Retrieving Peripheral for Connected Device

[Maartens-Mathew]

So I've looked at the documentation, but I could've skipped over some important details.

I have a BLE peripheral device that is already connected to my android device. I have the mac address and it's name.

Now when I use the scanner and I want to scan for the device with these details, then it doesn't pick it up (naturally), because the device is already connected and bonded. Is there a way for me to retrieve a reference to this device, and still use it with this library for things like observing characteristics?

So something along the lines of this:

val address = "2A:B3:..."
val peripheral = Peripheral(address)
peripheral.connect()
peripheral.observe(...)

For the time being, I'm more focused on getting it to work for Android platform. I can afford to wait for other platforms.

[zerodea]

What are you having trouble with specifically? With a mac address you can retrieve a Peripheral in Android specific code. There is this function:

public fun Peripheral(
    identifier: Identifier,
    builderAction: PeripheralBuilderAction = {},
): Peripheral

and you can use it like this:

val address = "2A:B3:..."
val peripheral = Peripheral(address.toIdentifier())

[Maartens-Mathew]

Ohh okay I think I see it now. I was only using Kable in commonMain. Yes it works, thank you.

So just to clarify, we'd then use expect/actual to get the peripherals per platform, but we can freely keep main Kable code in the commonMain?

Also, does Kable support mac address resolving automatically? I know it's somewhat of a default standard where the mac addresses rotate, so it's not like I can save the mac address and expect it to stay the same each time?

[zerodea]

Yes, you can keep the rest of the code in the commonMain and add expect actual for your own fun String.toPeripheral function or whatever.

I think to achieve what you want you have to request the peripheral's identifier once the peripheral has been paired. After pairing the devices exchange keys and then the mac should be static. If you look at the Peripheral file it says that the Identifier remains relatively stable. If you store the Identifier that you see in an Advertisement then the Identifier can and will change