I'm having trouble listing available serial ports and I really need help debugging this. In Python 2.7.5 the COM-ports are listed correctly while PySerial returns an empty list in Python 3.3.5.
I found one other lonely soul with the same problems on the internet (no answers), but the problem doesn't seem to be popular at all - maybe it's my system?
I'm using Mac OS X 10.9.2 and installed python and python3 via homebrew. I updated everything just now. PySerial is at version 2.7 in both pip and pip3.
The output:
Python 2.7.5 (default, Nov 4 2013, 18:04:45)
[GCC 4.2.1 Compatible Apple LLVM 5.0 (clang-500.2.79)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> from serial.tools import list_ports
>>> list_ports.comports()
[['/dev/cu.Bluetooth-Incoming-Port', 'n/a', 'n/a'], ['/dev/cu.Bluetooth-Modem', 'n/a', 'n/a']]
Python 3.3.5 (default, Mar 10 2014, 13:25:50)
[GCC 4.2.1 Compatible Apple LLVM 5.0 (clang-500.2.79)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> from serial.tools import list_ports
>>> list_ports.comports()
[]
The Apple-provided build of Python is installed in /System/Library/Frameworks/Python. framework and /usr/bin/python , respectively.
Apple says that developers should use an alternative scripting language going forward, such as Python 3, but it's worth noting that Python 3 also does not come preinstalled on macOS. Developers can run the stub /usr/bin/python3 in Terminal, but it prompts users to install Xcode developer tools, which includes Python 3.
For the moment I'm resorting to the following method. The PySerial tools are broken.
>>> import glob
>>> glob.glob('/dev/tty.*')
['/dev/tty.Bluetooth-Incoming-Port', '/dev/tty.Bluetooth-Modem']
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