# mg6250_mqtt: decoding Paradox MG6250 serial events

> mg6250_mqtt reconstructs part of the Paradox MG6250 alarm console's serial event protocol. It documents frame lengths, event fields and CRC-16/MODBUS checksums, and provides a Python test client plus an ESP8266 sketch that forwards decoded events to MQTT.

- 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/bmpc/mg6250_mqtt>
- Primary source: <https://github.com/bmpc/mg6250_mqtt/blob/5f51c7d59d2bcb09194c4abeff613ece32e63c51/README.md>
- Catalog page: <https://awesomerea.org/resources/mg6250-mqtt-protocol-case/>
- Record JSON: <https://awesomerea.org/resources/mg6250-mqtt-protocol-case/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/mg6250-mqtt-protocol-case/index.md)

## Requirements & limits

- **Prerequisites:** An MG6250 console serial connection; the MQTT sketch is designed for ESP8266.
- **Limits:** The implementation receives console messages only; remote arm and disarm are planned.
- **License:** GPL-3.0.

## Primary sources

1. <https://github.com/bmpc/mg6250_mqtt/blob/5f51c7d59d2bcb09194c4abeff613ece32e63c51/README.md>
2. <https://github.com/bmpc/mg6250_mqtt/blob/5f51c7d59d2bcb09194c4abeff613ece32e63c51/LICENSE>

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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.