How do I avoid os: error 111 (connection refused).

[StratusFearMe21]

Hello, I am attempting to make a lightweight device driver for the LG Magic Remote. However, when I try to connect to it through l2cap it errors out with an os error 111. This is my code so far. It just tries to connect to the Magic Remote and it begins to receive packets.

use bluer::{
    l2cap::{SocketAddr, Stream, PSM_LE_DYN_START},
    Address,
};
use tokio::io::AsyncReadExt;

#[tokio::main]
async fn main() -> bluer::Result<()> {
    let addr: Address = "7C:02:BC:C5:14:3B".parse().unwrap();
    let socket_addr = SocketAddr::new(addr, bluer::AddressType::LePublic, PSM_LE_DYN_START + 5);
    println!("Connecting to magic remote");
    let mut stream = Stream::connect(socket_addr).await?;
    println!("Local address: {:?}", stream.as_ref().local_addr()?);
    println!("Remote address: {:?}", stream.peer_addr()?);
    println!("Recv MTU: {}", stream.as_ref().recv_mtu()?);
    println!("Security: {:?}", stream.as_ref().security()?);

    loop {
        let mut hello_buf = [0u8; 30];
        stream
            .read_exact(&mut hello_buf)
            .await
            .expect("read failed");
        println!("Received: {:?}", hello_buf);
    }
}

This is what it prints out

Connecting to magic remote
Local address: SocketAddr { addr: E0:D4:E8:38:4D:65, addr_type: LePublic, psm: 133, cid: 64 }
Remote address: SocketAddr { addr: 7C:02:BC:C5:14:3B, addr_type: LePublic, psm: 133, cid: 0 }
Recv MTU: 672
Security: Security { level: Medium, key_size: 0 }
thread 'main' panicked at 'read failed: Os { code: 111, kind: ConnectionRefused, message: "Connection refused" }', src/main.rs:23:14
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

Any ideas? Thanks!

[StratusFearMe21]

P.S there's no evidence of errors caused by app when I run it and then run sudo systemctl status bluetooth

[surban]

1. Are you sure that the LG Magic Remote is accepting L2CAP connections?
2. Are you sure that the port number is correct (PSM_LE_DYN_START + 5 in your case)?