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dotintent / FlutterBleLib

Bluetooth Low Energy library for Flutter with support for simulating peripherals
Apache License 2.0
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Cannot reconnect to a connected Peripheral #551

Open claudeHasler opened 3 years ago

claudeHasler commented 3 years ago

I am connecting successfully to a peripheral, however if my app is pushed into the background and later resumed I cannot scan for the peripheral as it is still connected.

I assumed getConnectedPeripherals() was used for this, however I am not receiving any Peripherals from this method. Should this method be working on Android?

I also tried to call destroyClient() in the hope that it would clear the surviving connection and allow the peripheral to become scannable again.

Is there any way, short of disabling and enabling the radio, to reset all active connections?

mikolak commented 3 years ago

Hi!

You can now save the id and construct peripheral using bleManager.createUnsafePeripheral(). Once you have the peripheral just try to connect with catching error or call isConnected first.

Due to legacy reasons current implementation of connectedDevices returns only peripherals that were connected through this instance of the library. I'm also not sure if it is possible to retrieve all connected peripherals on the system level, but it's on our research list.

claudeHasler commented 3 years ago

Is this a crossplatform solution or Android only? If Android only what is the iOS solution?

Thanks for the great work so far, and fast reply :)

claudeHasler commented 3 years ago

I can confirm that this works as described above on Android, iOS tests will be performed eventually.

What is the expected behaviour of using createUnsafePeripheral with an invalid id?

mikolak commented 3 years ago

Should work as well on iOS. Be sure to use the timeout parameter, as it will complete the connection attempt in finite time on both platforms.