Topic: Cannot connect to eggbot – linux | Evil Mad Scientist Laboratories

Tagged: usb linux connect

This topic has 5 replies, 2 voices, and was last updated 5 years, 12 months ago by Windell Oskay.

Viewing 6 posts - 1 through 6 (of 6 total)

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December 23, 2018 at 7:29 am #27024

Mike K
Participant

Hi all,
I’m unable to use the eggbot on my Linux 16.04 laptop.
I’ve confirmed that the USB connection is working; when I use lsusb I see a new line:
`
Bus 002 Device 006: ID 04d8:fd92 Microchip Technology, Inc.
`
and I’ve confirmed that the device is there:
`
$ ls -l /dev/ttyACM*
crw-rw—- 1 root dialout 166, 0 Dec 23 07:16 /dev/ttyACM0
`
and I have dialout group
`
$ id
uid=1000(mike) gid=1000(mike) groups=1000(mike),20(dialout)
`
i’m running inkscape 0.92.3.

message:

`
Traceback (most recent call last):
File “eggbot.py”, line 1168, in <module>
e.affect()
File “/home/mike/snap/inkscape/4435/extensions/inkex.py”, line 285, in affect
self.effect()
File “eggbot.py”, line 189, in effect
self.serialPort = ebb_serial.openPort()
File “/home/mike/snap/inkscape/4435/extensions/ebb_serial.py”, line 88, in openPort
foundPort = findPort()
File “/home/mike/snap/inkscape/4435/extensions/ebb_serial.py”, line 49, in findPort
comPortsList = list(comports())
File “/home/mike/snap/inkscape/4435/extensions/serial/tools/list_ports_linux.py”, line 77, in comports
for info in [SysFS(d) for d in devices]
File “/home/mike/snap/inkscape/4435/extensions/serial/tools/list_ports_linux.py”, line 38, in __init__
self.vid = int(self.read_line(self.usb_device_path, ‘idVendor’), 16)
TypeError: int() can’t convert non-string with explicit base
`

December 23, 2018 at 7:58 am #27025
Mike K
Participant
The value for self.usb_device_path is

/sys/devices/pci0000:00/0000:00:14.0/usb2/2-6
```
mike@E7440:/sys/class/tty$ cat /sys/devices/pci0000:00/0000:00:14.0/usb2/2-6
cat: '/sys/devices/pci0000:00/0000:00:14.0/usb2/2-6': Is a directory
mike@E7440:/sys/class/tty$ ls /sys/devices/pci0000:00/0000:00:14.0/usb2/2-6
2-6:1.0              bDeviceClass     bNumConfigurations  devnum     ltm_capable   quirks     urbnum
2-6:1.1              bDeviceProtocol  bNumInterfaces      devpath    manufacturer  removable  version
authorized           bDeviceSubClass  busnum              driver     maxchild      remove
avoid_reset_quirk    bmAttributes     configuration       ep_00      port          speed
bcdDevice            bMaxPacketSize0  descriptors         idProduct  power         subsystem
bConfigurationValue  bMaxPower        dev                 idVendor   product       uevent
mike@E7440:/sys/class/tty$ cat /sys/devices/pci0000:00/0000:00:14.0/usb2/2-6/idVendor
04d8
```
I’ve found that the error being generated is actually “Permission Denied”, but that error message is swallowed by read_line. However, inkscape runs as user mike and that user is able to cat the file without any issue.
- This reply was modified 6 years ago by Mike K.
- This reply was modified 6 years ago by Mike K.
- This reply was modified 6 years ago by Mike K.
December 23, 2018 at 11:17 am #27028

Mike K
Participant

I’ve found that the error being generated is actually “Permission Denied”, but that error message is swallowed by read_line. However, inkscape runs as user mike and that user is able to cat the file without any issue.

December 23, 2018 at 12:06 pm #27030

Windell Oskay
Keymaster

You might try logging out and logging back in.

December 23, 2018 at 4:31 pm #27031

Mike K
Participant

i switched to a windows machine and it worked without issue, so i am confident that my eggbot is working correctly

December 25, 2018 at 8:37 pm #27033

Windell Oskay
Keymaster

I would suggest trying logging out and back in — that has resolved permissions issues of this sort in the past.
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