WP4 Dosing Unit Dosimat 876 Plus

This repository contains:

• The driver for the dosing unit Dosimat 876 Plus that uses the serial port for communication.
• The HTTP server that provides a REST API to control the dosing unit.

Getting Started

We use the obsolete way of installing Python packages using setup.py to avoid issues with the missing Rust compiler for the cryptography package [1, 2].

# Create and activate a virtual environment
python -m venv .venv
source .venv/bin/activate

# Install the packages
pip install -r requirements.txt
python setup.py install

# Run the manual test
python tests/manual_driver_test.py

To start an HTTP server, run:

DOSIMAT_SERIAL_PORT_1=/dev/ttyUSB0 uvicorn dosimat_http.main:app --host "0.0.0.0" --port 8080

It's expected to have 6 dosing units connected together through LogiLink. Specify environment variables DOSIMAT_SERIAL_PORT_1 to DOSIMAT_SERIAL_PORT_6 to configure the serial ports, e.g., DOSIMAT_SERIAL_PORT_1=/dev/ttyUSB0.

To query the status of the dosing units, run:

curl "http://localhost:8080/dosimats/1/status"

To dispense 10 ml of liquid from the dosing unit 1, run:

curl -X POST "http://localhost:8080/dosimats/1/dispense?ml=10"