBatteryState(info.getStatus()); getDevice().sendDeviceUpdateIntent(getContext()); } } private void handleUserInfoResult(byte[] value, int status) { // successfully transfered user info means we're initialized if (status == BluetoothGatt.GATT_SUCCESS) { setConnectionState(State.INITIALIZED); } } private void setConnectionState(State newState) { getDevice().setState(newState); getDevice().sendDeviceUpdateIntent(getContext()); } private void handlePairResult(byte[] pairResult, int status) { if (status != BluetoothGatt.GATT_SUCCESS) { LOG.info("Pairing MI device failed: " + status); return; } String value = null; if (pairResult != null) { if (pairResult.length == 1) { try { if (pairResult[0] == 2) { LOG.info("Successfully paired MI device"); return; } } catch (Exception ex) { LOG.warn("Error identifying pairing result", ex); return; } } value = Arrays.toString(pairResult); } LOG.info("MI Band pairing result: " + value); } @Override protected TransactionBuilder createTransactionBuilder(String taskName) { return new MiBandTransactionBuilder(taskName); } }