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Rust library to interact with Bluetooth devices via RFCOMM channels

License: MIT License

Rust 100.00%

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yoric opensourcegeek dushistov ypwang314 wg-romank

bluetooth-serial-port's Issues

read timeout

Hello,

I am trying to implement an application that closes the connection if the other device does not send any data.

The problem I find myself in is that the BtSocket.read() is blocking if the other device does not send any data, and killing threads is not supported (and/or safe) in rust.

Do you have any ideas on how to implement safely connection reset in case of timeout?

Reevaluate license

GPL-3 is quite restrictive for something as fundamental as RFCOMM. Please consider changing to MIT or BSD type license.

wrong data recieved via read

I want to connect with gps device via bluetooth on linux.

In console I did:

$ sudo rfcomm connect 0 10:C6:FC:FE:6D:D0 &
$ sudo cat /dev/rfcomm0
$GPGSA,A,3,08,27,11,69,14,18,77,32,,,,,2.5,1.6,1.9*35
$GPRMC,161659.5,A,5521.76350,N,03731.92747,E,000.57,058.2,040718,010.2,E,A*35
$GPGGA,161659.5,5521.76350,N,03731.92747,E,1,08,1.6,204.7,M,13.1,M,,*55
$GPVTG,058.2,T,048.0,M,000.57,N,0001.06,K,A*15

as you can see all data is is ascii, this is nmea protocol,
it is text based.

Then I modify example.rs:

extern crate bluetooth_serial_port;
extern crate mio;
use bluetooth_serial_port::{BtProtocol, BtSocket};
use std::io::Read;

fn main() {
    // scan for devices
    let devices = bluetooth_serial_port::scan_devices().unwrap();
    if devices.len() == 0 {
        panic!("No devices found");
    }

    let device = devices.iter().position(|x| x.name.contains("GLO")).unwrap();
    let device = &devices[device];
    println!("Connecting to `{}` ({})", device.name, device.addr.to_string());

    // create and connect the RFCOMM socket
    let mut socket = BtSocket::new(BtProtocol::RFCOMM).unwrap();
    socket.connect(device.addr).unwrap();

    loop {
        let mut buffer: [u8; 20] = [0; 20];
        let num_bytes_read = socket.read(&mut buffer[..]).unwrap();
        if num_bytes_read == 0 {
            println!("read nothing, retry");
        }
        let s = &buffer[0..num_bytes_read];
        println!("raw bytes: {:?}", s);
    }
}

and output is:

raw bytes: [192, 1, 22, 0, 3, 1, 0, 37, 1, 10, 1, 128, 0, 232, 3, 232, 3, 184, 207, 4]
raw bytes: [0, 19]
raw bytes: [192, 1, 22, 0, 3, 1, 0, 37, 1, 10, 1, 128, 0, 232, 3, 232, 3, 184, 207, 4]
raw bytes: [0, 19]
raw bytes: [192, 1, 22, 0, 3, 1, 0, 37, 1, 10, 1, 128, 0, 232, 3, 232, 3, 184, 207, 4]
raw bytes: [0, 19]
raw bytes: [192, 1, 22, 0, 3, 1, 0, 37, 1, 10, 1, 128, 0, 232, 3, 232, 3, 184, 207, 4]
raw bytes: [0, 19]
raw bytes: [192, 1, 22, 0, 3, 1, 0, 37, 1, 10, 1, 128, 0, 232, 3, 232, 3, 184, 207, 4]
raw bytes: [0, 19]
raw bytes: [192, 1, 22, 0, 3, 1, 0, 37, 1, 10, 1, 128, 0, 232, 3, 232, 3, 184, 207, 4]
raw bytes: [0, 19]
raw bytes: [192, 1, 22, 0, 3, 1, 0, 37, 1, 10, 1, 128, 0, 232, 3, 232, 3, 184, 207, 4]
raw bytes: [0, 19]
raw bytes: [192, 1, 22, 0, 3, 1, 0, 37, 1, 10, 1, 128, 0, 232, 3, 232, 3, 184, 207, 4]
raw bytes: [0, 19]
raw bytes: [192, 1, 22, 0, 3, 1, 0, 37, 1, 10, 1, 128, 0, 232, 3, 232, 3, 184, 207, 4]
raw bytes: [0, 19]

this looks completly wrong for me, byte with 0 value, bytes with value 1 and so on.

Implement win32 support

I'va started today work on win32 support,
so I create this issue to coordinate work on this issue.

Able to use uuid for open socket

So I tried to use you library for connection to my headphones. But they to use custom uuid for RFCOMM service.
https://github.com/Toxblh/sony-headphones-control-rust-linux as real example.
So I also wrote python prototype, with use custom uuid. And that is log from python

Searching for 70:26:05:10:48:04...
service_matches [{'service-classes': ['96CC203E-5068-46AD-B32D-E316F5E069BA'], 'profiles': [('96CC203E-5068-46AD-B32D-E316F5E069BA', 256)], 'name': None, 'description': None, 'provider': None, 'service-id': None, 'protocol': 'RFCOMM', 'port': 15, 'host': '70:26:05:10:48:04'}]

When I tried to connect via your lib I saw that error:

Error: No RFCOMM service on remote device

Will be cool if will be possible to pass also and uuid if it is custom for device.

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