tc4382.py

Low-level Python modules to send commands to Lihan TC4382 controllers.

Currently Supported Models

• TC4382 - tc4382.py

Features

• Connect to Lihan over USB
• Query sensor values
• Start, stop, modify and read setpoint

Requirements

• Install base class from https://github.com/COO-Utilities/hardware_device_base

Installation

pip install .

Usage

import tc4382

port = tc4382.find_port()
controller = tc4382.Tc4382()    # defaults to 336
controller.connect(port, 4800)  # USB port and baud rate

# start cryocooler
controller.start()

# stop cryocooler
controller.stop()

# Print coldhead temperature
print(controller.get_coldhead_temp())

# Print setpoint
print(controller.get_setpoint())

# For a comprehensive list of classes and methods, use the help function
help(tc4382)

🧪 Testing

Unit tests are located in tests/ directory.

To run all tests from the project root:

python -m pytest

Class Diagram

Below is a class diagram of the added methods and attributes for the lakeshore. See the README for the hardware_device_base module for the inherited methods and attributes.

classDiagram
    class Tc4382 {
        +Float read_timeout
        +serial.Serial ser
        +Str port
        +Int baudrate
        read_register() Int | None
        read_holding_register() Int | None
        write_holding_register() Bool
        start() Bool
        stop() Bool
        set_temperature() Bool
        get_coldhead_temp() float | None
        get_setpoint() float | None
    }

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