Bluetooth LEとiBeaconを使った、すれ違い通信
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第1回 MOSA Tech Meetingの発表資料。 GitHub https://github.com/murakami/workbook/tree/master/ios/Wibree Cocoa練習帳 http://www.bitz.co.jp/weblog/
![Central Managerの用意
self.centralManager = [[CBCentralManager alloc] initWithDelegate:self
queue:dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0)];
Peripheralを探す
- (void)centralManagerDidUpdateState:(CBCentralManager *)central
{
if (central.state != CBCentralManagerStatePoweredOn) {
return;
}
[self scan];
}
!
探すサービスUUID
- (void)scan
{
[self.centralManager scanForPeripheralsWithServices:
@[[CBUUID UUIDWithString:WIBREE_SERVICE_UUID]]
options:@{ CBCentralManagerScanOptionAllowDuplicatesKey : @YES }];
}](https://image.slidesharecdn.com/random-140304084501-phpapp02/85/Bluetooth-LE-iBeacon-8-320.jpg){kind=tracking}
![Peripheralが見つかったので接続する
- (void)centralManager:(CBCentralManager *)central
didDiscoverPeripheral:(CBPeripheral *)peripheral
advertisementData:(NSDictionary *)advertisementData
RSSI:(NSNumber *)RSSI
{
if (self.discoveredPeripheral != peripheral) {
self.discoveredPeripheral = peripheral;
[self.centralManager connectPeripheral:peripheral options:nil];
}
}
サービスUUIDで検索
- (void)centralManager:(CBCentralManager *)central
didConnectPeripheral:(CBPeripheral *)peripheral
{
[self.centralManager stopScan];
[self.data setLength:0];
peripheral.delegate = self;
[peripheral discoverServices:@[[CBUUID UUIDWithString:WIBREE_SERVICE_UUID]]];
}](https://image.slidesharecdn.com/random-140304084501-phpapp02/85/Bluetooth-LE-iBeacon-9-320.jpg){kind=tracking}
![キャラクタリスティックUUIDで検索
- (void)peripheral:(CBPeripheral *)peripheral
didDiscoverServices:(NSError *)error
{
if (error) {
[self cleanup];
return;
}
for (CBService *service in peripheral.services) {
[peripheral discoverCharacteristics:
@[[CBUUID UUIDWithString:WIBREE_CHARACTERISTIC_UUID]]
forService:service];
}
}
!
- (void)peripheral:(CBPeripheral *)peripheral
didDiscoverCharacteristicsForService:(CBService *)service
error:(NSError *)error
{
if (error) {
[self cleanup];
return;
}
for (CBCharacteristic *characteristic in service.characteristics) {
if ([characteristic.UUID isEqual:[CBUUID UUIDWithString:
WIBREE_CHARACTERISTIC_UUID]]) {
[peripheral setNotifyValue:YES forCharacteristic:characteristic];
}
}
}](https://image.slidesharecdn.com/random-140304084501-phpapp02/85/Bluetooth-LE-iBeacon-10-320.jpg){kind=tracking}
![識別子を受け取る
- (void)peripheral:(CBPeripheral *)peripheral
didUpdateValueForCharacteristic:(CBCharacteristic *)characteristic
error:(NSError *)error
{
NSString *stringFromData = [[NSString alloc]
initWithData:characteristic.value encoding:NSUTF8StringEncoding];
if ([stringFromData isEqualToString:@"EOM"]) {
NSString
*uniqueIdentifier = [[NSString alloc]
initWithData:self.data encoding:NSUTF8StringEncoding];
dispatch_async(dispatch_get_main_queue(), ^{
[self _notifyParserDidDiscoverUUID:uniqueIdentifier];
});
[peripheral setNotifyValue:NO forCharacteristic:characteristic];
[self.centralManager cancelPeripheralConnection:peripheral];
}
[self.data appendData:characteristic.value];
}
!
- (void)peripheral:(CBPeripheral *)peripheral
didUpdateNotificationStateForCharacteristic:(CBCharacteristic *)characteristic
error:(NSError *)error
{
if (![characteristic.UUID isEqual:[CBUUID
UUIDWithString:WIBREE_CHARACTERISTIC_UUID]]) {
return;
}
if (! characteristic.isNotifying) {
[self.centralManager cancelPeripheralConnection:peripheral];
}
}](https://image.slidesharecdn.com/random-140304084501-phpapp02/85/Bluetooth-LE-iBeacon-11-320.jpg){kind=tracking}
![Peripheral Managerの用意
self.peripheralManager = [[CBPeripheralManager alloc] initWithDelegate:self
queue:dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0)];
[self.peripheralManager startAdvertising:
見つけてもらうサービスUUID
@{ CBAdvertisementDataServiceUUIDsKey :
@[[CBUUID UUIDWithString:WIBREE_SERVICE_UUID]] }];
Peripheralが利用可能
- (void)peripheralManagerDidUpdateState:(CBPeripheralManager *)peripheral
{
if (peripheral.state != CBPeripheralManagerStatePoweredOn) {
return;
}
self.transferCharacteristic = [[CBMutableCharacteristic alloc]
initWithType:[CBUUID UUIDWithString:WIBREE_CHARACTERISTIC_UUID]
properties:CBCharacteristicPropertyNotify
value:nil
permissions:CBAttributePermissionsReadable];
CBMutableService *transferService = [[CBMutableService alloc]
initWithType:[CBUUID UUIDWithString:WIBREE_SERVICE_UUID]
primary:YES];
transferService.characteristics = @[self.transferCharacteristic];
[self.peripheralManager addService:transferService];
}](https://image.slidesharecdn.com/random-140304084501-phpapp02/85/Bluetooth-LE-iBeacon-12-320.jpg){kind=tracking}
![識別子の送信
- (void)peripheralManager:(CBPeripheralManager *)peripheral
central:(CBCentral *)central
didSubscribeToCharacteristic:(CBCharacteristic *)characteristic
{
self.dataToSend = [[Document sharedDocument].uniqueIdentifier dataUsingEncoding:NSUTF8StringEncoding];
self.sendDataIndex = 0;
[self sendData];
}
!
- (void)sendData
{
static BOOL sendingEOM = NO;
if (sendingEOM) {
BOOL didSend = [self.peripheralManager
updateValue:[@"EOM" dataUsingEncoding:NSUTF8StringEncoding]
forCharacteristic:self.transferCharacteristic onSubscribedCentrals:nil];
if (didSend) sendingEOM = NO;
return;
}
if (self.sendDataIndex >= self.dataToSend.length) return;
BOOL didSend = YES;
while (didSend) {
NSInteger amountToSend = self.dataToSend.length - self.sendDataIndex;
if (amountToSend > NOTIFY_MTU) amountToSend = NOTIFY_MTU;
NSData *chunk = [NSData dataWithBytes:self.dataToSend.bytes+self.sendDataIndex length:amountToSend];
didSend = [self.peripheralManager updateValue:chunk
forCharacteristic:self.transferCharacteristic onSubscribedCentrals:nil];
if (!didSend) return;
NSString *stringFromData = [[NSString alloc] initWithData:chunk encoding:NSUTF8StringEncoding];
self.sendDataIndex += amountToSend;
if (self.sendDataIndex >= self.dataToSend.length) {
sendingEOM = YES;
BOOL eomSent = [self.peripheralManager updateValue:
[@"EOM" dataUsingEncoding:NSUTF8StringEncoding]
forCharacteristic:self.transferCharacteristic onSubscribedCentrals:nil];
if (eomSent) sendingEOM = NO;
return;
}
}
}
!
- (void)peripheralManagerIsReadyToUpdateSubscribers:(CBPeripheralManager *)peripheral
{
[self sendData];
}](https://image.slidesharecdn.com/random-140304084501-phpapp02/85/Bluetooth-LE-iBeacon-13-320.jpg){kind=tracking}
![iBeaconを探す
/* CLLocationManagerを生成 */
self.locationManager = [[CLLocationManager alloc] init];
self.locationManager.delegate = self;
if (! self.locationManager) {
/* CLLocationManagerの初期化失敗 */
self.state = kBeaconCentralStateError;
self.error = [self _errorWithCode:kBeaconCentralResponseParserGenericError
localizedDescription:@"CLLocationManagerの初期化に失敗しました。"];
}
return;
探すビーコンのUUID
!
/* ビーコン領域を生成 */
NSUUID *uuid = [[NSUUID alloc] initWithUUIDString:BEACON_SERVICE_UUID];
self.beaconRegion = [[CLBeaconRegion alloc] initWithProximityUUID:uuid
identifier:@"demo.Wibree.BeaconCentralResponseParser"];
if (! self.beaconRegion) {
/* ビーコン領域の初期化失敗 */
self.state = kBeaconCentralStateError;
self.error = [self _errorWithCode:kBeaconCentralResponseParserGenericError
localizedDescription:@"ビーコン領域の初期化に失敗しました。"];
}
self.locationManager = nil;
return;
!
/* ビーコン領域の出入りを監視 */
[self.locationManager startMonitoringForRegion:self.beaconRegion];
!
/* 距離を監視 */
[self.locationManager startRangingBeaconsInRegion:self.beaconRegion];](https://image.slidesharecdn.com/random-140304084501-phpapp02/85/Bluetooth-LE-iBeacon-17-320.jpg){kind=tracking}
![検出
領域に入る
- (void)locationManager:(CLLocationManager *)manager didEnterRegion:(CLRegion *)region
{
DBGMSG(@"%s", __func__);
if ([self.delegate respondsToSelector:@selector(beaconCentralResponseParser:didEnterRegion:)]) {
[self.delegate beaconCentralResponseParser:self didEnterRegion:region];
}
領域から外れる
}
!
- (void)locationManager:(CLLocationManager *)manager didExitRegion:(CLRegion *)region
{
DBGMSG(@"%s", __func__);
if ([self.delegate respondsToSelector:@selector(beaconCentralResponseParser:didExitRegion:)]) {
[self.delegate beaconCentralResponseParser:self didExitRegion:region];
}
}
距離を監視
!
-(void)locationManager:(CLLocationManager *)manager
{
}
!
didRangeBeacons:(NSArray *)beacons
inRegion:(CLBeaconRegion *)region
DBGMSG(@"%s", __func__);
if ([self.delegate respondsToSelector:@selector(beaconCentralResponseParser:didRangeBeacons:inRegion:)]) {
[self.delegate beaconCentralResponseParser:self didRangeBeacons:beacons inRegion:region];
}
- (void)locationManager:(CLLocationManager *)manager
monitoringDidFailForRegion:(CLRegion *)region
withError:(NSError *)error
{
DBGMSG(@"%s region:%@", __func__, region);
DBGMSG(@"%s error:%@", __func__, error);
}](https://image.slidesharecdn.com/random-140304084501-phpapp02/85/Bluetooth-LE-iBeacon-18-320.jpg){kind=tracking}
![見つけてほしいUUIDを告知
/* CBPeripheralManagerを生成 */
self.peripheralManager = [[CBPeripheralManager alloc] initWithDelegate:self
queue:dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0)];
if (! self.peripheralManager) {
/* CBPeripheralManagerの初期化失敗 */
self.state = kBeaconPeripheralStateError;
self.error = [self _errorWithCode:kBeaconPeripheralResponseParserGenericError
localizedDescription:@"CBPeripheralManagerの初期化に失敗しました。"];
return;
}
!
見つけてほしいビーコンのUUID
/* ビーコン領域を生成 */
NSUUID *uuid = [[NSUUID alloc] initWithUUIDString:BEACON_SERVICE_UUID];
self.beaconRegion = [[CLBeaconRegion alloc] initWithProximityUUID:uuid
major:12345
minor:67890
identifier:@"demo.Wibree.BeaconCentralResponseParser"];
if (! self.beaconRegion) {
/* ビーコン領域の初期化失敗 */
self.state = kBeaconPeripheralStateError;
self.error = [self _errorWithCode:kBeaconPeripheralResponseParserGenericError
localizedDescription:@"ビーコン領域の初期化に失敗しました。"];
self.peripheralManager = nil;
return;
}
!
/* 告知開始 */
NSDictionary
*dictionary = [self.beaconRegion peripheralDataWithMeasuredPower:nil];
[self.peripheralManager startAdvertising:dictionary];](https://image.slidesharecdn.com/random-140304084501-phpapp02/85/Bluetooth-LE-iBeacon-19-320.jpg){kind=tracking}
Bluetooth LEとiBeaconを使った、すれ違い通信
- 3. Bluetoothは、省電力な電波を使った無線通信 で、最新の4.xでは対応機器は次の3つに分類さ れます。 分類 Bluetooth Smart Bluetooth Smart Ready Bluetooth 説明 4.0で追加されたBluetooth Low Energyのみ対 応。 Bluetooth LEと従来のBluetoothの両方に対 応。 従来のBluetoothのみ対応。
- 4. iOSでBluetoothに対応する方法を整理してみます。 Bluetoothの種類 説明 MFi機器に対してExternal Accessory Frameworkで通信。 従来のBLuetooth Game Kit Bluetooth LE Core Bluetooth Framework iOSでは、無関係の機器と自由に通信したいのならBluetooth LEという事にな るかと思います。
- 6. Service UUID Central 発見 Peripheral Advertise Peripheralが対応しているService UUIDをAdvertiseする。 Centralは探しているService UUIDがないか調査する。 Centralが見つけられたら、Peripheralに対して接続要求を出 し、受けいれるとデータ通信が可能になる。 サンプルコードでは、識別子のCharacteristic UUIDを問い合わ せて、識別子を受け取っている。
- 7. SAMPLE CODE
- 8. Central Managerの用意 self.centralManager = [[CBCentralManager alloc] initWithDelegate:self queue:dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0)]; Peripheralを探す - (void)centralManagerDidUpdateState:(CBCentralManager *)central { if (central.state != CBCentralManagerStatePoweredOn) { return; } [self scan]; } ! 探すサービスUUID - (void)scan { [self.centralManager scanForPeripheralsWithServices: @[[CBUUID UUIDWithString:WIBREE_SERVICE_UUID]] options:@{ CBCentralManagerScanOptionAllowDuplicatesKey : @YES }]; }
- 9. Peripheralが見つかったので接続する - (void)centralManager:(CBCentralManager *)central didDiscoverPeripheral:(CBPeripheral *)peripheral advertisementData:(NSDictionary *)advertisementData RSSI:(NSNumber *)RSSI { if (self.discoveredPeripheral != peripheral) { self.discoveredPeripheral = peripheral; [self.centralManager connectPeripheral:peripheral options:nil]; } } サービスUUIDで検索 - (void)centralManager:(CBCentralManager *)central didConnectPeripheral:(CBPeripheral *)peripheral { [self.centralManager stopScan]; [self.data setLength:0]; peripheral.delegate = self; [peripheral discoverServices:@[[CBUUID UUIDWithString:WIBREE_SERVICE_UUID]]]; }
- 10. キャラクタリスティックUUIDで検索 - (void)peripheral:(CBPeripheral *)peripheral didDiscoverServices:(NSError *)error { if (error) { [self cleanup]; return; } for (CBService *service in peripheral.services) { [peripheral discoverCharacteristics: @[[CBUUID UUIDWithString:WIBREE_CHARACTERISTIC_UUID]] forService:service]; } } ! - (void)peripheral:(CBPeripheral *)peripheral didDiscoverCharacteristicsForService:(CBService *)service error:(NSError *)error { if (error) { [self cleanup]; return; } for (CBCharacteristic *characteristic in service.characteristics) { if ([characteristic.UUID isEqual:[CBUUID UUIDWithString: WIBREE_CHARACTERISTIC_UUID]]) { [peripheral setNotifyValue:YES forCharacteristic:characteristic]; } } }
- 11. 識別子を受け取る - (void)peripheral:(CBPeripheral *)peripheral didUpdateValueForCharacteristic:(CBCharacteristic *)characteristic error:(NSError *)error { NSString *stringFromData = [[NSString alloc] initWithData:characteristic.value encoding:NSUTF8StringEncoding]; if ([stringFromData isEqualToString:@"EOM"]) { NSString *uniqueIdentifier = [[NSString alloc] initWithData:self.data encoding:NSUTF8StringEncoding]; dispatch_async(dispatch_get_main_queue(), ^{ [self _notifyParserDidDiscoverUUID:uniqueIdentifier]; }); [peripheral setNotifyValue:NO forCharacteristic:characteristic]; [self.centralManager cancelPeripheralConnection:peripheral]; } [self.data appendData:characteristic.value]; } ! - (void)peripheral:(CBPeripheral *)peripheral didUpdateNotificationStateForCharacteristic:(CBCharacteristic *)characteristic error:(NSError *)error { if (![characteristic.UUID isEqual:[CBUUID UUIDWithString:WIBREE_CHARACTERISTIC_UUID]]) { return; } if (! characteristic.isNotifying) { [self.centralManager cancelPeripheralConnection:peripheral]; } }
- 12. Peripheral Managerの用意 self.peripheralManager = [[CBPeripheralManager alloc] initWithDelegate:self queue:dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0)]; [self.peripheralManager startAdvertising: 見つけてもらうサービスUUID @{ CBAdvertisementDataServiceUUIDsKey : @[[CBUUID UUIDWithString:WIBREE_SERVICE_UUID]] }]; Peripheralが利用可能 - (void)peripheralManagerDidUpdateState:(CBPeripheralManager *)peripheral { if (peripheral.state != CBPeripheralManagerStatePoweredOn) { return; } self.transferCharacteristic = [[CBMutableCharacteristic alloc] initWithType:[CBUUID UUIDWithString:WIBREE_CHARACTERISTIC_UUID] properties:CBCharacteristicPropertyNotify value:nil permissions:CBAttributePermissionsReadable]; CBMutableService *transferService = [[CBMutableService alloc] initWithType:[CBUUID UUIDWithString:WIBREE_SERVICE_UUID] primary:YES]; transferService.characteristics = @[self.transferCharacteristic]; [self.peripheralManager addService:transferService]; }
- 13. 識別子の送信 - (void)peripheralManager:(CBPeripheralManager *)peripheral central:(CBCentral *)central didSubscribeToCharacteristic:(CBCharacteristic *)characteristic { self.dataToSend = [[Document sharedDocument].uniqueIdentifier dataUsingEncoding:NSUTF8StringEncoding]; self.sendDataIndex = 0; [self sendData]; } ! - (void)sendData { static BOOL sendingEOM = NO; if (sendingEOM) { BOOL didSend = [self.peripheralManager updateValue:[@"EOM" dataUsingEncoding:NSUTF8StringEncoding] forCharacteristic:self.transferCharacteristic onSubscribedCentrals:nil]; if (didSend) sendingEOM = NO; return; } if (self.sendDataIndex >= self.dataToSend.length) return; BOOL didSend = YES; while (didSend) { NSInteger amountToSend = self.dataToSend.length - self.sendDataIndex; if (amountToSend > NOTIFY_MTU) amountToSend = NOTIFY_MTU; NSData *chunk = [NSData dataWithBytes:self.dataToSend.bytes+self.sendDataIndex length:amountToSend]; didSend = [self.peripheralManager updateValue:chunk forCharacteristic:self.transferCharacteristic onSubscribedCentrals:nil]; if (!didSend) return; NSString *stringFromData = [[NSString alloc] initWithData:chunk encoding:NSUTF8StringEncoding]; self.sendDataIndex += amountToSend; if (self.sendDataIndex >= self.dataToSend.length) { sendingEOM = YES; BOOL eomSent = [self.peripheralManager updateValue: [@"EOM" dataUsingEncoding:NSUTF8StringEncoding] forCharacteristic:self.transferCharacteristic onSubscribedCentrals:nil]; if (eomSent) sendingEOM = NO; return; } } } ! - (void)peripheralManagerIsReadyToUpdateSubscribers:(CBPeripheralManager *)peripheral { [self sendData]; }
- 14. バックグラウンドで動かすには Info.plistのRequired background modesでApp communicates using CoreBluetoothを設定。 Info.plistのRequired background modesでApp shares data using CoreBluetoothを設定。
- 17. iBeaconを探す /* CLLocationManagerを生成 */ self.locationManager = [[CLLocationManager alloc] init]; self.locationManager.delegate = self; if (! self.locationManager) { /* CLLocationManagerの初期化失敗 */ self.state = kBeaconCentralStateError; self.error = [self _errorWithCode:kBeaconCentralResponseParserGenericError localizedDescription:@"CLLocationManagerの初期化に失敗しました。"]; } return; 探すビーコンのUUID ! /* ビーコン領域を生成 */ NSUUID *uuid = [[NSUUID alloc] initWithUUIDString:BEACON_SERVICE_UUID]; self.beaconRegion = [[CLBeaconRegion alloc] initWithProximityUUID:uuid identifier:@"demo.Wibree.BeaconCentralResponseParser"]; if (! self.beaconRegion) { /* ビーコン領域の初期化失敗 */ self.state = kBeaconCentralStateError; self.error = [self _errorWithCode:kBeaconCentralResponseParserGenericError localizedDescription:@"ビーコン領域の初期化に失敗しました。"]; } self.locationManager = nil; return; ! /* ビーコン領域の出入りを監視 */ [self.locationManager startMonitoringForRegion:self.beaconRegion]; ! /* 距離を監視 */ [self.locationManager startRangingBeaconsInRegion:self.beaconRegion];
- 18. 検出 領域に入る - (void)locationManager:(CLLocationManager *)manager didEnterRegion:(CLRegion *)region { DBGMSG(@"%s", __func__); if ([self.delegate respondsToSelector:@selector(beaconCentralResponseParser:didEnterRegion:)]) { [self.delegate beaconCentralResponseParser:self didEnterRegion:region]; } 領域から外れる } ! - (void)locationManager:(CLLocationManager *)manager didExitRegion:(CLRegion *)region { DBGMSG(@"%s", __func__); if ([self.delegate respondsToSelector:@selector(beaconCentralResponseParser:didExitRegion:)]) { [self.delegate beaconCentralResponseParser:self didExitRegion:region]; } } 距離を監視 ! -(void)locationManager:(CLLocationManager *)manager { } ! didRangeBeacons:(NSArray *)beacons inRegion:(CLBeaconRegion *)region DBGMSG(@"%s", __func__); if ([self.delegate respondsToSelector:@selector(beaconCentralResponseParser:didRangeBeacons:inRegion:)]) { [self.delegate beaconCentralResponseParser:self didRangeBeacons:beacons inRegion:region]; } - (void)locationManager:(CLLocationManager *)manager monitoringDidFailForRegion:(CLRegion *)region withError:(NSError *)error { DBGMSG(@"%s region:%@", __func__, region); DBGMSG(@"%s error:%@", __func__, error); }
- 19. 見つけてほしいUUIDを告知 /* CBPeripheralManagerを生成 */ self.peripheralManager = [[CBPeripheralManager alloc] initWithDelegate:self queue:dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0)]; if (! self.peripheralManager) { /* CBPeripheralManagerの初期化失敗 */ self.state = kBeaconPeripheralStateError; self.error = [self _errorWithCode:kBeaconPeripheralResponseParserGenericError localizedDescription:@"CBPeripheralManagerの初期化に失敗しました。"]; return; } ! 見つけてほしいビーコンのUUID /* ビーコン領域を生成 */ NSUUID *uuid = [[NSUUID alloc] initWithUUIDString:BEACON_SERVICE_UUID]; self.beaconRegion = [[CLBeaconRegion alloc] initWithProximityUUID:uuid major:12345 minor:67890 identifier:@"demo.Wibree.BeaconCentralResponseParser"]; if (! self.beaconRegion) { /* ビーコン領域の初期化失敗 */ self.state = kBeaconPeripheralStateError; self.error = [self _errorWithCode:kBeaconPeripheralResponseParserGenericError localizedDescription:@"ビーコン領域の初期化に失敗しました。"]; self.peripheralManager = nil; return; } ! /* 告知開始 */ NSDictionary *dictionary = [self.beaconRegion peripheralDataWithMeasuredPower:nil]; [self.peripheralManager startAdvertising:dictionary];