CoreBluetooth establish peripheral connection when app is terminated

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I have an iOS app which acts as a central that connects to an external peripheral via CoreBluetooth.

After I have connected to the peripheral, I read and write data to it and then disconnect. Upon disconnect, I try to establish a connection once again so the next time the peripheral goes into advertise mode, the app will connect to it like so:

func centralManager(_ central: CBCentralManager, didDisconnectPeripheral peripheral: CBPeripheral, error: Error?) {

    central.connect(peripheral, options: nil)

    // More actions here...

}

It works great when the app is in the foreground / background, but when terminated, it doesn't work at all.

I have defined the CBCentralManager with the CBCentralManagerOptionRestoreIdentifierKey like so:

self.central = CBCentralManager(delegate: self, queue: nil, options: [CBCentralManagerOptionRestoreIdentifierKey: Application.bluetoothRestoreIdentifier])

I have also implemented the willRestoreState central delegate method:

func centralManager(_ central: CBCentralManager, willRestoreState dict: [String : Any])

What am I doing wrong?

Thanks a lot!

edited Nov 22 at 18:58

Paulw11

66.7k1080100

asked Nov 22 at 15:55

EpicSyntax

751724

What do you do in the willRestoreState function?
– Paulw11
Nov 22 at 19:02

@Paulw11 getting the peripheral again from the dict[CBCentralManagerRestoredStatePeripheralsKey] and trying to connect to it.
– EpicSyntax
Nov 25 at 12:41

add a comment |

up vote
1
down vote

favorite

I have an iOS app which acts as a central that connects to an external peripheral via CoreBluetooth.

func centralManager(_ central: CBCentralManager, didDisconnectPeripheral peripheral: CBPeripheral, error: Error?) {

    central.connect(peripheral, options: nil)

    // More actions here...

}

It works great when the app is in the foreground / background, but when terminated, it doesn't work at all.

I have defined the CBCentralManager with the CBCentralManagerOptionRestoreIdentifierKey like so:

self.central = CBCentralManager(delegate: self, queue: nil, options: [CBCentralManagerOptionRestoreIdentifierKey: Application.bluetoothRestoreIdentifier])

I have also implemented the willRestoreState central delegate method:

func centralManager(_ central: CBCentralManager, willRestoreState dict: [String : Any])

What am I doing wrong?

Thanks a lot!

edited Nov 22 at 18:58

Paulw11

66.7k1080100

asked Nov 22 at 15:55

EpicSyntax

751724

What do you do in the willRestoreState function?
– Paulw11
Nov 22 at 19:02

@Paulw11 getting the peripheral again from the dict[CBCentralManagerRestoredStatePeripheralsKey] and trying to connect to it.
– EpicSyntax
Nov 25 at 12:41

add a comment |

up vote
1
down vote

favorite

I have an iOS app which acts as a central that connects to an external peripheral via CoreBluetooth.

func centralManager(_ central: CBCentralManager, didDisconnectPeripheral peripheral: CBPeripheral, error: Error?) {

    central.connect(peripheral, options: nil)

    // More actions here...

}

It works great when the app is in the foreground / background, but when terminated, it doesn't work at all.

I have defined the CBCentralManager with the CBCentralManagerOptionRestoreIdentifierKey like so:

self.central = CBCentralManager(delegate: self, queue: nil, options: [CBCentralManagerOptionRestoreIdentifierKey: Application.bluetoothRestoreIdentifier])

I have also implemented the willRestoreState central delegate method:

func centralManager(_ central: CBCentralManager, willRestoreState dict: [String : Any])

What am I doing wrong?

Thanks a lot!

edited Nov 22 at 18:58

Paulw11

66.7k1080100

asked Nov 22 at 15:55

EpicSyntax

751724

I have an iOS app which acts as a central that connects to an external peripheral via CoreBluetooth.

func centralManager(_ central: CBCentralManager, didDisconnectPeripheral peripheral: CBPeripheral, error: Error?) {

    central.connect(peripheral, options: nil)

    // More actions here...

}

It works great when the app is in the foreground / background, but when terminated, it doesn't work at all.

I have defined the CBCentralManager with the CBCentralManagerOptionRestoreIdentifierKey like so:

self.central = CBCentralManager(delegate: self, queue: nil, options: [CBCentralManagerOptionRestoreIdentifierKey: Application.bluetoothRestoreIdentifier])

I have also implemented the willRestoreState central delegate method:

func centralManager(_ central: CBCentralManager, willRestoreState dict: [String : Any])

What am I doing wrong?

Thanks a lot!

ios swift core-bluetooth

edited Nov 22 at 18:58

Paulw11

66.7k1080100

asked Nov 22 at 15:55

EpicSyntax

751724

edited Nov 22 at 18:58

Paulw11

66.7k1080100

asked Nov 22 at 15:55

EpicSyntax

751724

edited Nov 22 at 18:58

Paulw11

66.7k1080100

edited Nov 22 at 18:58

Paulw11

66.7k1080100

edited Nov 22 at 18:58

Paulw11

66.7k1080100

asked Nov 22 at 15:55

EpicSyntax

751724

asked Nov 22 at 15:55

EpicSyntax

751724

asked Nov 22 at 15:55

EpicSyntax

751724

What do you do in the willRestoreState function?
– Paulw11
Nov 22 at 19:02

@Paulw11 getting the peripheral again from the dict[CBCentralManagerRestoredStatePeripheralsKey] and trying to connect to it.
– EpicSyntax
Nov 25 at 12:41

add a comment |

What do you do in the willRestoreState function?
– Paulw11
Nov 22 at 19:02

@Paulw11 getting the peripheral again from the dict[CBCentralManagerRestoredStatePeripheralsKey] and trying to connect to it.
– EpicSyntax
Nov 25 at 12:41

What do you do in the willRestoreState function?
– Paulw11
Nov 22 at 19:02

@Paulw11 getting the peripheral again from the dict[CBCentralManagerRestoredStatePeripheralsKey] and trying to connect to it.
– EpicSyntax
Nov 25 at 12:41

add a comment |

2 Answers
2

active

oldest

votes

up vote
0
down vote

You can save the peripheral's identifier. Then connect to the peripheral depending on the identifier.

answered Nov 23 at 1:40

dowZhang

448

add a comment |

up vote
0
down vote

Try with below code

func centralManager(_ central: CBCentralManager, willRestoreState dict: [String : Any]) {

        let connectedperipherals = dict[CBCentralManagerRestoredStatePeripheralsKey] as? [CBPeripheral]

        if let peripheral = connectedperipherals?.first {

            central.connect(peripheral, options: nil)

        }

    }

answered Nov 23 at 5:20

iOS_Maccus

3069

This is exactly what I am doing. I think my problem is not when the app is terminated by the system, I think it's when the app is terminated by the user. Does that make any difference?
– EpicSyntax
Nov 25 at 12:46

add a comment |

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2 Answers
2

active

oldest

votes

2 Answers
2

active

oldest

votes

up vote
0
down vote

You can save the peripheral's identifier. Then connect to the peripheral depending on the identifier.

answered Nov 23 at 1:40

dowZhang

448

add a comment |

up vote
0
down vote

You can save the peripheral's identifier. Then connect to the peripheral depending on the identifier.

answered Nov 23 at 1:40

dowZhang

448

add a comment |

up vote
0
down vote

You can save the peripheral's identifier. Then connect to the peripheral depending on the identifier.

answered Nov 23 at 1:40

dowZhang

448

You can save the peripheral's identifier. Then connect to the peripheral depending on the identifier.

answered Nov 23 at 1:40

dowZhang

448

answered Nov 23 at 1:40

dowZhang

448

answered Nov 23 at 1:40

dowZhang

448

answered Nov 23 at 1:40

dowZhang

448

add a comment |

up vote
0
down vote

Try with below code

func centralManager(_ central: CBCentralManager, willRestoreState dict: [String : Any]) {

        let connectedperipherals = dict[CBCentralManagerRestoredStatePeripheralsKey] as? [CBPeripheral]

        if let peripheral = connectedperipherals?.first {

            central.connect(peripheral, options: nil)

        }

    }

answered Nov 23 at 5:20

iOS_Maccus

3069

This is exactly what I am doing. I think my problem is not when the app is terminated by the system, I think it's when the app is terminated by the user. Does that make any difference?
– EpicSyntax
Nov 25 at 12:46

add a comment |

up vote
0
down vote

Try with below code

func centralManager(_ central: CBCentralManager, willRestoreState dict: [String : Any]) {

        let connectedperipherals = dict[CBCentralManagerRestoredStatePeripheralsKey] as? [CBPeripheral]

        if let peripheral = connectedperipherals?.first {

            central.connect(peripheral, options: nil)

        }

    }

answered Nov 23 at 5:20

iOS_Maccus

3069

This is exactly what I am doing. I think my problem is not when the app is terminated by the system, I think it's when the app is terminated by the user. Does that make any difference?
– EpicSyntax
Nov 25 at 12:46

add a comment |

up vote
0
down vote

Try with below code

func centralManager(_ central: CBCentralManager, willRestoreState dict: [String : Any]) {

        let connectedperipherals = dict[CBCentralManagerRestoredStatePeripheralsKey] as? [CBPeripheral]

        if let peripheral = connectedperipherals?.first {

            central.connect(peripheral, options: nil)

        }

    }

answered Nov 23 at 5:20

iOS_Maccus

3069

Try with below code

func centralManager(_ central: CBCentralManager, willRestoreState dict: [String : Any]) {

        let connectedperipherals = dict[CBCentralManagerRestoredStatePeripheralsKey] as? [CBPeripheral]

        if let peripheral = connectedperipherals?.first {

            central.connect(peripheral, options: nil)

        }

    }

answered Nov 23 at 5:20

iOS_Maccus

3069

answered Nov 23 at 5:20

iOS_Maccus

3069

answered Nov 23 at 5:20

iOS_Maccus

3069

answered Nov 23 at 5:20

iOS_Maccus

3069

This is exactly what I am doing. I think my problem is not when the app is terminated by the system, I think it's when the app is terminated by the user. Does that make any difference?
– EpicSyntax
Nov 25 at 12:46

add a comment |

This is exactly what I am doing. I think my problem is not when the app is terminated by the system, I think it's when the app is terminated by the user. Does that make any difference?
– EpicSyntax
Nov 25 at 12:46

This is exactly what I am doing. I think my problem is not when the app is terminated by the system, I think it's when the app is terminated by the user. Does that make any difference?
– EpicSyntax
Nov 25 at 12:46

add a comment |

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