A modern programming language that makes developers happier.

kotlinlang

image.png

I'm having another issue where when I change scan filter=null I can get serviceUuid show  like the screenshot, But actually the serviceUuid is "000000F4-0000-1000-8000-00805F9B34FB" than "000000FF-0000-1000-8000-00805F9B34FB".

It appears your peripheral is advertising `000000FF-0000-1000-8000-00805F9B34FB` service, so that is the UUID you should use for the `Scanner` service filter.

```Scanner {
    filters {
        match {
            services = listOf(uuidFrom("000000FF-0000-1000-8000-00805F9B34FB"))
        }
    }
}```
The actual peripheral services/characteristic UUIDs may differ from what are advertised. You can examine the the service/characteristic UUIDs that are available (after connecting) using <https://play.google.com/store/apps/details?id=no.nordicsemi.android.mcp&hl=en_US|nRF Connect>.

I use LBE tools to test, serviceUuid is "000000F4-0000-1000-8000-00805F9B34FB"

That looks like a service & associated characteristic that you can transfer data with (read, write or observe) once you've connected. :+1:

Thanks, When I add filters like as below
```filters {
    Filter.Service(SERVICE_UUID)
    Filter.Name.Prefix("H03_")
}```
I scan many devices that prefix is not H03_

Filters can be combined via either `AND` or `OR` logic:

```filters {
    match {
        filter1
        AND
        filter2
        AND
        filterN
        ..
    }
    OR
    match {
        filter1
        AND
        filter2
        AND
        filterN
        ..
    }
}```
For your specific example, you could do either of the following:

```filters {
    match {
        services = listOf(SERVICE_UUID)
        // AND
        name = Filter.Name.Prefix("H03_")
    }
}```
```filters {
    match {
        services = listOf(SERVICE_UUID)
    }
    // OR
    match {
        name = Filter.Name.Prefix("H03_")
    }
}```
