bussdcc-hardware 0.29.0

Provides hardware device integrations for bussdcc.

BussDCC Hardware

bussdcc-hardware provides hardware device integrations for bussdcc.

It includes drivers for common buses and devices and exposes them through the BussDCC device system so they can be managed, monitored, and orchestrated by the runtime.

Architecture

Hardware in BussDCC is modeled as devices in a dependency graph. Bus devices are one common kind of dependency node.

Runtime
  ├── Bus Devices
  │     ├── I2C Bus
  │     ├── 1-Wire Bus
  │     └── GPIO Bus
  │
  └── Hardware Devices
        ├── Sensors
        ├── ADCs
        ├── Cameras
        └── Actuators

Each hardware component is represented as a BussDCC Device with a managed lifecycle:

connect → operate → disconnect

The runtime handles:

• device initialization
• dependency ordering
• failure detection
• online/offline status

Features

Bus Drivers

Hardware buses are modeled as devices themselves.

Currently supported:

I²C

bussdcc_hardware.bus.i2c

Features:

• bus discovery
• device address scanning
• register bus interface

1-Wire

bussdcc_hardware.bus.w1

Features:

• device discovery
• filesystem-based device access

Hardware Devices

NAU7802 Load Cell ADC

High precision load cell amplifier.

bussdcc_hardware.device.nau7802

Features:

• dual channel support
• calibration parameters
• automatic channel switching
• failure detection

DS18B20 Temperature Sensor

1-Wire temperature sensor.

bussdcc_hardware.device.ds18b20

Features:

• filesystem-based reading
• automatic offline detection

USB Camera

OpenCV-based camera integration.

bussdcc_hardware.device.usb_camera

Features:

• configurable resolution and FPS
• exposure control
• focus control
• white balance control
• automatic failure recovery

Digital Output

Simple GPIO-based actuator for controlling devices such as pumps, relays, LEDs, or lights.

bussdcc_hardware.device.digital_output

Features:

• on/off control
• safe shutdown

Device Configuration

All devices use typed dataclass configurations.

Example:

from bussdcc_hardware.device.nau7802 import NAU7802Config

config = NAU7802Config(
    bus_id="i2c0",
    addr=0x2A,
)

Configuration metadata includes UI hints:

• labels
• groups
• help text
• numeric constraints
• dependency references

This allows configuration systems or web interfaces to automatically generate forms.

Example metadata:

{
  "label": "Frame Width",
  "group": "Video",
  "min": 160,
  "max": 3840
}

Device Discovery

Hardware integrations are registered using Python entry points.

bussdcc.device

The registry loads available devices automatically:

from bussdcc_hardware.registry import registry

registry.devices

Unavailable drivers (missing optional dependencies) are detected and reported.

Optional Dependencies

Some hardware drivers require additional libraries.

Install them using extras:

pip install bussdcc-hardware[nau7802]
pip install bussdcc-hardware[digital_output]
pip install bussdcc-hardware[usb_camera]

Example

Example hardware configuration:

runtime.add_device(
    "i2c0",
    "i2c",
    {
        "bus": 1
    }
)

runtime.add_device(
    "scale_adc",
    "nau7802",
    {
        "bus_id": "i2c0",
        "addr": 0x2A
    }
)

The runtime attaches devices in dependency order.

Design Goals

Hardware as first-class devices

Buses and sensors are modeled the same way as any other BussDCC device.

Runtime-managed lifecycle

Devices automatically:

• connect
• report failures
• recover when possible

Strong typing

All configurations are statically typed dataclasses.

Composable integrations

Hardware modules can be distributed as independent packages and discovered through entry points.

Installation

pip install bussdcc-hardware

Optional drivers:

pip install bussdcc-hardware[nau7802]
pip install bussdcc-hardware[digital_output]
pip install bussdcc-hardware[usb_camera]

Related Projects

• bussdcc — cybernetic runtime kernel
• bussdcc-framework — runtime utilities and web interface

License

MIT License