Connection problem Ubuntu

[alexarje]

So when I try to run python3 myo_to_osc.py on Ubuntu 17.10, I get the following error:

available BT adapter: /dev/ttyACM0
Traceback (most recent call last):
File "/home/alexanje/.local/lib/python3.6/site-packages/serial/serialposix.py", line 265, in > open
> self.fd = os.open(self.portstr, os.O_RDWR | os.O_NOCTTY | os.O_NONBLOCK)
PermissionError: [Errno 13] Permission denied: '/dev/ttyACM0'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "myo_to_osc.py", line 60, in
> m = Myo() # scan for USB bluetooth adapter and start the serial connection automatically
File "/home/alexanje/github/myo-to-osc/myo/init.py", line 58, in init
> self.bt = BT(tty, baudrate=115200)
File "/home/alexanje/github/myo-to-osc/myo/bluetooth.py", line 70, in init
> self.ser = serial.Serial(port=tty, baudrate=baudrate, dsrdtr=1)
File "/home/alexanje/.local/lib/python3.6/site-packages/serial/serialutil.py", line 240, in > init
> self.open()
File "/home/alexanje/.local/lib/python3.6/site-packages/serial/serialposix.py", line 268, in > open
> raise SerialException(msg.errno, "could not open port {}: {}".format(self._port, msg))
serial.serialutil.SerialException: [Errno 13] could not open port /dev/ttyACM0: [Errno 13] > Permission denied: '/dev/ttyACM0'

Turns out to be a permission problem. There are some non-ideal solutions here. To be able to continue testing, I opted for doing sudo chmod 666 /dev/ttyACM0 for now, but this will have to be done every time the dongle is inserted.

[alexarje]

Doing the above works, though, so now I am connected!

[cpmpercussion]

Interesting - I haven't checked the permissions of serial ports in Ubuntu, but looking at that SO thread suggests that such serial ports are part of the group dialout, so if you added yourself to that group you would have RW access to /dev/ttyACM0.