twinleaf 0.2.2

Communications library and utilities for Twinleaf I/O (TIO) devices

Twinleaf Python (using the Rust backend)

This library is under active development; interfaces are subject to change.

We welcome users to test and provide feedback.

These tools only works with devices employing Twinleaf I/O Generation 2, generally devices shipped starting in 2025. For earlier devices please use the tio-python package

This package implements a communications protocol to work with Twinleaf sensors using Twinleaf I/O (TIO) as the communications layer. Data from the sensors is received via PUB messages and sensor parameters may be changed using REQ/REP messages. This python package uses the twinleaf-rust backend to provide higher performance data handling.

Installation

Common platforms are support installation from PyPI using:

`pip install twinleaf`

Programming

Examples of basic usage can be found in the examples directory.

A console script itl is installed to provide an interactive tool for configuring devices as well.

Programming

The twinleaf module performs metaprogramming to construct an object that has methods that match the RPC calls available on the device. To interact with a Twinleaf CSB current supply, for example:

import twinleaf
csb = twinleaf.Device('serial://COM1')
csb.settings.coil.x.current(0.25) # mA

To receive data streams from a sensor such as the Twinleaf VMR vector magnetometer, use the named streams:

import twinleaf
vmr = twinleaf.Device('serial://COM1')
print(vmr.samples.vector(10))

To find possible tio ports to use run tio-proxy --enum. Windows will often output some COMx port such as serial://COM3, while Mac OS will output some cu.XXXXX or tty.XXXXX name such as serial:///dev/cu.usbserialXXXXXX or serial:///dev/tty.usbmodemXXXXXX.

If tio-proxy --enum does not work try looking at serial ports in the respective OS device manager for active serial ports.

Migration from tio-python

Whereas tio-python mixed data stream and rpc methods, this package separates two two under distinct namespaces samples.* and settings.*.

Specifying a time duration for the number of samples is not yet supported; only a number of samples can be requested.

Prerequisites

Python >= 3.10 is required.

Windows issues

Windows users who can't run python might need to add python to their path.

Windows users who run into an error installing packages may need to enable long paths.

Windows console scripts are installed in an odd folder which may be added to your path:

C:\Users\username\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.10_qbz5n2kfra8p0\LocalCache\local-packages\Python310\Scripts

Development

Ensure the rust compiler is installed. Use pip install -e . to build the package.