dawnpy-modbus

Modbus transport extension for dawnpy. Provides the dawnpy-modbus CLI for talking to Dawn devices over Modbus RTU.

Source: github.com/railab/dawnpy-modbus

Installation

Requires the core dawnpy package to be installed first:

pip install -e tools/dawnpy-modbus

Dependencies (installed automatically): dawnpy, click >= 8.1, pymodbus >= 3.1, < 4.

Command

dawnpy-modbus /dev/ttyUSB0 device1/descriptor.yaml device2/descriptor.yaml
dawnpy-modbus --help

The command requires a serial path followed by one or more descriptor paths. Each descriptor describes one Modbus node for descriptor-aware multi-node access.

Common options:

• --baudrate N: serial baudrate. Defaults to 115200.

• --parity N|O|E: serial parity. Defaults to even parity.

• --stopbits 1|2: serial stop bits. Defaults to 1.

• --timeout SECONDS: serial timeout. Defaults to 1.0.

• --unit N: Modbus slave address. Defaults to 1.

• --kconfig-var SYMBOL and --kconfig-values VALUES: apply Kconfig-derived object ID overrides to descriptor instances.

• --debug / --no-debug: enable verbose protocol logging.

Console

The interactive console shares the command set documented in Interactive Console Commands (see dawnpy-serial).

Tests

cd tools/dawnpy-modbus && tox
tox -e py        # tests + coverage
tox -e format    # formatting check
tox -e flake8    # linting
tox -e type      # type checking