> ## Documentation Index
> Fetch the complete documentation index at: https://dragonwingdocs.qualcomm.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Develop

This section describes how to develop sensor applications and drivers using the Qualcomm® sensing hub (QSH) framework. Follow the client APIs track if you are building an application on the application processor. Follow the sensor APIs track if you are writing a sensor driver or algorithm on the low-power processor.

<CardGroup cols={2}>
  <Card title="Software for application and low-power processors" href="./software">
    Directory layout for the application processor source tree (`sensing-hub/`) and the low-power processor application digital signal processor (aDSP) framework.
  </Card>

  <Card title="Develop with client APIs" href="./develop_client_apis">
    For application developers on the application processor. Covers the QSH client API session workflow and the `SessionClient` sample application.
  </Card>

  <Card title="Develop with sensor APIs" href="./develop_sensor_apis">
    For driver and algorithm authors on the low-power processor. Covers the sensor and sensor instance lifecycle, QSH services, and stress testing with `see_workhorse`.
  </Card>
</CardGroup>