# M3508I: reconstructing the motor RS485 protocol

> m3508i reconstructs the M3508I motor’s half-duplex RS485 command and reply format. The repository documents field offsets, motor selection, speed encoding and CRC16, and supplies a C frame builder and parser, an STM32 example and an adapter-board design.

- 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/ChenYehuiCN/m3508i>
- Primary source: <https://github.com/ChenYehuiCN/m3508i/blob/654e068573094f893945cb492c87f5f5d454d854/README.md>
- Catalog page: <https://awesomerea.org/resources/m3508i-rs485-case/>
- Record JSON: <https://awesomerea.org/resources/m3508i-rs485-case/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/m3508i-rs485-case/index.md)

## Requirements & limits

- **Prerequisites:** An M3508I motor and RS485 connection are needed for hardware use; the example targets an STM32F407 board.
- **Limits:** The current/torque and temperature fields remain raw values without conversion formulas.
- **License:** MIT license.

## Primary sources

1. <https://github.com/ChenYehuiCN/m3508i/blob/654e068573094f893945cb492c87f5f5d454d854/README.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.