linux下使用小票打印

linux下使用小票打印

打印机: Xprinter XP-58IIH指令支持: ESC/POS接口: USB, 蓝牙

Linux系统: Centos7

蓝牙配对很快, 配对好后就是连接状态. 但很快变为断开, 且连接灰显, 无法点击. USB连接后, 设备下添加找不到该打印机.

命令可以访问. # dmesg |grep usb    可以找到这个usb设备. [27129.204196] usb 5-1: USB disconnect, device number 2[27131.204164] usb 4-1: USB disconnect, device number 23[27131.204810] usblp0: removed[27131.661125] usb 4-1: new full-speed USB device number 24 using uhci_hcd[27132.175092] usb 4-1: device not accepting address 24, error -71[27132.885079] usb 4-1: new full-speed USB device number 26 using uhci_hcd[27133.410080] usb 4-1: new full-speed USB device number 27 using uhci_hcd[27146.910034] usb 4-1: new full-speed USB device number 28 using uhci_hcd[27147.063419] usb 4-1: New USB device found, idVendor=0483, idProduct=070b[27147.063428] usb 4-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3[27147.063433] usb 4-1: Product: USB Printing Support[27147.063439] usb 4-1: Manufacturer: Printer-58[27147.063443] usb 4-1: SerialNumber: ÿ[27147.070697] usblp 4-1:1.0: usblp0: USB Bidirectional printer dev 28 if 0 alt 0 proto 2 vid 0x0483 pid 0x070B

# ls /dev/usb/hiddev0 lp0这里找到的lp0就是打印机了.

# stat /dev/usb/lp0 可以查看状态. 文件："/dev/usb/lp0"大小：0 块：0 IO 块：4096 字符特殊文件设备：5h/5d Inode：362047 硬链接：1 设备类型：b4,0权限：(0660/crw-rw----) Uid：( 0/ root) Gid：( 7/ lp)环境：system_u:object_r:printer_device_t:s0最近访问：2018-11-30 19:29:30.747413683 +0800

# echo "Hello" > /dev/usb/lp0尝试打印. # echo "$(date)" > /dev/usb/lp0

$ echo "Hello" > /dev/usb/lp0bash: /dev/usb/lp: Permission denied

$ cat group |grep lp    // 查看用户组信息$ sudo cat gshadow $ sudo gpasswd -a toma lp   //将当前用户toma添加到用户组 lp 里$ sudo cat gshadow $ cat group |grep lp$ echo "Hello" > /dev/usb/lp0$ sudo echo "Hello" > /dev/usb/lp0

将用户添加到 lp 组，再试，若仍然有问题，重启后再试。

理论是不用安装驱动就可以通过这种方式打印，至少打印英文和数字。如下有使用脚本按格式打印的参考。https://mike42.me/blog/2015-03-getting-a-usb-receipt-printer-working-on-linuxhttps://github.com/mike42/escpos-php

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https://mrchi.cc/p/ea7c782e774e508f88fb16023ed51c7e/使用Python操作ESCPOS协议热敏打印机  2017-10-30

硬件：芯烨(Xprinter) XP-58IIQ USB接口热敏打印机，兼容ESC/POS打印协议；软件：python-escpos==3.0a3，是一个alpha测试版本，接口在将来可能会变动。pip install python-escpos如果在树莓派上使用，需要先安装 libjpeg8-dev 包sudo apt-get install libjpeg8-dev

把当前用户加入到lp组，使其能够访问打印机sudo usermod -a -G lp pi

定义打印机实例所有的打印机类都定义于escpos.printer文件中。

USB打印机class escpos.printer.Usb(idVendor, idProduct, timeout=0, in_ep=130, out_ep=1, *args, **kwargs)

在创建打印机实例之前，你需要获取一些打印机的参数。

使用lsusb命令，在输出中得到VendorID和Product ID，它们的格式是xxxx:xxxx，位置在设备名之前。$ lsusbBus 005 Device 011: ID 0483:070b STMicroelectronics

根据Vendor ID和Product ID，可以得到“EndPoint”地址。

# lsusb -vvv -d 0483:070b | grep bEndpointAddress bEndpointAddress 0x81 EP 1 IN bEndpointAddress 0x02 EP 2 OUT

$ lsusb -vvv -d 0483:070b | grep bEndpointAddresscan't get device qualifier: Resource temporarily unavailablecan't get debug descriptor: Resource temporarily unavailable bEndpointAddress 0x81 EP 1 IN bEndpointAddress 0x02 EP 2 OUT得到：“EndPoint”地址IN方向为0x81，OUT方向为0x02。用这些参数可以新建一个Usb类实例。timeout参数表示等待USB接口超时时间，默认为0。from escpos import printerp = printer.Usb(0x1a2b, 0x1a2b, timeout=0, in_ep=0x81, out_ep=0x02)该类使用pyusb和libusb与USB接口打印机通信，不适用于USB转串口适配器设备，只适用于原生USB驱动。

ESC/POS API详解所有的打印机类都继承自escpos.escpos.Escpos，该Escpos抽象基类定义了打印时的各种方法。先来个demo吧：from escpos.printer import Usbp = Usb(0x0483, 0x070b, 0, 0x81, 0x02)p.hw('INIT')p.textln('Hello, world!')p.image('mafengwo.png')p.set(align='center')p.qr('https://i.senguo.cc', size=7,)p.barcode('9787111436737', 'EAN13')p.close()

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更快找到并识别USB设备的办法： 

$ dmesg --color=always | tail---------- //拔掉USB线：----------[255085.496255] usb 4-1: USB disconnect, device number 7[255085.496447] usblp1: removed---------- //插回USB线：----------[255106.739497] usb 4-1: new full-speed USB device number 8 using uhci_hcd[255106.922452] usb 4-1: New USB device found, idVendor=0483, idProduct=070b, bcdDevice= 2.54[255106.922455] usb 4-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3[255106.922458] usb 4-1: Product: USB Printing Support[255106.922459] usb 4-1: Manufacturer: Printer-58[255106.922461] usb 4-1: SerialNumber: ÿ[255106.929662] usblp 4-1:1.0: usblp1: USB Bidirectional printer dev 8 if 0 alt 0 proto 2 vid 0x0483 pid 0x070B$

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方式二：需要安装cups服务，需要打印机的ppd文件。

 ppd文件：数据库生成的PPD文件包含有关重要打印机功能，可用选项以及如何构建渲染器（通常为Ghostscript）命令行的所有信息，具体取决于用户对选项的选择。

参见：https://www.cnblogs.com/sztom/p/10686925.html

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https://github.com/klirichek/zj-58Zj-58, Zj-80 and other receipt printersCUPS filter for cheap thermal receipt printers as Zijiang ZJ-58, XPrinter XP-58, JZ-80 with cutter, Epson TM-T20, and may be any other printers understanding ESC/POS commands.Originally it was reverse-engineered filter for Zijiang zj-58 with it's specific PPD, but later it is revealed that it actually works with many other cheap 58mm printers, like Xprinter XP-58.https://github.com/klirichek/zj-58/blob/master/zj58.ppd

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