paperang-p2-lib 0.1.1

Python library for Paperang P2 thermal printer (USB protocol)

paperang-p2-lib

Python library for Paperang P2 thermal printer (USB protocol).

Based on hurui200320/java-paperang-p2-usb protocol.

Features

• USB connection to Paperang P2 printer
• Text printing (CJK support with optional [cjk] extra)
• Image printing with adjustable brightness/contrast/threshold
• QR code generation and printing
• Pickup code printing (large bold)
• Print profiles (portrait, landscape, document, etc.)
• Pattern test and heat density test
• Status and battery reading

Installation

# Basic
pip install paperang-p2-lib

# With QR code support
pip install paperang-p2-lib[qr]

# All extras
pip install paperang-p2-lib[qr]

Usage

from paperang import PaperangP2

printer = PaperangP2()
printer.connect()

# Print text
printer.print_text("Hello World!", font_size=24)

# Print image
printer.print_image("photo.jpg", profile="portrait")

# Print QR code
printer.print_qr("https://example.com")

# Print pickup code
printer.print_pickup_code("19-4308")

# Get status
status = printer.get_status()
battery = printer.get_battery()

API Reference

PaperangP2 Class

Method	Description
connect()	Connect to printer via USB
print_text(text, font_size, heat_density)	Print text (CJK requires [cjk] extra)
print_image(path, heat_density, feed_before, feed_after, threshold, brightness, contrast)	Print image
print_qr(content, box_size, heat_density, max_width)	Print QR code
print_pickup_code(code, heat_density)	Print large bold pickup code
set_heat_density(density)	Set heat density (0-100)
set_paper_type(paper_type)	Set paper type (0=normal, 1=continuous)
feed(lines)	Feed paper
print_test_page()	Print test page
get_status()	Get printer status
get_battery()	Get battery level
print_pattern_test()	Print pattern test
print_heat_density_test()	Print heat density gradient

Utility Functions

• crc32_paperang(data, seed) — Paperang-specific CRC32
• pack_packet(cmd, data, packet_remain) — Pack protocol packet
• load_profiles(profiles_path) — Load print profiles from JSON
• list_profiles(profiles_path) — Print available profiles

Fonts

Font	Size	Included	Purpose
DejaVuSans	742K	✅ Always	Latin text fallback
DejaVuSans-Bold	693K	✅ Always	Pickup codes (bold)
wqy-microhei	5.0M	✅ Always	CJK (Chinese/Japanese/Korean)

CJK text is supported out of the box with the bundled wqy-microhei font.

Protocol Details

• Vendor ID: 0x4348
• Product ID: 0x5584
• Print width: 576 pixels (72 bytes/line)
• Packet size: 14 lines per packet (1008 bytes)

Packet Format

[0x02] [CMD:1B] [packetRemain:1B] [dataLength:2B LE] [DATA:0-1023B] [CRC32:4B LE] [0x03]

Key Commands

Command	Description
0x00	Print bitmap data
0x0C	Get status
0x10	Get battery level
0x19	Set heat density (0-100)
0x1A	Feed paper
0x1B	Print test page
0x2C	Set paper type

CRC32

Custom seed 0x35769521 (standard CRC32 uses 0x00000000).

Related Projects

• paperang-p2-usb — CLI + MQTT wrapper
• paperang-hacs — Home Assistant integration (HACS)

License

MIT