No com port number

[RichardWGNR]

Problem Description

I use serialport::available_ports() to get information about the current ports.
I have the next code:

        let ports = serialport::available_ports().unwrap();
        debug!("{ports:?}");

Which outputs the following to the command line:

18:56:39 [windows] 2025-03-26T13:56:39.768815Z DEBUG ThreadId(12) tmcs_client::flash::resolver::usb_resolver: [
18:56:39 [windows]     SerialPortInfo {                                                                                                                                                                                                                                                                             
18:56:39 [windows]         port_name: "COM1",                                                                                                                                                                                                                                                                       
18:56:39 [windows]         port_type: Unknown,                                                                                                                                                                                                                                                                      
18:56:39 [windows]     },                                                                                                                                                                                                                                                                                           
18:56:39 [windows]     SerialPortInfo {                                                                                                                                                                                                                                                                             
18:56:39 [windows]         port_name: "",  // ATTENTION HERE                                                                                                                                                                                                                                                                         
18:56:39 [windows]         port_type: UsbPort(                                                                                                                                                                                                                                                                      
18:56:39 [windows]             UsbPortInfo {                                                                                                                                                                                                                                                                        
18:56:39 [windows]                 vid: 1155,                                                                                                                                                                                                                                                                       
18:56:39 [windows]                 pid: 22336,                                                                                                                                                                                                                                                                      
18:56:39 [windows]                 serial_number: Some(                                                                                                                                                                                                                                                             
18:56:39 [windows]                     "TMCS_B000000000",                                                                                                                                                                                                                                                           
18:56:39 [windows]                 ),                                                                                                                                                                                                                                                                               
18:56:39 [windows]                 manufacturer: Some(                                                                                                                                                                                                                                                              
18:56:39 [windows]                     "STMicroelectronics.",                                                                                                                                                                                                                                                       
18:56:39 [windows]                 ),                                                                                                                                                                                                                                                                               
18:56:39 [windows]                 product: Some(                                                                                                                                                                                                                                                                   
18:56:39 [windows]                     "TMCarSolutions: Common Bootloader (COM 10)",                                                                                                                                                                                                                                
18:56:39 [windows]                 ),                                                                                                                                                                                                                                                                               
18:56:39 [windows]             },                                                                                                                                                                                                                                                                                   
18:56:39 [windows]         ),                                                                                                                                                                                                                                                                                       
18:56:39 [windows]     },                                                                                                                                                                                                                                                                                           
18:56:39 [windows] ]   

As you and I can see, there is no port name for the second device.

I don't know what the problem is, and I don't know how to reproduce this on another computer.

Other programs easily recognize the COM port name of this device.

Serial Debug Assistant

Windows registry

This may be because I changed the FriendlyName of the device in the Windows registry.
I also tried changing COM 10 to COM10, but that did not work.

My environment

Package	Version
Windows	11
Rust	1.85.1
serialport	4.7.0

[RichardWGNR]

So far, I've done a workaround using the following function to which I give a string with the FriendlyName of the device.

    fn guess_com_port_from_str<S>(str: S) -> Option<String>
    where
        S: AsRef<str>
    {
        static RGX: LazyLock<Regex> = LazyLock::new(|| {
            Regex::new(r#"\(COM\s*(?<num>\d+)\s*\)"#).unwrap()
        });

        if let Some(caps) = RGX.captures(str.as_ref()) {
            let port_num = caps.name("num").unwrap().as_str();
            return Some(format!("COM{port_num}"))
        }

        None
    }

            list.insert(unique_device_sequence, UsbDevice {
                sw_name: info.product_string().map(|v| v.to_owned()),
                serial_number: sn.to_owned(),
                com_port: if device.port_name.len() > 0 {
                    device.port_name
                } else {
                    let com_port = usb_port.product
                        .as_ref()
                        .and_then(|product| Self::guess_com_port_from_str(product));

                    if let Some(port) = com_port {
                       port
                    } else {
                        continue;
                    }
                },
            });