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hambridge
Hardware to MQTT bridge (Visca and evdev)
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README
HaMBridge (Hardware-MQTT Bridge)
A headless Linux daemon that bridges hardware ↔ MQTT (Linux evdev, VISCA over serial or UDP, and related controller/device traffic).
The shipped binary is hambridge; systemd and packaging use the HaMBridge product name and
/etc/hambridge/ for machine-local state. Target YAML config lives under /etc/hambridge/config/
(see docs/user/ConfigurationGuide.md).
Summary
| Input | Output | MQTT Topic | Description |
|---|---|---|---|
| Linux evdev | MQTT JSON | controller/<slug>/event (pub)* |
Publish kernel input events as JSON (/dev/input/event*, endpoints with match.protocol: evdev) |
| VISCA (serial or UDP) | MQTT JSON | controller/<bus-slug>/event (pub), controller/<bus-slug>/status (pub), device/<slug>/telemetry (pub), device/<slug>/status (pub), device/<slug>/commandAck (pub) |
Decode controller traffic and device replies from RS-232 / RS-485 or UDP datagrams and publish JSON for subscribers. |
| MQTT JSON | VISCA (serial RS-232 / RS-485 or UDP/IP) | device/<slug>/<command> (sub) (bridge subscribes to device/#) |
Encode JSON payloads using device_mappings.visca (e.g. config/mappings/visca.yaml next to hambridge.yaml) and send on the device’s bus (transport: serial or transport: udp with per-endpoint udpHost / udpPort). |
- = Configurable
Documentation
- Install / deploy (preferred: distro packages): docs/user/INSTALL.md
- Configuration guide (YAML layout,
--config/BRIDGE_CONFIG, topics): docs/user/ConfigurationGuide.md - Developer / manual / interactive use: docs/developers/DEVELOPING.md
- Specification (versionless): docs/developers/Specification.md
- Release notes: CHANGELOG.md
- Roadmap (versioned): ROADMAP.md
What you get (MQTT surface)
- Control:
device/<slug>/<command>(VISCA mapping driven) - Device status:
device/<slug>/status(last controller + last reply; optional state cache) - Telemetry:
device/<slug>/telemetry(device replies; optional structureddecode) - Command acks:
device/<slug>/commandAck(bridge-originated command lifecycle) - Controller events:
controller/<bus-slug>/event(semantic or raw) - Controller bus status:
controller/<bus-slug>/status(last controller event + last device reply)
License
GPL-3.0-or-later. See LICENSE for the full text.
SPDX-License-Identifier: GPL-3.0-or-later