This repository contains mostly short, single-purpose Python USB utility scripts demonstrating specific opcodes and functions on Wasatch Photonics USB spectrometers.

These are essentially a random mix of single-purpose one-off functional tests used for firmware verification and debugging. They are not consistently organized, labeled, documented, or maintained.

They DELIBERATELY eschew re-use (imported private dependencies) in order to maintain a "single script contains everything needed" model showing how little is required to communicate with the spectrometer over USB.

For more complete and organized information on how to control Wasatch spectrometers from Python, please see our Wasatch.PY repository, which contains the same back-end driver code used to support our own cross-platform ENLIGHTEN™ spectroscopy application.

The formal USB API supported by our spectrometers is documented in Wasatch Photonics' engineering document "ENG-0001 FID (Feature Identification Device) USB API (Application Programming Interface)", available on our website:

• https://wasatchphotonics.com/technical-resources/

This document is often used in conjunction with "ENG-0034 EEPROM Specification", hosted at the same link.

To use these Python scripts, you may need to install up to five different software products:

1. Git (unless already installed)
2. Clone the Python-USB-WP-Raman-Examples repository
3. Install Python itself (unless you already have Python 3.7+ installed)
4. Install Python library dependencies (pip packages)
5. libusb .inf files for Wasatch USB devices

Download the latesst 64 bit version of Git for Windows.

https://git-scm.com/download/win

After installation, open a Git Command shell, change into whatever directory holds your source code projects, and type (HTTPS example shown):

C:> git clone https://github.com/WasatchPhotonics/Python-USB-WP-Raman-Examples.git
C:> cd Python-USB-WP-Raman-Examples

TODO: add example for creating SSH keys and adding to GitHub profile

You can get Python from Python.org here:

• https://www.python.org/downloads/windows/

We recommend the latest "stable / released" 64-bit version, currently 3.10 or 3.11 by platform.

The Python.org distribution will install into /Users/username/AppData/Local/Programs/Python/Python311, and will not add a program "python.exe" to your path.

However, it will add a "py.exe" to your path, which you should be able to confirm by opening Command Prompt or Git Cmd shell and typing:

C:> where py
C:\Windows\py.exe

C:> py --version
Python 3.11.4

The following pip modules should allow you to run the majority of scripts in the repository:

C:> py -m pip install pyusb libusb matplotlib numpy

These examples assume that your computer can see and control your spectrometer via a libusb-compatible driver (appears under "libusb-win32" in Device Manager). The simplest way to install these drivers is generally to install ENLIGHTEN:

• https://wasatchphotonics.com/enlighten/

Otherwise, see Wasatch.PY for information on configuring libusb for your platform (remembering to include the udev rules file for Linux and Raspberry Pi).