Can't detect device in Windows 7

[pcparklin]

I followed the user guide, but can't detect device either by autodetecting or specifying serial port.
After modifying serial port detecting part in s2m.py, I can detect device either by autodetecting or specifying serial port now.

Original code:

# if no com port was specified, try doing auto discover.
if com_port is None:
    print('Autodetecting serial port. Please wait...')
    if sys.platform.startswith('darwin'):
        locations = glob.glob('/dev/tty.[usb*]*')
        locations = glob.glob('/dev/tty.[wchusb*]*') + locations
        locations.append('end')
        # for everyone else, here is a list of possible ports
    else:
        locations = ['dev/ttyACM0', '/dev/ttyACM0', '/dev/ttyACM1',
                        '/dev/ttyACM2', '/dev/ttyACM3', '/dev/ttyACM4',
                        '/dev/ttyACM5', '/dev/ttyUSB0', '/dev/ttyUSB1',
                        '/dev/ttyUSB2', '/dev/ttyUSB3', '/dev/ttyUSB4',
                        '/dev/ttyUSB5', '/dev/ttyUSB6', '/dev/ttyUSB7',
                        '/dev/ttyUSB8', '/dev/ttyUSB9',
                        '/dev/ttyUSB10',
                        '/dev/ttyS0', '/dev/ttyS1', '/dev/ttyS2',
                        '/dev/tty.usbserial', '/dev/tty.usbmodem', 'com2',
                        'com3', 'com4', 'com5', 'com6', 'com7', 'com8',
                        'com9', 'com10', 'com11', 'com12', 'com13',
                        'com14', 'com15', 'com16', 'com17', 'com18',
                        'com19', 'com20', 'com21', 'com22', 'com23', 'com24',
                        'com25', 'com26', 'com27', 'com28', 'com29', 'com30',
                        'com31', 'com32', 'com33', 'com34', 'com35', 'com36',
                        'com1', 'end'
                        ]

    detected = None
    for device in locations:
        try:
            self.micro_bit_serial = serial.Serial(port=device, baudrate=115200,
                                                    timeout=.1)
            detected = device
            break
        except serial.SerialException:
            if device == 'end':
                print('Unable to find Serial Port, Please plug in '
                        'cable or check cable connections.')
                detected = None
                exit()
        except OSError:
            pass
    self.com_port = detected

Modified:

# if no com port was specified, try doing auto discover.
if com_port is None:
    print('Autodetecting serial port. Please wait...')

    # listing all serial ports and checking if there is a micro:bit board
    import re
    from serial.tools.list_ports import comports
    for port, desc, opts in comports():
        if 'VID:PID=' in opts:
            vid, pid = re.search('VID:PID=(\w+):(\w+)', opts).groups()
            vid, pid = int(vid, 16), int(pid, 16)
            if vid == 0x0D28 and pid == 0x0204:
                self.com_port = port
                break

if self.com_port is None:
    print('Unable to detect Serial Port, Please plug in '
                'cable or check cable connections.')
    sys.exit(0)

F.Y.I.
ref: ntoll/microrepl

[MrYsLab]

Some questions:
1.What port are you using.
2. What version of pyserial do you have installed?
3. What version of python are you using?

[pcparklin]

1. I'm using COM4 now.
2. pyserial: 3.4
3. python: 3.6.4

[MrYsLab]

2 more questions:

1. Are you running in a virtual environment?
2. What program are you using to flash the micro:bit? If it is Mu, would you know approximately when you installed it?

[pcparklin]

1. No
2. Mu, after scratch and python are installed.

[MrYsLab]

I will try to reproduce what you are seeing later today and will let you know the outcome.

[MrYsLab]

I was able to reproduce the issue you had with manually setting the com port and that has been repaired in version 2.0. I cannot reproduce the auto detect issue. I do not have Windows 7, but doubt if that is the cause of your problem. I tested on Windows 10.

I had tried the same code you provided for auto-detection earlier in the development stages but had issues with it working across all platforms. In addition, it requires a driver to be installed for Windows usage, and many schools are very reluctant to have any drivers installed on their machines. Therefore, I will be keeping the auto-detection as-is.

Please try version 2.0 and manually specifying the com port with the -p command line option.

I will be closing this issue, but if you are still having problems, please leave a comment here, and I will reopen it if necessary.

Thanks.

[pcparklin]

I tried version 2.0 and -p command works, but I need autodetecting in class indeed...
I tried to find out the problem and found that the program will just use first (not micro:bit device) in [locations].
Below is the outcome:

[MrYsLab]

I am not sure I understand. Is there a device plugged into COM2 and that is why it is stopping there?

[pcparklin]

I think COM2 is used by Intel Chipset which is part of motherboard.

[MrYsLab]

I will look at this to see if I can come up with a fix.