Cannot get "onStateChanged" working

[PietroGranati]

Mobile Device Environment

• Device: [iPad mini]

Application Environment

• RN Bluetooth Classic version: 1.60.0-rc.20]

Describe the bug I cannt made work the events "onStateChanged" "onBluetoothEnabled" "onBluetoothDisabled", the onDevice connect works perfectly instead anche i cannot figure out what is wrong

To Reproduce

useEffect(() => {
        const subscription = RNBluetoothClassic.onStateChanged((e) => { console.log(e.enabled) });

        return function cleanup() {
            subscription.remove();
        };
    }, []);

[kenjdavidson]

Are those even available on IOS? Can you check the documentation? The MFi and ExternalAccessory on IOS has limited functionality and those might not even be available.

[kenjdavidson]

I have some notes saying that I need to see if the CoreBluetooth library can be used for those types of things.

[PietroGranati]

The in the official documentation they're avaiable for both

[PietroGranati]

I'll investigate more

[kenjdavidson]

haha "official" of this library? Could be wrong - you're trusting me a whole bunch.

Looking at the IOS code, there is only registration for:

• BTEvent.BLUETOOTH_CONNECTED
• BTEvent.BLUETOOTH_DISCONNECTED

Looking at the available notifications: https://developer.apple.com/documentation/foundation/nsnotification/name there are only two that are used:

• EAAccesoryDidConnect
• EAAccessoryDiddisconnect

there are a couple others that maybe might work for Enabled/Disabled/State Change:

• IOBluetoothHoseControllerPoweredOff??
• IOBluetoothHostControllerPoweredON??

No idea really.

[kenjdavidson]

Feel free to play around with it and add those registered notifications to:

    /**
     Register with the NotificationCenter and add all appropriate Observers.  Currently the available
     notification types are:
     - .EAAccessoryDidConnect = BTEvent.BLUETOOTH_CONNECTED
     - .EAAccessoryDidDisconnect = BTEvent.BLUETOOTH_DISCONNECTED
     using the appropriate BTEvent type(s)
     */
    private func registerForLocalNotifications() {
        eaManager.registerForLocalNotifications()
        notificationCenter.addObserver(self,
                                       selector: #selector(accessoryDidConnect),
                                       name: .EAAccessoryDidConnect,
                                       object: nil)
        notificationCenter.addObserver(self,
                                       selector: #selector(accessoryDidDisconnect),
                                       name: .EAAccessoryDidDisconnect,
                                       object: nil)
    }

And throw in a pull request, i'd be happy to accept it if you say it works.

[PietroGranati]

Ahah yes of this library, it's a great module however! I'm not so good at IOS coding but I'll give it a try in these days.

Thank you!

[kenjdavidson]

I'm not so good at IOS coding but I'll give it a try in these days.

Join the club!!

I would play around with something like:

private func registerForLocalNotifications() {
        eaManager.registerForLocalNotifications()
        notificationCenter.addObserver(self,
                                       selector: #selector(accessoryDidConnect),
                                       name: .EAAccessoryDidConnect,
                                       object: nil)
        notificationCenter.addObserver(self,
                                       selector: #selector(accessoryDidDisconnect),
                                       name: .EAAccessoryDidDisconnect,
                                       object: nil)

        notificationCenter.addObserver(self,
                                       selector: #selector(bluetoothPoweredOn),
                                       name: .IOBluetoothHostControllerPoweredOff,
                                       object: nil)
    }

@objc
    func  bluetoothPoweredOn(_ notification:Notification) {
            sendEvent(EventType.BLUETOOTH_ENABLED.name,
                      body: (simulate whatever Android sends now)
            sendEvent(EventType.STATE_CHANGED.name,
                      body: (simulate whatever Android sends now)
    }