# pocket_polar: WOOSIM PORTI-SM40 printer commands

> pocket_polar investigates command bytes for a WOOSIM PORTI-SM40 Bluetooth receipt printer. Python scripts pack style, alignment and image commands and write them to a Bluetooth serial device; the image path is marked unfinished.

- Type: Case study
- Targets: Protocol
- Category: Independent reconstruction cases
- Relationship: Independent reconstruction project
- Sources reviewed: 2026-11-06
- Added to the catalog: 2026-11-08
- Original resource: <https://github.com/jongwony/pocket_polar>
- Primary source: <https://github.com/jongwony/pocket_polar/blob/cd65eacf95a8092c1dc55513aa26983f471c6d9b/print_text.py>
- Catalog page: <https://awesomerea.org/resources/pocket-polar-case/>
- Record JSON: <https://awesomerea.org/resources/pocket-polar-case/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/pocket-polar-case/index.md)

## Requirements & limits

- **Prerequisites:** The scripts address a WOOSIM PORTI-SM40 printer through a Bluetooth serial device path.
- **Prerequisites:** The README lists Python 3.6 for binary packing; the image script imports wand.
- **Limits:** Image printing is marked as not working.
- **License:** No licence file in the repository.

## Primary sources

1. <https://github.com/jongwony/pocket_polar/blob/cd65eacf95a8092c1dc55513aa26983f471c6d9b/print_text.py>
2. <https://github.com/jongwony/pocket_polar/blob/cd65eacf95a8092c1dc55513aa26983f471c6d9b/README.md>
3. <https://github.com/jongwony/pocket_polar/blob/cd65eacf95a8092c1dc55513aa26983f471c6d9b/print_image.py>

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## About this entry

The description was reviewed against primary sources.
Original editorial content: MIT. Linked projects, papers and assets retain their own rights and licenses.