CoreBluetooth devices has only default properties

[Felipe Azevedo]

I made a simple straight forward script to scan devices and list their local_name attribute and if their connected or not.

use std::error::Error;
use std::time::Duration;
use tokio::time;

use btleplug::api::{Central, Manager as _, Peripheral, ScanFilter};
use btleplug::platform::Manager;

#[tokio::main]
async fn main() -> Result<(), Box<dyn Error>> {
    //pretty_env_logger::init();

    let manager = Manager::new().await?;
    let adapter_list = manager.adapters().await?;
    if adapter_list.is_empty() {
        eprintln!("No Bluetooth adapters found");
    }

    for adapter in adapter_list.iter() {
        println!("Starting scan on {}...", adapter.adapter_info().await?);
        adapter
            .start_scan(ScanFilter::default())
            .await
            .expect("Can't scan BLE adapter for connected devices...");
        time::sleep(Duration::from_secs(20)).await;
        let peripherals = adapter.peripherals().await?;
        if peripherals.is_empty() {
            eprintln!("->>> BLE peripheral devices were not found, sorry. Exiting...");
        } else {
            // All peripheral devices in range
            for peripheral in peripherals.iter() {
                let properties = peripheral.properties().await?;
                let is_connected = peripheral.is_connected().await?;
                let local_name = properties
                    .unwrap()
                    .local_name
                    .unwrap_or(String::from("(peripheral name unknown)"));
                println!(
                    "Peripheral {:?} is connected: {:?}",
                    local_name, is_connected
                );
            }
        }
    }
    Ok(())
}

But it doesn't show correctly its properties. (And the devices has correct name properties, as shown on bluetooth MacOS Settings)

$ cargo run
    Finished dev [unoptimized + debuginfo] target(s) in 0.13s
     Running `target/debug/bluetooth-scan`
Starting scan on CoreBluetooth...
Peripheral "(peripheral name unknown)" is connected: false
Peripheral "(peripheral name unknown)" is connected: false
Peripheral "(peripheral name unknown)" is connected: false

Am I doing something wrong or forgetting to do something?
Or is it CoreBluetooth's fault?

(And yes, terminal is enabled for bluetooth usage on privacy settings already.)