README backends: *network* backend can't read printer state
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@@ -172,16 +172,18 @@ There are multiple backends for connecting to the printer available (✔: suppor
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Backend | Kind | Linux | Mac OS | Windows
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-------|-------|---------|---------|--------
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network | TCP | ✔ | ✔ | ✔
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linux\_kernel | USB | ✔ (1) | ✘ | ✘
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pyusb (2) | USB | ✔ (2a) | ✔ (2b) | ✔ (2c)
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network (1) | TCP | ✔ | ✔ | ✔
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linux\_kernel | USB | ✔ (2) | ✘ | ✘
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pyusb (3) | USB | ✔ (3a) | ✔ (3b) | ✔ (3c)
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Notes:
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1. The label printer should show up automatically as `/dev/usb/lp0` when connected.
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1. The network backend doesn't support reading back the printer state, currently.
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Failure such as *wrong label type* or *end of label roll reached* won't be detected by this software.
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2. The label printer should show up automatically as `/dev/usb/lp0` when connected.
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Please check the ownership (user, group) of this file to be able to print as a regular user.
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Consider setting up a udev .rules file.
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2. PyUSB is a Python wrapper allowing to implement USB communication in userspace.
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3. PyUSB is a Python wrapper allowing to implement USB communication in userspace.
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a. On Linux: install libusb1 as offered by your distribution: `sudo apt-get install libusb-1.0-0` (Ubuntu, Debian), `sudo zyppe in libusb-1_0-0` (OpenSUSE), `sudo pacman -S libusb` (Arch).
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b. On Mac OS: Install [Homebrew](https://brew.sh/) and then install libusb1 using: `brew install libusb`.
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c. On Windows: download [libusb-win32-devel-filter-1.2.6.0.exe](https://sourceforge.net/projects/libusb-win32/files/libusb-win32-releases/1.2.6.0/)
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