# NiimBridge: reconstructing the NIIMBOT D110_M print protocol

> NiimBridge reconstructs the NIIMBOT D110_M printer's Bluetooth print exchange from HCI captures of the vendor Android app. Its Kotlin driver implements packet framing, checksums, row encoding, transport, and print-state handling; a separate SDK and diagnostic app expose printing and packet inspection. The author reports byte-identical packet comparisons for two captured jobs.

- 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/KunalBhargava182/OpenNiimbot-NiimBridge>
- Primary source: <https://github.com/KunalBhargava182/OpenNiimbot-NiimBridge/blob/ee1de755120f38734680f233a21eb38e1e970bc9/README.md>
- Catalog page: <https://awesomerea.org/resources/niimbridge-d110m-case/>
- Record JSON: <https://awesomerea.org/resources/niimbridge-d110m-case/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/niimbridge-d110m-case/index.md)

## Requirements & limits

- **Prerequisites:** Android Studio, JDK 17, and a NIIMBOT D110_M paired with the test device are required.
- **Prerequisites:** The primary Bluetooth Classic SPP transport requires the printer to be bonded in Android settings.
- **License:** MIT license.

## Primary sources

1. <https://github.com/KunalBhargava182/OpenNiimbot-NiimBridge/blob/ee1de755120f38734680f233a21eb38e1e970bc9/README.md>
2. <https://github.com/KunalBhargava182/OpenNiimbot-NiimBridge/blob/ee1de755120f38734680f233a21eb38e1e970bc9/docs/PROTOCOL.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.