CODEWITHSUNDEEP
ioscore-bluetoothbluetooth-lowenergycbperipheral
Creador
Creador

Reputation: 41

How to pass device UUID in CoreBluetooth framework for Client to reconnect later

I just wrote a simple app where I scan and connect to peripheral (which is also an IOS device). However the CBPeripheral object I get back from ConnectPeripheral function does not have the device UUID and it's always null. Now I am trying to understand where do I set it so that it gets passed. Here is what I am doing.

To advertise my service I am doing

NSDictionary *advertisingDict=[NSDictionary dictionaryWithObject: services forKey:CBAdvertisementDataServiceUUIDsKey]
[manager startAdvertising:advertisingDicts];

(From the framework I understand that I cannot pass the device UUID in the advertising packet. Correct me if I am wrong here)

My client scan for the service and gets into the function

centralManager:(CBCentralManager *)central didDiscoverPeripheral:(CBPeripheral *)peripheral

And as expected the peripheral.uuid is null. If I call connectPeripheral on this peripheral it works fine too. I am not sure how it understands which device to connect when the uuid is null. Also what would I need to do If I want to reconnect later. How do I fill this uuid?

Upvotes: 4

Views: 2134

Answers (1)

Aboelseoud
Aboelseoud

Reputation: 555

It has a work around. You can pass it instead of the local name of the device like this:

[self.peripheralManager startAdvertising:@{CBAdvertisementDataLocalNameKey : *the UUID*}];

And in the other device in the didDiscoverPeripheral function you can get it like this:

[advertisementData objectForKey:@"kCBAdvDataLocalName"]

Upvotes: 1

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