[英]iOS Bluetooth: central- peripheral got connected before accepting pairing request
I have some problem with bluetooth connection as i am communicating with one device to other following CBCentral and CBPeripherel concepts. 蓝牙连接时出现问题,因为我正在按照CBCentral和CBPeripherel概念与一台设备进行通讯。 But, Peripherel device gets connected to Central before accepting pairing request pop up, basically central passes some data to peripheral before accepting pairing request.
但是,Peripherel设备在接受配对请求之前就已连接到Central,基本上Central在接受配对请求之前将一些数据传递给外围设备。
-- (void)peripheral:(CBPeripheral *)peripheral didDiscoverCharacteristicsForService:(CBService *)service error:(NSError *)error
{ {
for (CBCharacteristic *characteristic in service.characteristics)
{
NSLog(@"for loop for charactersitc %@",characteristic.UUID);
// And check if it's the right one
if ([characteristic.UUID isEqual:[CBUUID UUIDWithString:TRANSFER_SLIDEINDEX_CHARACTERISTIC_UUID]])
{
// If it is, subscribe to it
[peripheral setNotifyValue:YES forCharacteristic:characteristic];
}
if ([characteristic.UUID isEqual:[CBUUID UUIDWithString:TRANSFER_SCROLL_CHARACTERISTIC_UUID]])
{
// If it is, subscribe to it
[peripheral setNotifyValue:YES forCharacteristic:characteristic];
}
if ([characteristic.UUID isEqual:[CBUUID UUIDWithString:TRANSFER_FULLSCREEN_CHARACTERISTIC_UUID]])
{
// If it is, subscribe to it
[peripheral setNotifyValue:YES forCharacteristic:characteristic];
}
if ([characteristic.UUID isEqual:[CBUUID UUIDWithString:SLIDELENGTH_CHARACTERISTIC_UUID]])
{
// WRITE VALUES TO REMOTE
NSInteger length = self.presentationDataSourceArray.count;
NSData *chunk = [NSData dataWithBytes: &length length: sizeof(length)];
[self.discoveredPeripheral writeValue:chunk forCharacteristic:characteristic
type:CBCharacteristicWriteWithResponse];
[self.discoveredPeripheral setNotifyValue:YES forCharacteristic:characteristic];
}
if ([characteristic.UUID isEqual:[CBUUID UUIDWithString:DEVICENAME_CHARACTERISTIC_UUID]])
{
NSString *deviceName = [[UIDevice currentDevice]name];
NSData *chunk = [deviceName dataUsingEncoding:NSUTF8StringEncoding];
[self.discoveredPeripheral writeValue:chunk forCharacteristic:characteristic
type:CBCharacteristicWriteWithResponse];
[self.discoveredPeripheral setNotifyValue:YES forCharacteristic:characteristic];
NSLog(@"Sending Device Name");
}
if ([characteristic.UUID isEqual: [CBUUID UUIDWithString:CURRENTSLIDE_CHARACTERISTIC_UUID]])
{
self.currentSlideIndexCharacterestics = (CBMutableCharacteristic*) characteristic;
NSInteger count = self.currentPage;
NSData *chunk = [NSData dataWithBytes: &count length: sizeof(count)];
[self.discoveredPeripheral writeValue:chunk forCharacteristic:characteristic
type:CBCharacteristicWriteWithResponse];
[self.discoveredPeripheral setNotifyValue:YES forCharacteristic:characteristic];
}
_isRemoteConnected = YES;
}
The problem is not in your APP,it's in your BLE Device . 问题不在您的APP中,而是在BLE设备中。
BLE Device's data can be written and readed without paired.It's totally fine. BLE设备的数据可以不成对写入和读取,完全可以。
A pair request is launched only if you try to access Encryption character's data,which is configured in peripheral side like this: 仅当您尝试访问加密字符的数据时才启动配对请求,这是在外围设备侧配置的,如下所示:
emailCharacteristic = [[CBMutableCharacteristic alloc]
initWithType:emailCharacteristicUUID
properties:CBCharacteristicPropertyRead
| CBCharacteristicPropertyNotifyEncryptionRequired
value:nil permissions:CBAttributePermissionsReadEncryptionRequired];
So in your case ,some of your peripheral's characters need pair,the others don't. 因此,在您的情况下,外围设备的某些字符需要配对,而其他字符则不需要。
you can see more in CorebluetoothGuide 您可以在CorebluetoothGuide中看到更多
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