nrf_sniffer_ble.sh return OSError: [Errno 22] Invalid argument

[Stephane_L]

Hello,

I follow the doc to install the nrf_sniffer_for_bluetooth_le_4.1.0

- Flashing the nRF52840 dongle with nRF Connect for Desktop 

Uploading image through SDFU: 97%

Uploading image through SDFU: 98%

Uploading image through SDFU: 100%

All dfu images have been written to the target device

Failed to write: Timeout while waiting for device xxx to be attached and enumerated

Is this error OK ?

Downloading nrf_sniffer_for_bluetooth_le_4.1.0

- Update all python softwares

and run 

nrf_sniffer_ble.sh --extcap-interfaces

It crash 

extcap {version=4.1.0}{display=nRF Sniffer for Bluetooth LE}{help=www.nordicsemi.com/.../nRF-Sniffer-for-Bluetooth-LE}

Traceback (most recent call last):

  File "./nrf_sniffer_ble.py", line 818, in <module>

    extcap_interfaces()

  File "./nrf_sniffer_ble.py", line 170, in extcap_interfaces

    for interface_port in get_interfaces():

  File "./nrf_sniffer_ble.py", line 160, in get_interfaces

    devices = UART.find_sniffer()

  File "nrf_sniffer_for_bluetooth_le_4.1.0/extcap/SnifferAPI/UART.py", line 68, in find_sniffer

    reader = Packet.PacketReader(portnum=port, baudrate=rate)

  File "nrf_sniffer_for_bluetooth_le_4.1.0/extcap/SnifferAPI/Packet.py", line 74, in __init__

    self.uart = UART.Uart(portnum, baudrate)

  File "nrf_sniffer_for_bluetooth_le_4.1.0/extcap/SnifferAPI/UART.py", line 130, in __init__

    self.ser.baudrate = baudrate

  File "Library/Python/3.8/lib/python/site-packages/serial/serialutil.py", line 299, in baudrate

    self._reconfigure_port()

  File "Library/Python/3.8/lib/python/site-packages/serial/serialposix.py", line 524, in _reconfigure_port

    self._set_special_baudrate(custom_baud)

  File "Library/Python/3.8/lib/python/site-packages/serial/serialposix.py", line 225, in _set_special_baudrate    fcntl.ioctl(self.fd, IOSSIOSPEED, buf, 1)

OSError: [Errno 22] Invalid argument

macOS 12.1, python 3.8

[Stephane_L]

UPDATE.

I did the same installation on a 10.15 mac and it works. Wireshark is updated. But on Monterey its seems to be another story.

[Vidar Berg]

Hi,

Thanks for the report. I don't think I have seen this before. I will have to do some investigation and get back to you.

Best regards,

Vidar

[Stephane_L]

no.

[Vidar Berg]

Ok. The script seems to crash in pyserial when it attempts to set the baudrate for one of your devices.  Apart from the sniffer, do you have any other serial TTY's connected to your mac?

[Stephane_L]

Yes but no user application.

 tty.BLTH

tty.Bluetooth-Incoming-Port

I think it must be bluetooth for my keyboard and my mouse.

[Vidar Berg]

Thanks for confirming. This should be fine, same ports are listed on my system as well.  I will ask the developers about this to see if they have any thoughts on what the issue could be.

[Stephane_L]

ok

[Vidar Berg]

Could you please try to apply the following 2 changes to the UART.py script in your extcap directory?

diff --git a/Host/SnifferAPI/UART.py b/Host/SnifferAPI/UART.py
index bcae188..f4cff87 100644
--- a/Host/SnifferAPI/UART.py
+++ b/Host/SnifferAPI/UART.py
@@ -123,11 +123,10 @@ class Uart:

self.ser = serial.Serial(
port=portnum,
- baudrate=9600,
+ baudrate=baudrate,
rtscts=True,
exclusive=True
)
- self.ser.baudrate = baudrate

except Exception:
if self.ser:

[Stephane_L]

Yes.

I did it manually.

self.ser = serial.Serial(
port=portnum,
baudrate=baudrate,
rtscts=True,
exclusive=True
)

except Exception:
if self.ser:
self.ser.close()
self.ser = None
raise

and i get the same error.

  File "~/Library/Python/3.8/lib/python/site-packages/serial/serialposix.py", line 225, in _set_special_baudrate

    fcntl.ioctl(self.fd, IOSSIOSPEED, buf, 1)

[Vidar Berg]

It's a bit  difficult to debug as we still have not been able to replicate the issue on our end, unfortunately.  Could you try to apply this change as well:

--- a/Host/SnifferAPI/UART.py
+++ b/Host/SnifferAPI/UART.py
@@ -63,7 +63,7 @@ def find_sniffer(write_data=False):
reader = None
l_errors = [serial.SerialException, ValueError, Exceptions.LockedException]
if os.name == 'posix':
- l_errors.append(termios.error)
+ l_errors.append(termios.error, OSError)
try:
reader = Packet.PacketReader(portnum=port, baudrate=rate)
try:

?

Thanks,

[Stephane_L]

It gives an error

  File "nrf_sniffer_for_bluetooth_le_4.1.0/extcap/SnifferAPI/UART.py", line 66, in find_sniffer

    l_errors.append(termios.error, OSError)

TypeError: append() takes exactly one argument (2 given)

[Vidar Berg]

Sorry, append() only lets you add one element at a time. Can you try this instead: 

--- a/SnifferAPI/UART.py
+++ b/SnifferAPI/UART.py
@@ -61,7 +61,8 @@ def find_sniffer(write_data=False):
     for port in [x.device for x in open_ports]:
         for rate in SNIFFER_BAUDRATES:
             reader = None
-            l_errors = [serial.SerialException, ValueError, Exceptions.LockedException]
+            l_errors = [serial.SerialException, ValueError,
+                        Exceptions.LockedException, OSError]
             if os.name == 'posix':
                 l_errors.append(termios.error)
             try: