how to know bluetooth device connected to app

[pepe-dunamu]

Mobile Device Environment On which device(s) would you like this feature to be implemented. If Android only, the IOS implementations must be created as well - keep not of this for your pull requests.

• Device: [e.g. Android, iPhone6]
• OS: [e.g. API19, Nouget, iOS8.1]

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Describe the solution you'd like A clear and concise description of what you want to happen. If you've researched the available libraries, feel free to add notes or implementation details as you see fit.

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i just read onDeviceConnected removed that was exactly what i want what should i do??

[kenjdavidson]

Could you provide more information? I don't understand what you're asking.

[pepe-dunamu]

I just want to know when the Bluetooth device is connected in the app just exactly opposite side of onDeviceDisconnected btw i am testing with aos device

[kenjdavidson]

First you need to understand the definitions of the functions and how bluetooth works. With regards to this application:

• Paired = the bluetooth device becomes paired with the phone
• Connected = the bluetooth device and device successfully create an RFCOMM socket

The original onDeviceConnected referred to the RFCOMM socket being opened (this is why there is a PR to remove it). It makes no sense because await connectToDevice() returns back when it's successful, or throws when it is not successful.

onDeviceDisconnected is required as the RFCOMM socket could be closed for any number of reasons.

[pepe-dunamu]

thanks for your reply I want an event listener or custom hook state value provided when the Bluetooth headset is connected or paired i just want something like this, If it's paired or connected, you can see the Bluetooth icon and If the pairing is broken, I want to show an icon that can't be bluetooth so onDeviceDisconnected can make me to show a bluetooth disabled icon, but how can i show bluetooth enabled icon? What should I do to do that?

[kenjdavidson]

Well:

1) There is no BluetoothAdapter functionality for listening for a paired/bonded device. Therefore there is no way to provide this functionality to React Native. The only way to do this would be to set a timeout that continually polls for bonded/paired devices and does something when it finds the device you're looking for.

2) Bluetooth headsets use the A2DP protocol, which this library is not designed for. So there is no way within this library to wrap the functionality for an A2DP connection to be monitored. The BluetoothHeadset is deep in Android and not something that this library will be responsible for. If you wish to add your own custom DeviceConnector implementation then you can do so, but I don't see it as being part of this specific library.

3) onDeviceDisconnected is only fired when a device is disconnected, ie. the RFCOMM socket is broken by anything that didn't call device.disconnect()

There have been a number of discussions about Headsets, and I'll be honest that's not what I wrote this library for, nor plan on really implementing directly.

[kenjdavidson]

I would suggest implementing a library that takes advantage of A2DP and the BluetoothHeadset protocol.

[pepe-dunamu]

thank you for your kind reply I learned a lot :)