watcher.SetUseCodedPhy(true) breaks scanning on Windows

maybe related: #472

I just upgraded from btleplug 0.12.0 to 0.13.0.

Now, scanning no longer yields any events on my Windows System.

use btleplug::api::{Central, Manager as _, ScanFilter};
use btleplug::platform::Manager;
use futures_util::StreamExt as _;
use std::error::Error;
use std::time::Duration;

#[tokio::main]
async fn main() -> Result<(), Box<dyn Error>> {
    let manager = Manager::new().await.unwrap();

    // get the first bluetooth adapter
    let adapters = manager.adapters().await?;
    let central = adapters.into_iter().nth(0).unwrap();

    let mut events = central.events().await?;

    central.start_scan(ScanFilter::default()).await?;
    let _ = tokio::time::timeout(Duration::from_secs(2), async {
        loop {
            println!("{:?}", events.next().await.unwrap());
        }
    })
    .await;
    let _ = central.stop_scan().await;

    Ok(())
}

Expected behavior
A lot of printed lines containing discovery events of the BLE devices around me.

Actual behavior
Absolutely nothing.

Additional context
When I comment out the line let _ = self.watcher.SetUseCodedPhy(true); in src\winrtble\ble\watcher.rs:84, it works as expected.

System informations

I'm on Windows 11.
My BLE adapter is a tp-link UB400.

@Finomnis

@Finomnis, thanks for reporting this issue.

Could you test the fix in #474 on your UB400? Point your test program at the branch:

btleplug = { git = "https://github.com/Poholos/btleplug", branch = "fix/gate-coded-phy-on-adapter-support" }

Scan events coming back would confirm it on the failing side; I only have a Coded-capable adapter here.

I can confirm that your [patch.crates-io] section fixes my problem, while it is still broken on

btleplug = { git = "https://github.com/deviceplug/btleplug", branch = "master" }

(just to confirm that nothing else between 0.13.0 and master already fixed it)

Do you plan to release this as a 0.13.1 hot fix within the next days by any chance?

@qdot

Do you plan to release this as a 0.13.1 hot fix within the next days by any chance?

@qdot and/or @qwandor might be able to answer that.

0.13.1 will probably land today. I was about to hit release on my software w/ this dependency, of which 70% of the userbase is windows on who knows what kind of adapter, so I'd rather be safe than sorry. :)

0.13.1 will probably land today.

You might want to yank 0.13.0 afterwards :)

fix(winrtble): request Coded PHY scanning only when the adapter suppo…

@Finomnis

@Finomnis 0.13.1 is out, 0.13.0 yanked.

Ok, this didn't get completely fixed until 0.13.4. Coded phy is now off by default and set_use_coded_phy(true) is now explicitly required.

fix(winrtble): Keep the Coded PHY toggle behind the adapter support c…

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`watcher.SetUseCodedPhy(true)` breaks scanning on Windows #473

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watcher.SetUseCodedPhy(true) breaks scanning on Windows #473

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userepo commented on Sep 17, 2026

Finomnis commented on Sep 17, 2026

Finomnis commented on Sep 17, 2026

userepo commented on Sep 17, 2026

qdot commented on Sep 17, 2026

Finomnis commented on Sep 17, 2026

qdot commented on Sep 17, 2026

qdot commented on Oct 3, 2026

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`watcher.SetUseCodedPhy(true)` breaks scanning on Windows #473