FNIRSI DPS-150

Small synchronous Python library for controlling an FNIRSI DPS-150 over USB serial.

Credit

This project’s packet layout, command IDs, and initial protocol assumptions were derived from the reverse-engineering work published by cho45 in cho45/fnirsi-dps-150. This library reimplements that protocol in Python and validates behavior against a real connected DPS-150 device.

Setup

python -m pip install fnirsi-dps150

Development Setup

python3 -m venv .venv
source .venv/bin/activate
python -m pip install --upgrade pip
python -m pip install ".[dev]"

Usage

from fnirsi_dps150 import DPS150

with DPS150("/dev/cu.usbmodem146061B040251") as dps:
    dps.set_voltage(5.0)
    dps.set_current(1.0)
    print(dps.read_voltage())
    print(dps.read_current())
    print(dps.read_state())

CLI

source .venv/bin/activate
fnirsi-dps150 --port /dev/cu.usbmodem146061B040251 read-state
fnirsi-dps150 --port /dev/cu.usbmodem146061B040251 read-voltage
fnirsi-dps150 --port /dev/cu.usbmodem146061B040251 read-current
fnirsi-dps150 --port /dev/cu.usbmodem146061B040251 set-voltage 5.0
fnirsi-dps150 --port /dev/cu.usbmodem146061B040251 set-current 0.5
fnirsi-dps150 --port /dev/cu.usbmodem146061B040251 output-on
fnirsi-dps150 --port /dev/cu.usbmodem146061B040251 output-off

Hardware Validation

Run the real-device script:

source .venv/bin/activate
python scripts/validate_device.py

License

MIT. See LICENSE.

Publishing

Build artifacts for manual upload:

python -m pip install --upgrade build twine
python -m build
python -m twine check dist/*
python -m twine upload dist/*