# TSP143IIIU: reconstructing StarIO printer exchanges for a USB-to-Wi-Fi bridge

> TSP143IIIU Wi-Fi Print Bridge reconstructs StarIO exchanges so a Raspberry Pi can present a USB-only receipt printer to Shopify POS as a Star LAN printer. Its protocol research documents UDP discovery packets, USB and LAN ASB frame differences, ETB counters, and TCP/9101 status polling from hardware captures.

- Type: Case study
- Targets: Protocol
- Category: Independent reconstruction cases
- Relationship: Independent reconstruction project
- Sources reviewed: 2026-11-06
- Added to the catalog: 2026-11-09
- Original resource: <https://github.com/gnaunited/tsp143-bridge>
- Primary source: <https://github.com/gnaunited/tsp143-bridge/blob/fdeae061b8f6487dda14e9e17e817d29d07ddfe1/README.md>
- Catalog page: <https://awesomerea.org/resources/tsp143-stario-protocol-case/>
- Record JSON: <https://awesomerea.org/resources/tsp143-stario-protocol-case/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/tsp143-stario-protocol-case/index.md)

## Requirements & limits

- **Prerequisites:** A Raspberry Pi Zero 2 W, TSP143IIIU USB printer, and Shopify POS client are the documented setup.
- **Scope:** The protocol observations use a TSP143IIILAN reference printer with firmware V2.2.
- **License:** MIT.

## Primary sources

1. <https://github.com/gnaunited/tsp143-bridge/blob/fdeae061b8f6487dda14e9e17e817d29d07ddfe1/README.md>
2. <https://github.com/gnaunited/tsp143-bridge/blob/fdeae061b8f6487dda14e9e17e817d29d07ddfe1/research/README.md>
3. <https://github.com/gnaunited/tsp143-bridge/blob/fdeae061b8f6487dda14e9e17e817d29d07ddfe1/research/asb-states/notes.md>

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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.