Operate a receipt printer with python

Related article

• Print notes with a receipt printer

Be in trouble

First of all, problem definition! I've tried using the task management tool many times and failed repeatedly, but I think it's because it's a hassle to open each task on my smartphone, so I can't see it physically. , I thought that I should print it with a printer, so I created these.

function

• Print text and images with a printer
• Set the font in PIL

What to use

• python3.6
• python-escpos library
• Python Imaging Library
• OS(ubuntu18.04LTS)
• [Receipt printer](https://www.amazon.co.jp/Symcode-58MM-USB- thermal receipt printer -? Print instruction set and compatibility / dp / B071X6RHM1 / ref = sr_1_6 adgrpid = 54026665180 & dchild = 1 & gclid = CjwKCAjwxLH3BRApEiwAqX9arSxbljEevQZn5vUPqoNranPZsNpVG2WyzRo8Ex8Z0WoQ70gO7BsMqxoCYZ0QAvD_BwE & hvadid = 338579793965 & hvdev = c & hvlocphy = 19009318 & hvnetw = g & hvqmt = b & hvrand = 7868074443600921801 & hvtargid = kwd-312095979101 & hydadcr = 19158_11045751 & jp-ad-ap = 0 & keywords = receipt + printer & qid = 1592615126 & sr
• 

design

1. Settings and coding 1

First of all, investigate the printer settings and what characters can be printed with the receipt printer

Install the library used by python

pip install python-escpos
pip install Pillow

I used a free font as the font.

Free font site

Printing with a printer

from escpos.printer import Usb
from escpos import *

from PIL import Image
from PIL import ImageDraw
from PIL import ImageFont

#Printing using a receipt printer

width = 500
height = 250

image = Image.new('1', (width, height), 255)
draw = ImageDraw.Draw(image)
font = ImageFont.truetype('FLOPDesignFont.ttf', 50, encoding='unic')
draw.text((0, 0), "Japanese" + " ", font=font, fill=0)
font = ImageFont.truetype('FLOPDesignFont.ttf', 28, encoding='unic')
draw.text((0, 82), "abcdefghijklmnopqrstuvwxyz", font=font, fill=0)
draw.text((0, 112), "ABCDEFGHIJKLMNOPQRSTUVWXYZ", font=font, fill=0)
draw.text((0, 142), "1234567890" + " ", font=font, fill=0)
draw.text((0, 172), "!\"#$%&'()=~|+*<>?_{}" + " ", font=font, fill=0)

p = Usb(0x0416, 0x5011, 0, 0x81, 0x03)
p.text("Hello World\n")
p.image(image)
p.cut()

The printed version is as follows.

• When executing text with p.text ("Hello World \ n "), the first position character disappears, so be careful.

USB settings

If you want to print with a receipt printer, you need to set this. I will confirm it.

p = Usb(0x0416, 0x5011, 0, 0x81, 0x03)

First, let's run lsusb

$ lsusb
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 006: ID 8087:07dc Intel Corp. 
Bus 001 Device 005: ID 0bda:579a Realtek Semiconductor Corp. 
Bus 001 Device 004: ID 0bda:0129 Realtek Semiconductor Corp. RTS5129 Card Reader Controller
Bus 001 Device 003: ID 0bda:b812 Realtek Semiconductor Corp. 
Bus 001 Device 008: ID 0416:5011 Winbond Electronics Corp. Virtual Com Port
Bus 001 Device 002: ID 062a:4102 Creative Labs 
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

The following are connected to the receipt printer. Bus 001 Device 008: ID 0416: 5011 Winbond Electronic's s Corp. Virtual Com Port This 0416:5011 part is the first and second Usb arguments.

You can print by adding sudo and running python with root privileges. At this time, add a rule to udev so that general users can access this device, and load the udev rule.

※udev Simply put, this USB manages something even if you plug or unplug a USB device. (Please check the link to be exact.)

udev settings Create a /etc/udev/rules.d/10-printer.rules file and write the following: If the device ID: 0416: 5011 is different in the previous lsusb, please also match this.

SUBSYSTEM=="usb", ATTR{idVendor}=="0416", ATTR{idProduct}=="5011", MODE="0666", GROUP="plugdev"

2. Settings and coding 2

Add the specified image as a logo and print it Add the following image to the data created earlier and print it.

from escpos.printer import Usb
from escpos import *

from PIL import Image
from PIL import ImageDraw
from PIL import ImageFont

#Printing using a receipt printer

width = 500
height = 400

image = Image.new('1', (width, height), 255)
draw = ImageDraw.Draw(image)
font = ImageFont.truetype('FLOPDesignFont.ttf', 50, encoding='unic')
draw.text((0, 100), "Japanese" + " ", font=font, fill=0)
font = ImageFont.truetype('storage/font/FLOPDesignFont.ttf', 28, encoding='unic')
draw.text((0, 182), "abcdefghijklmnopqrstuvwxyz", font=font, fill=0)
draw.text((0, 212), "ABCDEFGHIJKLMNOPQRSTUVWXYZ", font=font, fill=0)
draw.text((0, 242), "1234567890" + " ", font=font, fill=0)
draw.text((0, 272), "!\"#$%&'()=~|+*<>?_{}" + " ", font=font, fill=0)

logo = Image.open('qiita-logo.png')

image.paste(logo, (150, 10))

# image.show()
p = Usb(0x0416, 0x5011, 0, 0x81, 0x03)
p.text(" \n")
p.image(image)
p.cut()

Summary

You can now print text and simple images on your receipt printer. By the way, I chose the receipt printer this time simply because the price is cheap. The receipt printer costs 4500 yen / 5 cash register papers cost about 900 yen!