[英]Peripheral device services showing nil in all BLE Scanner iOS App but not in android code
零件编号:CC2640R2F
工具/软件:Code Composer Studio
我正在做一个项目,在我的项目中CC2640R2F正在执行广告和扫描。 我正在使用自定义BLE服务从应用程序(Android或iOS)接收数据到CC2640R2F。 每当我将设备与android中的BLE扫描仪连接时,我都会获得所有服务和所有特征,并且我也能够毫无问题地发送和接收数据。 这也可以在我的自定义android应用中使用。
但是,每当我在iOS应用程序中将CC2640R2F设备与BLE扫描仪连接时,该设备都已连接,但应用程序中没有任何服务或特性。 同样的情况也发生在我们开发的自定义ios应用程序中。 为什么会这样呢? 如果我在Android上获得所有东西,那么这也应该在iOS上运行。
用于检查蓝牙是否已打开电源并扫描外围设备的代码:[![用于检查蓝牙是否已打开电源并扫描外围设备的代码] [3]] [3]
如果找到外围设备则连接到设备的代码:[![如果找到外围设备则连接到设备的代码] [4]] [4]
连接设备后搜索服务的代码(如果找到服务,则它将中断timer(),否则将再次搜索服务):
func centralManagerDidUpdateState(_ Central:CBCentralManager){print(“ --- centralManagerDidUpdateState”)
if central.state == CBManagerState.poweredOn {
debugPrint("poweredOn")
let serviceUUIDs:[AnyObject] = [serviceCBUUID_READ]
let lastPeripherals = centralManager.retrieveConnectedPeripherals(withServices: serviceUUIDs as! [CBUUID])
if lastPeripherals.count > 0{
let device = lastPeripherals.last! as CBPeripheral;
deviceX = device;
centralManager.connect(deviceX, options: nil)
if(device.state == .disconnected){
self.alertShowing(msg: "Device is disconnected restart the device and connect again.")
}
}
else {
centralManager.scanForPeripherals(withServices: nil, options: nil)
}
debugPrint(lastPeripherals)
} else if(central.state == CBManagerState.poweredOff) {
self.alertShowing(msg: "Make sure that your bluetooth is turned on.")
}
else if(central.state == CBManagerState.unsupported) {
self.alertShowing(msg: "This device is unsupported.")
}else{
self.alertShowing(msg: "Try again after restarting the device.")
}
}
// DidDiscoverPeripheral
func centralManager(_ central: CBCentralManager, didDiscover peripheral: CBPeripheral, advertisementData: [String : Any], rssi RSSI: NSNumber) {
if(peripheral.name == "Peripheral Observer") || (peripheral.name == "BLE Device"){
if let services = peripheral.services{
for service in services{
debugPrint(service)
}
}
debugPrint("advertisementData :\(advertisementData)")
deviceX = peripheral
peripheral.delegate = self
centralManager.stopScan()
centralManager.connect(peripheral)
}
}
//在didConnect内部
func centralManager(_ central: CBCentralManager, didConnect peripheral: CBPeripheral) {
debugPrint("Connected")
var i = 0
timerForService = Timer.scheduledTimer(withTimeInterval: 1, repeats: true, block: { (timer) in
if(self.service_Read == nil) && (self.service_Write == nil){
i += 1
if(i%2 == 1){
debugPrint("loop1")
peripheral.discoverServices(nil)
self.deviceX!.discoverServices(nil)
}else if( i&2 == 0){
debugPrint("loop0")
self.deviceX!.discoverServices([self.serviceCBUUID_READ, self.serviceCBUUID_Write])
}
}else{
self.timerForService.invalidate()
}
})
}
您使用错误的方式在iOS中心中发现BLE服务。 (恐怕我的回答是用Objective-c编写的,但是,这很重要,并且转换为Swift很容易)
您必须定义一个全局CBPeriphal
实例并在代码中使用它
@interface CentralManager()
property (nonatomic, strong) CBPeripheral *golablePeripheral;
@end
- (void)centralManager:(CBCentralManager *)central didDiscoverPeripheral:(CBPeripheral *)peripheral advertisementData:(NSDictionary<NSString *,id> *)advertisementData RSSI:(NSNumber *)RSSI {
self.golablePeripheral = peripheral;
self.golablePeripheral.delegate = self;
}
然后,一旦获得连接的委托,就可以开始发现服务:
- (void)centralManager:(CBCentralManager *)central didConnectPeripheral:(CBPeripheral *)peripheral {
[self.golablePeripheral discoverServices: _serviceUUID];
}
然后,您将获得以下代表。 现在是开始发现特征的时候了:
- (void)peripheral:(CBPeripheral *)peripheral didDiscoverServices:(NSError *)error {
for (CBService *service in peripheral.services) {
if ([_serviceUUID containsObject: service.UUID]) {
[self.golablePeripheral discoverCharacteristics:_serviceCharacteristics forService:service];
[self.golablePeripheral discoverCharacteristics:_serviceNotifyCharacteristics forService:service];
}
}
}
我强烈建议您对与BLE相关的项目使用BluetoothLEManager 。 我已经在几个企业项目中使用过它。
经过长时间的搜索后,我发现了设备方面的问题,我们通过增加设备CC2640R2F的堆内存来解决该问题,并设置了ATT MTU大小,此后我们设法接收服务,大约6或7次与外围设备连接断开连接核心蓝牙连设备都找不到服务。 最终解决方案是增加外围设备的缓冲区大小。
https://github.com/NordicPlayground/ANT-Shared-Channel-Demo/issues/1 https://forums.developer.apple.com/thread/73871
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