> For the complete documentation index, see [llms.txt](https://mapir.gitbook.io/daq/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://mapir.gitbook.io/daq/daq-u/capturing-light-sensor-data.md).

# Capturing Light Sensor Data

To record light measurements with the DAQ-U, connect it to a computer using USB-C. Chloros downloads and applies the sensor's per-unit radiometric calibration automatically, and writes each recording to a `.daq` file.

Choose the software method that fits your workflow:

## [Using Chloros GUI (Windows)](/daq/daq-u/capturing-light-sensor-data/using-chloros-gui-windows.md)

The Chloros desktop application — connect the DAQ-U, view the live spectrum, and record with a few clicks. Best for most users.

## [Using Chloros CLI (Windows, Linux)](/daq/daq-u/capturing-light-sensor-data/using-chloros-cli-windows-linux.md)

The `chloros-cli` command-line tool — test, discover, and record sensors from a terminal or script. Ideal for automation and headless / embedded devices.

## [Using Chloros SDK (Windows, Linux)](/daq/daq-u/capturing-light-sensor-data/using-chloros-sdk-windows-linux.md)

The Python `daq.sensors` package — stream and record measurements from your own code.

## Building Your Own Recorder

To record raw `.daq` files from your own computer or an embedded device, use the free, open-source [Chloros Scripts](https://github.com/mapircamera/chloros_scripts) (Python, MIT licensed). The scripts record raw (uncalibrated) data only — Chloros is still required to apply each unit's calibration and process the data.

{% hint style="info" %}
The Chloros GUI, CLI, and SDK all produce the same radiometrically calibrated `.daq` file. Full software instructions live in the Chloros Manual — see [docs.chloros.com](https://docs.chloros.com) *(link coming soon)*.
{% endhint %}