Error brother_ql_analyse and brother_ql_print about brother_ql HOT 10 CLOSED

Which matplotlib packages are required to be installed?

A similar error occurs with:

brother_ql_print test.bin /dev/usb/lp0
/usr/local/lib/python2.7/dist-packages/matplotlib/font_manager.py:273: UserWarning: Matplotlib is building the font cache using fc-list. This may take a moment.
warnings.warn('Matplotlib is building the font cache using fc-list. This may take a moment.')

resulting in infintely red blinking light on QL-570 and no printing.

Trying other way to print also fails:

cat test.bin> /dev/usb/lp0
cat: write error: Input/output error

Printing via USB address also fails:

brother_ql_print test.bin usb://0x04f9:0x2028
Traceback (most recent call last):
File "/usr/local/bin/brother_ql_print", line 9, in
load_entry_point('brother-ql==0.6.dev0', 'console_scripts', 'brother_ql_print')()
File "/usr/local/lib/python2.7/dist-packages/brother_ql/brother_ql_print.py", line 85, in main
result = interpret_response(data)
File "/usr/local/lib/python2.7/dist-packages/brother_ql/reader.py", line 150, in interpret_response
assert len(data) >= 32
AssertionError

from brother_ql.

The error that happens from the initial issue description is rather a Python2 compat problem. The package was created for Python3. I didn't test it on Python2! The matplotlib warning is not a problem here, just a "warning". Your follow-up comment is about a different problem. Usually the printer's status word is 32 bytes long. What printer are you trying to use? Unfortunately I have to catch a flight and have to leave you with the issues for the next 14 days. Sorry.

from brother_ql.

Ah, so switching over to Python 3 (which I prefer) would sove this? I need it working Thursday next week. 😨 any help would be appreciated.

So the installation should be pip3 instead of pip?!

from brother_ql.

With pip3 the analyse still gives warnings but provides proper output

...
Page saved as page0001.png

Perhaps hide or prevent those warnings.

from brother_ql.

Printing as root now is:

a) cat test.bin > /dev/usb/lp0 results in no print and indefenite red blinking light until power cycle.

b) brother_ql_print test.bin /dev/usb/lp0 results in no print and indefenite red blinking light until power cycle and error:

ERROR:brother_ql.reader:Error: Transmission / Communication error
ERROR:brother_ql.brother_ql_print:Errors occured: ['Transmission / Communication error']
Traceback (most recent call last):
  File "/usr/local/bin/brother_ql_print", line 9, in <module>
    load_entry_point('brother-ql==0.6.dev0', 'console_scripts', 'brother_ql_print')()
  File "/usr/local/lib/python3.5/dist-packages/brother_ql/brother_ql_print.py", line 80, in main
    data = printer.read()
  File "/usr/local/lib/python3.5/dist-packages/brother_ql/backends/generic.py", line 36, in read
    ret_bytes = self._read(length)
  File "/usr/local/lib/python3.5/dist-packages/brother_ql/backends/linux_kernel.py", line 68, in _read
    data += os.read(self.read_dev, length)
OSError: [Errno 19] No such device

c) brother_ql_print test.bin usb://0x04f9:0x2028 results in no print and indefenite red blinking light until power cycle and error:

ERROR:brother_ql.reader:Error: Transmission / Communication error
ERROR:brother_ql.brother_ql_print:Errors occured: ['Transmission / Communication error']
WARNING:brother_ql.brother_ql_print:Printing potentially not successful?

Info:

lsusb |grep Brother
Bus 003 Device 017: ID 04f9:2028 Brother Industries, Ltd 

from brother_ql.

from brother_ql.

QL-570 with 62mm endless media. I can send the output of the debugger.

from brother_ql.

This works:

cat page0001.png | lpr -P Brother_QL-570
inkscape --without-gui --export-pdf=/dev/stdout drawing.svg | lpr -P Brother_QL-570

from brother_ql.

PRiority is less now. However, when you have fix for above errors, I am willing to retest it all.

from brother_ql.

Hi @PanderMusubi, I think the problem with the QL-570 should be fixed now. Please refer to #7. I'll close this issue here. If you still experience trouble with the QL-570, could you please consider reopening the other issue (because it's specific to that model) or opening a new one?
Thanks.
Also note that the restriction of brother_ql_create to 62mm endless labels was removed. Now, the tool accepts a --label-size parameter to work with (hopefully) any label offered by Brother.

from brother_ql.