Find serial port where my device is connected
serial-port, vb.net
Solution
Based on the comments it sounds like your device is a USB device that has a driver that causes it to appear to be (emulates) a serial port attached device. In that case I would use:
My.Computer.Ports.SerialPortNames
to enumerate and loop over all serial ports. Then, one at a time try to open each one and send a command to the device that you know it responds to. Most devices have some kind of heartbeat or keep alive message that they will respond to. Whichever port you get a response on is the port you need to use.
Problem
I'm starting to work with a pinpad. I need that my program find the port where the pinpad is connected without user interaction. I tried with: ``` Dim searcher As New ManagementObjectSearcher("root\cimv2","SELECT * FROM Win32_SerialPort") For Each queryObj As ManagementObject In searcher.Get() MsgBox(queryObj("Name")) Next ``` but this only give me "COM1" and "COM2" as an answer (My device is connected to COM4) and with ``` Dim searcher As New ManagementObjectSearcher("root\cimv2", "SELECT * FROM Win32_PnPEntity WHERE ConfigManagerErrorCode = 0") For Each queryObj As ManagementObject In searcher.Get() MsgBox(queryObj("Name")) Next ``` With this one I can see my device friendly name but I don´t know how to get the port (I receive the names like 'HP printer') Any idea of how can I get the port that I need? Thanks in advance